5^th International Conference and Expo on Separation Techniques October 23-25, 2017 Paris, France

Biography:

Giuseppe Firpo is a Physicist and has expertise in Vacuum Technology, Nanotechnology for Biomedicine, and Polymeric Nano membranes. He is author of more than 70 scientific papers and 5 patents, and has been a founder of a Spin Off Company “Nanomed srl”. He is a part of the staff of a scientific group that develop micro and nano fluidic devices for applications in nanomedicine. He has expertise in nano fabrication techniques by Focused and Broad Ion beam, His recent research is focused on Polymeric Membranes with micro and nano thickness. His work investigates the dependence on thickness of the permeance to gas of polymeric membranes, and its influence on gas separation.

Abstract:

Statement of the Problem: Gas permeability of dense polymeric membranes is well described by solution diffusion model, where the driving force is the differential pressure across the membrane. Larger penetrants are more soluble than smaller penetrants, but diffusion decrease as penetrants size increase, consequently the process is gas-selective. Because of this property, membranes technologies have a significant opportunity to be a low-cost, low-energy solution for gas separation: for CO₂ capture or hydrogen recovery for example. In order to enhance the membrane permeance the technology efforts are focused on ultra-thin membrane fabrication. Unfortunately, this strategy has a weakness: the permeability decreases with the thickness because the surface chemical reaction rate limits gas transport across the membrane. It is therefore possible to introduce a characteristic thickness L_c below which the enhancement in gas flow is reduced respect to that expected. Similarly the selectivity change. The purpose of this study is to describe experiments of gas permeability across rubber polymer membranes with thicknesses the order of L_c. The investigation observes how the permeance and selectivity change with thickness, for the most important industrial gas. The study compare the data of flat surface membranes with nano-corrugated surface membranes Methodology: Spin coating is the technique used to fabricate polymeric thin membranes, and the rubber polymer is Poly Di Methyl Siloxane (PDMS). Gas permeability measurements are carried out on high vacuum apparatus. Findings: results confirm the permeability thickness dependence with L_c = 30 mm for CO₂ on PDMS and show how this effect influence the selectivity. Data on corrugated surface membranes reveal a permeance enhancement respect to that of flat-surface membranes. This effect is greater than expected and reported in literature. Conclusion: Surface kinetics affects membrane permeability and selectivity. The permeation rate can be increased by corrugation.

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Figure 1: Permeance vs thickness. The blue and red lines represent the permeance 𝓟, respectively with and without hypothesis of near-equilibrium at surfaces [4]. P_H = DS where D is the diffusivity and S the solubility

Biography:

Huamin Zhang currently serves as a full professor at Dalian Institute of Chemical Physics (DICP), Chinese Academy of Science (CAS); He is also CTO of Dalian Rongke Power Co., Ltd, director of the state key lab of flow battery for energy storage. He received his MS and PhD degree from Kyushu University in 1985 and 1988 respectively. And he joined in DICP as a full professor in 2000. His research interests include the topic of energy and energy storage, e.g. fuel cells, flow batteries and batteries with high specific energy density. Professor Zhang has co-authored more than 260 research papers published in refereed journals and more than 150 patents. He has received numerous awards from Chinese Government including outstanding Science and Technology Achievement Prize of the Chinese Academy of Sciences, National Technology Invention Award and Dalian Technology Invention Award etc.

Abstract:

Vanadium flow batteries (VFBs) have become one of the most promising technologies for large-scale energy storage applications due to their attractive features of high safety, high performance-price ratio in life cycle and environmental friendliness. Currently, VFBs are at the stage of demonstration, and the practicability and reliability of VFBs in large-scale energy storage applications were verified by numerous demonstrations. To promote the wide application of VFBs, the cost reduction is extremely important. Concerning the above issue, on the one side, it is in need to develop the high-performance ion conducting membrane and electrolyte. This report will focus on the latest progress of high-performance porous non-perfluorinated ion conducting membrane for application on vanadium flow battery.

Biography:

Muhammad Wakil Shahzad is working as a Research Scientist in the Water Desalination and Reuse Center of King Abdullah University of Science and Technology. He worked as Research Fellow in the National University Singapore (NUS) in 2014 and as a lecturer at UET (Pakistan) from 2008-2009. He is working on thermal systems for cooling and desalination and their hybridization such as; Multi-effect Desalination, Adsorption Cycle and Desiccant Dehumidifier for overall system performance improvements. He is also working on economic analysis of single purpose and cogeneration systems. They developed a model for primary fuel cost apportionment in dual-purpose plants based on energy analysis that is widely accepted in the industry. He also has expertise on complex system modelling and simulation. Dr. Wakil holds three international patents on hybrid cycles for desalination and cooling. To date, he published 18 peer-reviewed journal papers and 50 conference papers. Their innovative hybrid MED+AD cycle won “GE-ARAMCO global water challenge” award 2015 for high efficiency and lowest water production cycle <$0.5/m³. He also received two best paper awards in international conferences. He is selected as a regional coordinator for International Desalination Association Young Leader Program (IDA-YLP) for Middle East & Africa region for 2015-2017.

Abstract:

The economics of seawater desalination processes has been continuously improving because of desalination market expansion. Lower operating cost has been achieved by efficient operation strategies and better recoveries and the capital investment dropped many folds due to competent system designs and material development. Presently, reverse osmosis (RO) processes are leading in global desalination with 53% share followed by thermally driven technologies 33%, but in GCC their shares are 42% and 56% respectively due to severe feed water quality. In RO processes, intake, pretreatment and brine disposal cost 25% of total desalination cost at 40-45% recovery. We presented a tri-hybrid system to enhance recovery from RO retentate up to 85%. The proposed hybrid desalination cycle consist of two major systems, RO process and multi-evaporator adsorption system (ME-AD). They are arranged in series for maximum recovery from pre-treated feed. The conditioned brine leaving from RO system supplied to proposed multi-evaporator adsorption cycle driven by low temperature heat source such as solar energy or industrial waste heat. Detailed mathematical model of overall system (from one to four-evaporator adsorption cycle) is developed and simulation has been conducted in FORTRAN. The final brine reject concentration from tri-hybrid cycle can be increased from 166ppt to 222ppt if RO retentate concentration varies from 45ppt to 60ppt. The proposed tri-hybrid cycle is the highest recovery, 85%, and lowest specific water cost, 2.20 kWh/m3, reported in the literature up till now.The detailed process schematic of hybrid system is shown in Figure 1.

Figure 1: Membrane & thermal distillation hybrid processes flow schematic.

Biography:

Hyunchul OH is an Assistant Professor in the Department of Energy Engineering at GNTECH. He obtained his PhD at Max Planck Institute (MPI), Germany. He worked as a postdoctoral research fellow and associated research fellow at MPI-IS and the KISTEP(Korea Institute of S&T Evaluation & Planning). His current research interests are gas storage and light gas isotope separation using microporous materials.

Abstract:

Separating gaseous mixtures that consist of very similar particles (such as mixture of light gas isotopes) is one of the challenges in modern separation technology. Especially hydrogen isotoepe separation is a difficult task since its size, shape and thermodynamic properties share each other. Hydrogen isotope mixtures can be effectively separated either by confinement in small pores [i.e., “kinetic quantum sieving” (KQS)] or by strong adsorption sites [i.e., “chemical affinity quantum sieving” (CAQS)] on porous materials. MOFs are excellent candidates for study of these quantum effects, due to their well-defined, tunable pore structures and the potential to introduce strong adsorption sites directly into the framework structure. In this talk, the feasibility of MOFs as isotope sieves is outlined through the experimental results obtained by low-pressure high-resolution isotherms and cryogenic thermal desorption spectroscopy (TDS) directly on isotope mixtures. Firstly, different porous frameworks have been investigated to establish a fundamental correlation between selectivity and pore diameter at optimized operating conditions. Afterwards, two strategies for satisfying industrial requirements are introduced. Firstly, the operating pressure is increased by introducing cryogenically flexible pore aperture. Secondly, the operating temperature is increased by utilizing the different chemical affinity of isotopes on strong adsorption sites. Finally, the deuterium enrichment process is experimentally demonstrated by applying a temperature swing adsorption process.

Biography:

Andrzej Kubaczka has earned his M.Sc. and Ph.D. degree in Chemical Engineering from Silesian Technical University, Gliwice Poland. He worked as a researcher in the Institute of Chemical Processing of Coal, Poland where he investigated mass transfer in the process of flash coal pyrolysis in the fluidized bed reactor. The subject of his postdoctoral research in the Institute of Chemical Engineering of Polish Academy of Sciences was multicomponent mass transfer in membrane processes. He published over a dozen articles in international and several dozen in national scientific journals, also many articles in the proceedings of national and international conferences. Nowadays, he is an assistant professor in the Department of Process Engineering for the Faculty of Natural Sciences and Technology, Opole University. His present research interest is modelling of mass transport in membrane processes.

Abstract:

Pervaporation is the process that actually in the world industry is applied in majority to dehydration of organic solvents. Most generally, the mass fluxes in the pervaporation process are a function of all mass transport resistances occurring in the mass transport path. The membrane is the heart of pervaporation process and from its permeation properties depends the yield and selectivity of the process. Depending on the construction of pervaporation unit, some other mass transfer resistances can be neglected. The majority of the methods of calculation the mass fluxes in the polymer membranes based on the generalized Fick's equation, while for calculation of mass fluxes in fluid systems the generalized Maxwell-Stefan equations (GMSE) is preferably used. Recently Kubaczka proposed the method that allows prediction Maxwell-Stefan diffusion coefficients (MSD) in the membrane space for multicomponent systems using self-diffusion coefficients and binary diffusion coefficients for infinitely diluted mixtures. The purpose of this study is the test of an accuracy of the prediction of mass fluxes in the pervaporation process based on GMSE where MSD are predicted according to the proposed method. These calculations have been done for the experimental results of pervaporation of the isopropanol-water and ethanol-water mixtures in the poly (vinyl alcohol) membrane. These data were the results of the experiments conducting on the PERVAP 2210 hydrophilic membrane. The self-diffusion coefficients, which are the most important element of analyzed method, were predicted using formulas derived from the free-volume theory by Vrentas and Vrentas . The equilibrium concentrations on both sides of the separating polymer film were computed using UNIFAC-FV method with FV element modified according to the model of Kannan et al. The comparison of calculated and experimental results shows very good agreement between experimental and predicted data. The influences of free volume parameters on the mass fluxes are also analyzed.

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Figure 1: Comparison of the predicted and experimental mass frictions of water [Kg/Kg] in the permeate

Publications

1. Lipnizki F. and Trägårdh G. (2001) Modelling of pervaporation: Models to analyze and predict the mass transport in pervaporation. Separation and Purification Methods 30(1):49-125.
2.  Shao P., Huang R.Y.M. (2007) Polymeric membrane pervaporation. Journal of Membrane Science 287: 162-179.
3. Kubaczka A. (2014) Prediction of Maxwell–Stefan diffusion coefficients in polymer - multicomponent fluid systems, Journal of Membrane Science 470: 389-398.
4. Vrentas J.S., Vrentas Ch.M. (1998) Predictive Methods for Self-Diffusion and Mutual Diffusion Coefficients in Polymer-Solvent Systems, Eur. Polym. J. 34:797-803.
5. Kannan D.C., Duda J.L., Danner R.P. (2005) A free-volume term based on the van der Waals partition function for the UNIFAC model. Fluid Phase Equilibria. 228-229:  321-328.

Biography:

Pengrui Jin has completed his Bachelor at the age of 23 years from Chongqing University of technology and he is doing his masters at Chongqing University School of Resources and Environmental Science. He has published two papers in reputed journals.

Abstract:

In the present work, we studied the simultaneous separation of H₂S and CO₂ from biogas by gas-liquid membrane contactor using single and mixed absorbents. The synthetic biogas contained 300 to 900 ppm H₂S, 30% to 50% CO₂ and CH₄. In order to gain a better understanding on the role of different absorbents on simultaneous separation of H₂S and CO₂ from biogas, water, monoethanolamine (MEA, primary amine), potassium carbonate (K₂CO_3, inorganic salt), Potassium hydroxide (KOH, inorganic salt), potassium glycinate (PG, organic salt), potassium sarcosine (PS, organic salt), potassium L-proline (PLP, organic salt) were applied as absorbent solutions. Poly (vinylidene fluoride) (PVDF) hollow fibre membrane was used in the membrane contactor modules. The performances of both single and mixed solutions on H2S and CO2 simultaneous absorption capacity were investigated. In addition, the effects of liquid and gas velocities, absorbent concentration and acid gas content of the feed, pressure, on the absorption performance, overall mass transfer coefficients and selectivity of H₂S were investigated.

The results indicate that the use of K₂CO₃ and KOH as absorbents gave highest H₂S flux, and the highest CO₂ flux was obtained using PG as the absorbent. The use of mixed solutions can simultaneously improve the absorption flux of H₂S and CO₂. The results of H₂S selectivity showed that liquid side resistance is negligible in comparison with membrane and gas side resistances for H₂S absorption. On the contrary, liquid phase resistance controlled the mass transfer for the mass transfer of CO₂. For the partially wetted mode, the wetted membrane resistance was insignificant and gas phase resistance controlled the mass transfer.

Biography:

Mahmoud A. Abdulhamid is a PhD student at King Abdullah University of Science and technology (KAUST) located in Saudi Arabia at the shore of the Red sea. Mahmoud earned his Bachelor and master’s degrees from the Lebanese University in Organic and Polymer chemistry; he did his master’s thesis in France, university of Pau where he worked on an industrial project for six month to modify the natural polymers by green chemistry. Mahmoud has been working on his PhD thesis entitled Structure-property relationship for membrane-based polyimides, where he synthesizes monomers and then making different type of polymers and test for gas separation. Mahmoud is an inventor on one US patent application and co-inventor on other two applications.

Abstract:

Three novel polyimides were synthesized from a 9,10-dimethyl-2,6(7)-diaminotriptycene (T) with a commercially available bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylic dianhydride (BC) and its halogenated derivatives. The non-halogenated T-BC polyimide derivative was made as a reference material to evaluate the effect of the halogen groups in T-BCCl₄ and T-BCBr₄ on its gas transport properties. Pure-gas permeability coefficients of He, H₂, N₂, O₂, CH₄, and CO₂ were measured at 35 °C and 2 atm. The BET surface area based on nitrogen adsorption at 77 K of T-BC was 570 m² g^-1 while those of tetrachloro-functionalized T-BCCl₄ and tetrabromo-functionalized polyimide T-BCBr₄ were reduced significantly to 340 and 30 m² g^-1, respectively. The decrease in BET surface area in the halogenated polyimides resulted from reduction in their pore volumes relative to that of T-BC due to occupation of free volume space by the halogens. The freshly prepared T-BC membrane had a pure-gas O₂ permeability of 66 Barrer and O₂/N₂ selectivity of five. The permeability decreased significantly by replacing the hydrogen groups by the chloro- or bromo groups in the cycloaliphatic dianhydride building block. For example, the permeability of O₂ decreased by 3-fold from 66 in T-BC to 20 Barrer in T-BCBr₄, while the permeability of nitrogen was reduced from 13 to 3.4 Barrer. As expected for lower permeability polymers, the O₂/N₂ selectivity increased concurrently from 5 in T-BC to 6 in T-BCBr₄. Long-term testing over 365 days resulted in only ~ 15% loss in gas permeability’s and without significant changes in selectivity’s, which demonstrated that these polyimides were resistant to physical aging. These combined results suggest that BC-based polyimides are promising candidate membrane materials for gas separation applications.

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Publications

1. Matsumoto, T. and T. Kurosaki, Soluble and Colorless Polyimides from Bicyclo[2.2.2]octane-2,3,5,6-tetracarboxylic 2,3:5,6-Dianhydrides. Macromolecules, 1997. 30(4): p. 993-1000.
2. Chun, B.-w., Preparation and characterization of organic-soluble optically transparent polyimides from alicyclic dianhydride, bicyclo[2.2.2]-oct-7-ene-2,3,5,6-tetracarboxylic dianhydride. Polymer, 1994. 35(19): p. 4203-4208.
3. Liu, J.G., et al., Organosoluble and transparent polyimides derived from alicyclic dianhydride and aromatic diamines. Journal of Polymer Science Part A: Polymer Chemistry, 2002. 40(1): p. 110-119.
4. Ma, X., et al., Novel Spirobifluorene- and Dibromospirobifluorene-Based Polyimides of Intrinsic Microporosity for Gas Separation Applications. Macromolecules, 2013. 46(24): p. 9618-9624.
5. Pascoe, E.V. and I.I. Harruna, Synthesis and characterization of high temperature polyimides from bicyclic dianhydrides. Journal of Macromolecular Science, Part A, 2003. 40(9): p. 915-932.

Biography:

Dina Shokry had her Bachelor degree in Pharmacy in 2009 from Ain Shams University then completed her Master’s degree in Analytical Chemistry from Cairo University in 2013. Now she is about to finish her PhD as a member of Dr Waters group for finding alternatives to animal testing at Huddersfield University. She worked as a teaching assistant then as an assistant lecturer of Analytical Chemistry at Future University. She produced high quality research that was published in a number of reputed peer reviewed journals. She presented her work in nine conferences. Dina’s work is focused on developing models for prediction of human intestinal absorption through in vitro-in vivo correlation studies, which has economic impact in the pharmaceutical industry field. She developed prediction models from MLC, solubilization and permeation studies where the obtained in vitro data correlated well with the in vivo absorption data and resulted in two recently published papers.

Abstract:

Estimation of human intestinal absorption is very important especially for orally administered pharmaceutical compounds with poor solubility. Therefore, in preformulation studies the extent of drug absorption must be determined for new drug entities (NDE). The use of animals has been the most abundant method used in preformulation studies for determination of pharmacokinetics, especially the rate and extent of intestinal absorption of pharmaceutical compounds. In this work, using the biodetergent-based micellisation with a form of chromatography known as Micellar Liquid Chromatography and the use of the solubilizing capacity of these biodetergents and its determination using UV-spectrophotometry were found to be successful in the prediction of human intestinal absorption. Bile salts were used as a mobile phase in the MLC chromatographic method to provide an environment more closely simulating the human intestinal environment. In this method, intestinal absorption was successfully predicted by the use of a group of model compounds through measurement and calculation of the partition coefficient, P_mw. While in the spectrophotometric method the solubilizing effect of one bile salt was quantified and used in the calculation of the partition coefficients (log K_xm/a) of a number of model drugs which were then used in the construction of a statistical model for the prediction of human intestinal absorption. Another method used for prediction of human intestinal absorption was a permeation method using flow through or Franz cells using drug-sodium deoxycholate based polymer where the permeability constant K_p was obtained for number of drugs and used in statistical modelling of human intestinal absorption.

Biography:

Emese Pálovics graduated from the University of Technology “Traian Vuia” of Timisoara in 1990 as a chemical engineer. Since 1994, she has been a scientific assistant at the Budapest University of Technology and Economics in a research group of the Hungarian Academy of Sciences at the Department of Organic Chemical Technology working on crown ethers and organophosphorus compounds. Since 2004, she has been working with Prof. Elemér Fogassy as senior research fellow, in the field of optical resolution. She earned her PhD in 2009, which studied structurally related compounds with common skeleton in the resolution processes. She is the co-author of 45 papers (the majority of which appeared in international journals), and three patents.

Abstract:

Based on our and others experimental observations we can declare that the distribution between two phases of enantiomeric- and diastereomeric mixtures can be identical (in melt-solid, solution-solid, solid-gas, liquid- liquid phases). The stoichiometry of distribution of enantiomers and diastereomers between phases is determined by the eutectic composition of enantiomeric mixtures of chiral compounds present in the mixture. The distribution of chiral compounds can be different in different solvents. According to the kinetic or thermodynamic control the composition of phases may change during the distribution (i.e. crystallization time) in the same solvent. The molecules in solution (not in solid state) form polymers, associates having P and M helicity, forming double helices (with parallel and antiparallel arrangement). Thus, mirror-image crystals will be formed during the crystallization. Crystals precipitating from the supramolecular associates having P and M helicity formed according to the self-disproportionation (SDE) of chiral compounds are crystallizing in the ratio of the eutectic composition (ee_Eu) of chiral compounds.  Diastereomeric mixtures are separated when the mixture has no mirror-image relation. In this case, the ratio of mirror-image compounds will correlate with the eutectic composition of one of the chiral molecules present in the mixture. The solvent and the time (time of the distribution, time of crystallization) will determine that which one of the chiral compounds will influence the composition of the diastereomeric According to these principles, we have proposed a possible mechanism for distribution of enantiomeric and diastereomeric mixtures , justified by our earlier and recent experimental results.

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Biography:

Dong-Qiang Lin has completed his PhD in 1997 from Zhejiang University, China. Since 1998, he work for Zhejiang University, and became a professor in 2007. Now he is the director of the Institute of Bioengineering, Zhejiang University. He has published more than 100 peer-reviewed papers in international journals and three books, and was authorized 32 patents. In recent year he focused on novel bioseparation technology, separation materials, computer simulation and bioprocess design.

Abstract:

Expanded-bed adsorption (EBA) was developed as an innovative technology to capture target proteins directly from unclarified feedstock. Mixed-mode chromatography (MMC) is a novel technology for bioproduct separation, which combines multiple binding modes to improve the adsorption selectivity. Two chromatographic techniques, EBA and MMC, can be integrated into one new unit, mixed-mode EBA, improving the process efficiency of protein capture and reducing the pretreatments on the feedstock, such as clarification, dilution and salt-adjustment. In the present work MMC ligands were coupled onto several matrices for EBA. The static adsorption, adsorption kinetics and dynamic binding were investigated, and the effects of pH and salt addition were evaluated. New technology was verified with two typical processes, monoclonal antibody (mAb) capture from CHO cell culture broth and recombinant human albumin serum (rHSA) isolation from Pichia pastoris fermentation broth. High separation efficiency was obtained. For biopharmaceuticals downstream processes require highly productive and robust technologies to improve the process efficiency. The combination of EBA and MMC has been demonstrated to be a promising new platform for protein capture with reduced feedstock pretreatments, high efficiency and relative low cost, which can be expanded to other bioproduct separation. This work was supported by the International Science & Technology Cooperation Program of China and National Natural Science Foundation of China.

Biography:

Deanna Mulvihill has her expertise in evaluation and passion in improving the health and wellbeing. HerOpen and contextual evaluation model based on responsive constructivists creates new pathways for improving healthcare. She has built this model after years of experience in research, evaluation, teaching and administration both in hospital and education institutions. The foundation is based on fourthGeneration evaluation (Guba& Lincoln, 1989) which is a methodology that utilizes the previous Generations of evaluation: measurement, description and judgment. It allows for value-pluralism. This Approach is responsive to all stakeholders and has a different way of focusing.

Abstract:

Statement of the Problem: Women who have experienced intimate partnerviolence (IPV) are at greater risk for physical and mental health problems including posttraumatic stress disorder (PTSD) and alcohol dependency. On their own IPV, PTSD and alcohol dependency result   in significant personal, social and economic cost and the impact of all three may compound these costs. Researchers have reported that women with these experiences are more difficult to treat; many do not access treatment and those who do, frequently do not stay because of difficulty maintaining helping relationships. However, these women’s perspective has not been previously studied. The purpose of this study is to describe the experience of seeking help for alcohol dependency by women with PTSD and a history of IPV in the context in which it occurs. Methodology & Theoretical Orientation: An inter subjective ethnographic study using hermeneutic dialogue was utilized during participant observation, in- depth interviews and focus groups. An ecological framework was utilized to focus on the interaction between the counselors and the staff to understand this relationships and the context in which it occurs. Findings: The women in this study were very active help seekers. They encountered many gaps in continuity of care including discharge because of relapse. Although the treatment center was a warm, healing and spiritual place, the women left the center without treatment for their trauma needs   and many without any referral to address these outstanding issues. Conclusion & Significance: Women with alcohol dependence and PTSD with a history of IPV want help however the health and social services do not always recognize their calls for help or their symptoms of distress. Recommendations are made for treatment centers to become trauma- informed that would help this recognition.

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Publications

1. Harper C (2009) The neuropathology of alcohol-related braindamage. Alcohol Alcohol 44:136-140.
2. Heilig M, Egli M (2006) Pharmacological treatment of alcohol dependence: Target symptoms and target mechanisms. Pharmacology and therapeutics 111:855-876.
3. LiX, SchwachaMG, ChaudryIH, ChoudhryMA (2008)Acutealcohol intoxication potentiates neutrophil-mediated intestinal tissue damage after burn injury. Shock 29:377.
4. Room R, BaborT, Rehm J (2005) Alcohol and public health. Lancet

365: 519-530.

5. Sullivan EV, Zahr NM (2008) Neuroinflammation as a neurotoxic mechanism in  alcoholism:  Commentary  on  “Increased  MCP-    1 and microglia in various regions of human alcoholic brain”. Experimental neurology 213:10-17.

Biography:

Jarintzi Rico has completed her Master at the age of 26 years from CICATA-IPN-Querétaro. She is instrumental methods analyst at Euro-Nutec Premix S A de CV, Queretaro Mexico.

Abstract:

In recent years because of increasing resistance and regulations on the use of antibiotics in animal feed, plant extracts have gained a lot of attention as an effective substitute to antibiotic growth promoters in animal nutrition. Researchers are very much interested in extracts of turmeric, capsicum, cinnamon among others because of their antimicrobial properties as reported in different in vitro studies. In order to have a specific effect, is of great importance to know the concentration of the raw materials. The aim of the study was to develop and validate an efficient and effective RP-UPLC method for quantification of different capsaicinoids (Nordihydrocapsaicin-NDHC, Capsaicin-CAP and Dihydrocapsaicin-DHC) from different microencapsulated samples. The ultrasonic extraction method was used for the extraction of these compounds. The reverse-phase UHPLC-MS analysis was carried out using an Acquity UPLC BEH C18 1.7 μm (2.1x50 mm) column and a mobile phase comprising of water-acetonitrile (57:43, v/v) both acidulated with formic acid 0.1% at a flow rate of 0.4 ml/min. The detection and quantitation of NDHC, CAP and DHC were carried out at 294, 306 and 308 Daltons respectively on the mass detector. The limits of detection (LOD) were 45, 115 and 55ng/ml for NDHC, CAP and DHC, respectively. Detector response was found to be linear from 100 to 2500, 400-4000 and 100 to 3500 ng/ml for NDHC, CAP and DHC respectively. The present method provides an efficient, accurate and highly reproducible method for quantification of different capsaicinoids in different microencapsulated samples and oleoresins.

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Figure 1. Chromatogram of capsaicin analysis by RP-UPLC-QDa

 Publication

1. Rico J, et al. (2016). An innovative method for the extraction and quantification of curcuminoids from a complex matrix. Chem Sci J 2016, 7:2 (Suppl).

Biography:

Xin-Xiang ZHANG  has been working in the field of capillary electrophoresis for over 20 years. He has founded a serious high sensitive determination of small bioactive compounds by CE combined with affinity extraction procedures. The improvement and application of sheathless interface for CE-MS is focus of his research in recent years. With the new designed labelling reagents, the glycan profiling especially the differential glycan profiling can be achieved by CE-MS and/or LC-MS.

Abstract:

Labelling strategy plays an important role in mass spectrometry (MS) based glycan analysis due to the high  hydrophilicity and low ionizationefficiency of glycans. We designed ten hydrazino-s-triazine based labelling reagents were synthesized under facile and controllable conditions for highly sensitive LC or CE–electrospray MS. Attached to N-glycans through non-reductive reactions, these new labelling reagents were evaluated in differently enhanced glycan response to MS. Three of them demonstrated to be reliable and remarkable for glycan analysis with satisfactory linearity and lowered limits of detection using maltoheptaose(DP7) as model. An innovative stable-isotope relative quantification strategy for N-glycans was achieved using these non-reductive hydrazino-s-triazine deuterated derivative as a labelling reagent combined with MS also. As much as a 20 Da mass shift could effectively distinguish different forms of Nglycans labelled with normal and heavy hydrazino-s-triazine at the reducing end.  Especially for glycans with high molecular weight, qualitative identification could be significantly simplified on account of avoiding isotopic distributions overlapping in LC-MS or CE-MS. Furthermore, the most optimal labelling reagent was taken as an example for highly sensitive profiling of N-linked glycans both cleaved from chicken avidin and glyco- proteins in human serum, indicating prospective availability for these labelling reagents in frontier of glycomics researches. These reagents have been applied in the determination of trace amount of organic acids in environmental samples with highly sensitivity also.

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Recent Publications

1.  Zhang YW, Zhu J Yin H, Marrero J, Zhang X-X, Lubman D.M, (2015)    ESI-LC-MS Method for Haptoglobin Fucosylation Analysis in Hepatocellular Carcinoma and Liver Cirrhosis, J PROTEOME RESEARCH, 14  (12): 5388-5395
2. Chen Z, Zhong X, Tie C, Chen BM, Zhang X-X, Li L, (2017) Development of a hydrophilic interaction liquid chromatography coupled with MALDI-mass spectrometric imaging platformfor N-glycan relative quantitation using stable-isotope labeled hydrazide reagents, Anal and Bioanal Chem,  in printing, DOI 10.1007/s00216-017-0387-6

3. Zhao M-Z, Zhang YW, Yuan F, Deng Y, Liu JX, Zhou YL, Zhang X-X, (2015) Hydrazino-s-triazine based labelling reagents for highly sensitive glycan analysis via liquid chromatography-electrospray mass spectrometry , TALANTA 144:992-997                
4. Zhang YW, Zhao M-Z, Liu JX, Zhou YL, Zhang X-X, (2015)            Double-layer poly(vinyl alcohol)-coated capillary for highly sensitive and stable capillary electrophoresis and capillary electrophoresis with mass spectrometry glycan analysis, J. Sep Sci, 38:475-482
5. Zhao M-Z, Tie C, Zhang YW, Deng Y, Zhang FT,  Zhou YL, Zhang X-X, (2015)  Deuterated hydrazino-s-triazine as highly-efficient labelling reagent for glycan relative quantification analysis using electrospray ionization mass spectrometry, RSC ADVANCES 5:79317-79322                            
6. Liu JX, Zhang YW, Yuan F, Chen H-X, Zhou YL, Zhang X-X, (2014) Differential detection of Rhizoma coptidis by capillary electrophoresis electrospray ionization mass spectrometry with a nanospray interface  ELECTROPHORESIS, 35:21-22
7. Tie C, Hu T, Zhang X-X, Zhou J, Zhang J-L, (2014)  HPLC-MRM relative quantification analysis of fatty acids based on a novel derivatization strategy ANALYST, 19:6154-6159                        
8. Zhang YW,  Li Z, Zhao Q, Zhou YL, Liu HW, Zhang X-X(2014) A facilely synthesized amino-functionalized metal-organic framework for highly specific and efficient enrichment of glycopeptides     CHEMICAL COMMUNICATIONS 50:10504-10506
9. Liu JX, Zhao MZ, Deng Y, Tie C,  Chen H-X, Zhou YL, Zhang X-X, (2014)  The coating of smart pH-responsive polyelectrolyte brushes in capillary and its application in CE  ELECTROPHORESIS 34:1352-1358                                                             
10. Tie C, Zhang X-X, A new labelling reagent for glycans analysis by capillary electrophoresis-mass spectrometry  ANALYTICAL METHODS 4:357-359     

Biography:

Karel Procházka is a Professor and Head of “Soft Matter” research group (earlier “Laboratory of Specialty Polymers”) at the Department of Physical and Macromolecular Chemistry of the Charles University in Prague. He is a member of the American Chemical Society, Czech Chemical Society and the Czech Learned Society. He has been studying the Conformational and Self-assembling Behavior of Block Copolymers and Polyelectrolytes by a number of experimental techniques, such as Light Scattering, Small Angle Neutron and X-Ray Scattering, Spectroscopy, Size-Exclusion Chromatography, Ultracentrifugation, Colorimetry and Microscopy in combination with Computer Modeling (Monte Carlo simulations, Molecular Dynamics and Self-Consistent Field Calculations). He published more than 150 original publications in recognized impacted journals. His publications are highly cited by other authors (more than 2500 citations by other authors), and contributed to the broadening of the knowledge on the Stimuli-Responsive Self-Assembling Polymer Systems.

Abstract:

The general principles of chromatographic separation of mixtures of linear and branched polymers were studied by Monte Carlo simulations. The study focuses on the conditions relevant for experimental chromatography, i.e., on the partitioning of fairly dilute solutions between bulk solution and mildly sterically confined pores. The polymer chains were modeled as self-avoiding walks either in a good or in theta solvent. The partition coefficient of branched chains (K_B) is higher than the partition coefficient of linear chains (K_L) in pores with non-attractive walls and the difference between both coefficients evaluated in mixtures of polymers with different chain architectures exceeds that based on values for single chain systems. However, it decreases with increasing adsorption strength of chains on pore walls, i.e., with increasing attractive interaction between pore walls and polymer structural units, |ε|. For ε ca. -0.18, the partition coefficients equal (K_L = K_B) and later their sequence inverts. Evaluation of concentration profiles and structural characteristics of the chains at different distances from the wall reveals that more deformable linear polymers preferentially accumulate close to the attractive walls and orient parallel with the wall. The study shows that the stationary phase in neat size exclusion chromatography has to be optimized from the physico-chemical point of view, because the separation efficiency can be significantly deteriorated by its improper choice. However, the combination of size exclusion and interaction chromatography can be used for analysis of complex systems (e.g., mixtures of polymers and copolymers) when it is desirable to suppress the separation with respect to some molecular characteristics and separate the components differing in other characteristics. E.g., the combined chromatographic technique can be employed for the analysis of block copolymers because the separation can be tuned and focused on structural features of one of blocks only.

Image

Figure 1: Schematic illustration of the simulation box. Insert shows one of studied branched structures.

Publications

1. Wang X, Lísal M, Procházka K, Limpouchová Z (2016) A Monte Carlo study of H-shaped and linear homopolymers in good solvent. Macromolecules 49: 1093-1102.
2. Posel Z, Limpouchová Z, Šindelka K,  Lísal M, Procházka K (2014) Dissipative particle dynamics study of the pH-dependent behavior of poly(2-vynilpyridine)-block-poly(ethylene oxide) diblock copolymer in aqueous buffers. Macromolecules 47: 2503-2514.
3. Šindelka K, Limpouchová Z, Lísal M., Procházka K (2014) Dissipative particle dynamics study of electrostatic self-assembly in aqueous mixtures of copolymers containing one neutral water-soluble and one either positively or negatively charged polyelectrolyte block. Macromolecules 47: 6121-6134.

4. Lísal M, Limpouchová Z, Procházka K (2016) The self-assembly of copolymers with one hydrophobic and one polyelectrolyte block in aqueous media. Physical Chemistry Chemical Physics 18:  16127-16136.
5.  Šindelka K, Limpouchová Z, Lísal M., Procházka K (2016) The electrostatic co-assembly in non-stoichiometric mixtures of copolymers composed of one neutral and one polyelectrolyte (either positively or negatively)charged) block: A dissipative particle dynamics study. Physical Chemistry Chemical Physics 18: 16137-16147.
6. Wang X., Limpouchová Z, Procházka K (2016) Computer study of chromatographic separation of mixtures of H-shaped and linear polymers in good and theta solvents. Polymer 104: 10-21.
7. Netopilík M, Janata M, Svitáková R, Trhlíková O, Berek D, Malcova E, Limpouchová Z, Procházka K (2016) Chromatographic study of the conformational behavior of grafts copolymers with a broad distribution of grafting densities in dilute solutions in selective solvents for grafts. Journal of Liquid Chromatography and Related Technologies 39: 50-58.

Biography:

David Chiche did PhD in materials science from Pierre et Marie Curie University (Paris, France). He has been working in the Separation Department at IFP Energies Nouvelles for 10 years. His expertise was developed in the field of Synthesis Gas and Natural Gas Purification Technologies, especially in relation with the Development of Metal Oxides Adsorbents, Catalysts and related processes.

Abstract:

Natural gases are commonly polluted with many contaminants such as sulfur compounds and CO2. Throughout the oil and gas treatment chain, various steps intended to separate most of the undesired compounds from the profitable part of the natural gas. Natural gas desulfurization is usually performed in generic treatment processes and in order to remove H2S and/or CO2 to meet the export gas specifications. However, commercial gas specifications are not restricted to H2S and CO2. New specifications have been imposed for many years to also remove most of other sulfur compounds from the natural gas. One of these, Carbonyl Sulfide (COS) is usually present in sour natural gases containing both H2S and CO2, in quantities which may exceed 200 vol. ppm. COSWEET^TM process, developed for the treatment of COS containing natural gases, is based on a combination of deacidification through any alkanolamine solution with a COS hydrolysis section over on a metal oxide based catalyst. Nearly complete COS conversion is reached, even at a relatively low operating temperature. Coupled with a classical sweetening unit, in which an adapted alkanolamine solvent is used in order to optimize the removal of H2S, CO2, as well as the H2S/CO2 selectivity, the high catalyst activity and the original integration of the scheme secure the COS removal at minimum extra cost. Benefits of capital and operating expenditures of the plant result both from the reduction of the absorption column and solvent flow rate and from the quality of the acid gas, which has positive consequences on the design of the sulfur recovery facilities units, including Claus unit.The approach set for the process development and the results obtained on COS conversion will be presented, as well as the model and simulation tool, and a case study showing the advantages of coupling COSWEET^TM to amine-based solvent.

Image

COSWEET^TM Process scheme

Publications

1. J. Magné-Drisch, J. Gazarian, S. Gonnard, J.M. Schweitzer, D. Chiche, G. Laborie, G. Perdu, COSWEET^TM: A New Process to Reach Very High COS Specification on Natural Gas Treatment Combined with Selective H₂S Removal, Oil Gas Sci Technol, 2016, 71, 40.
2. D. Chiche, J.M. Schweitzer, Investigation of competitive COS and HCN hydrolysis reactions upon an industrial catalyst: Langmuir-Hinshelwood kinetics modeling, Appl Catal B-Environ, 2017, 205, 189-200.
3. D. Chiche, C. Diverchy, A.-C. Lucquin, F. Porcheron, F. Defoort, Synthesis Gas Purification, Oil Gas Sci Technol, 2013, 68(4), 707-723.
4. V. Girard, D. Chiche, A. Baudot, D. Bazer-Bachi, I. Clémençon, F. Moreau, C. Geantet, Innovative low temperature regenerable zinc based mixed oxide sorbents for synthesis gas desulfurization, Fuel, 2015, 140, 453-461.
5. L. Neveux, D. Chiche, J. Perez-Pellitero, L. Favergeon, A.S. Gay, M. Pijolat, New insight into the ZnO sulfidation reaction: mechanism and kinetics modeling of the ZnS outward growth, Phys Chem Chem Phys, 2013, 15, 1532-1545.

Biography:

Danielle Barth contributes to develop Supercritical carbon dioxide processes (continuous and batch extraction, prep-scale supercritical fluid chromatography, drying, dying, VOC desorption, Chemical reactions (like Staudinger Aza-Wittig), Enzymatic reactions (with lipase) at pilot-scale and laboratory-scale since thirty years.

Abstract:

In supercritical CO₂ extraction process, there are two essential steps: the extraction step in the extractor where the SC-CO₂ allows the solvent removal from product structure and the separation step which consists of the separation of CO₂-solvents in a cascade of cyclone separators downstream the extractor. Cyclone separators are separation devices that use the centrifugal and gravity forces to remove liquid phase from flue gases. Two supercritical extraction processes are studied here: organogels supercritical drying for aerogels production and supercritical extraction of polar compounds from natural products. Concerning the first process, the organogel is prepared by an aminoacid-type organogelator with aromatic solvents such as tetralin or toluene. The experimental results showed a good solvent recovery rate in the case of tetralin, exceeding 90% but an unsatisfactory separation for toluene with a yield below 65%. In order to understand the experimental results, a thermodynamic study and a hydrodynamic study (CFD) of the mixture separation in the cyclones are carried out. Supercritical extraction of polar compounds from natural products using a CO₂ + aqueous ethanol mixture as solvent requires a reliable knowledge of vapor-liquid equilibria of the carbon dioxide + ethanol + water system in order to size and optimize the extraction process. The purpose of this study is to select an appropriate thermodynamic model among the ones available in commercial process simulators for representing the phase behaviour of the system of interest. This study highlighted that the optimal thermodynamic models for the application of interest have to be chosen among the VTPR, PSRK and MHV2-UNIFAC EoS. Once identified a suitable thermodynamic model for the CO₂ + ethanol + water ternary system, it has been possible then to simulate the extraction process of polar compounds from natural products and to discuss how water influences the process efficiency.

Image

Figure 1: Simplified scheme of supercritical extraction

Publications

1. Bensebia O, Bensebia B, Allia K, Barth D (2016) Supercritical CO₂ extraction of triterpenes from rosemary leaves: Kinetics and modelling. Separation Science and Technology 51,13: 2174-2182
2. Lazrag M, Mejia-Mendez DL, Lemaitre C, Emmanuel Stafford PH, Hreiz R, Privat R, Hannachi A, Barth D (2016) Thermodynamic and hydrodynamic study of a gas-liquid flow in a cyclone separator downstream supercritical drying. J Supercrit Fluids 118:27–38
3. Jamart-Grégoire B, Son S, Allix F, Felix V, Barth D, Pickaert G, Degiovanni D (2016) Monolithic organic aerogels derived from single amino-acid based supramolecular gels: physical and thermal properties. RSC Adv 6:102198–102205
4. Lazrag M, Steiner E, Lemaitre C, Mutelet F, Privat R, Rode S, Hannachi A, Barth D (2017) Experimental and thermodynamic comparison of the separation of CO₂/toluene and CO₂/tetralin mixtures in the process of organogel supercritical drying for aerogels production, J Sol-Gel Sci Technol
5. Ravetti Duran R, Escudero Falsetti P, Muhr L, Privat R, Barth D, Phase equilibrium study of the ternary system CO₂+H₂O+Ethanol at elevated pressure for the supercritical extraction of polar compounds from natural products, 16th European Meeting on Supercritical Fluids 25-28 April 2017 Lisbon

Biography:

Margaret C Enedoh has completed her PhD from University of Abuja Nigeria. She is a lecturer in Imo State University Owerri, Nigeria. She is a member of National Science Teachers of America and America Chemical Society and back home belongs to Chemical Society of Nigeria and is currently the coordinator of Female Chemists in Imo state Nigeria. She is a staunch member of Science Teachers Association of Nigeria (STAN) and the national chairperson of the chemistry panel of STAN. She organizes and coordinates national chemistry workshops yearly. She is highly interested in scientific research works.

Abstract:

Extraction of oil from palm kernel nut was carried out using two local methods practiced in the Eastern part of Nigeria in Africa – Mechanical extraction and Solvent extraction. The palm kernel nuts were cracked and the kernel – shell separation done by density – clay – bath. Using mechanical extraction, the nuts were cleaned by pre-treatment, followed by size reduction through grinding, then, flaking and steam conditioning. The resultant meals were passed through mechanical stirring agitator and then subjected to screw-press which forced the meals through the barrels in series till oil drained out through perforated bars while the solid-cake discharged through the annular orifice. In solvent extraction the kernel nuts after pre-treatment were dried, ground to paste, mixed with little water and heated to release the oil which surged out from the paste and remain on top and was scooped out. The oils obtained were characterized and the physicochemical properties were same as follows: saponification valule (SV) 322.575, iodine value 25.33mg/kg, acid value (AV) 7.4824 and free fatty acid value (FFAV) 3.76. These values proved that the palm kernel oil extracted locally as described has similar characteristics with those obtained through advanced mechanism and so, proves the two extraction methods suitable.

Publications

1.Cnidi Edbert Duru, Ijeoma Akunna Duru, Francis Chizoruo Ibe and Margaret Chinyelu Enedog (2017) Profiling of Zn2+ ion sorption in modeled aqueous solution by different parts of maize biomass. IOSR Journal of Applied Chemistry (IOSR-JAC) 10,70-75

2. F.C Ibe, B.O Ibe, C.B.C Ikpa, M.C. Enedoh, (2016) Remediation of mild crude oil polluted fresh water wet land with organic and ionorganic fertilizer. International Letters of Natural Sciences.  54, 75-85

3. M.C.Enedoh (2915) Complexes of 2-amino-4-thiazoleacetic acid hydrazide (ATAH), Salicyladehyde-2-amino-4-thiazoleacetic acid hydrazone(ATASH) and Acetone-2-amino-4-thiazoleacetic acid hydrazone(ATAAH) eacg with copper(II)sulphate. International Journal of Scientific & Engineering Research. 6, 110-116.

4 M.C. Enedoh and J.N Nwabueze(2011) Complexes of 4-cyanobenzaldehydecyclohexylacetic acid hydrazone with some M(II) sulphates and acetates (M=Ni,Cu,Co,Zn) Zuma Journal of Pure & Applied Science. 9, 1-7

5 M.C. Enedoh, F.C. Ibe and P.N. Ebosie(2016) Complexes of 2-amino-4-thiazoleacetic acid hydrazone, salicylaldehyde-2-amino-4-thiazoleacetic acid hydrazone and acetone-2-amino-4-thiazoleacetic acid hydrazone each with nickel(II) sulphate. African Journal of Education, science andTechnology(AJEST) 3,143-147.

Biography:

Maria Vilma Faustorilla obtained her Bachelor and Master of Science degrees in Chemistry from the University of the Philippines. She has accumulated many years of experience in R&D, QC, QA, Clinical and manufacturing environments in the pharmaceutical industry, having worked within various highly regulated environments that are NATA, TGA or FDA accredited. She is currently a PhD student of the University of South Australia in the environmental strand of the Future Industries Institute, which develop solutions to complex contamination problems

Abstract:

As petroleum is a complex mixture of hydrocarbons, the ecotoxicity of petroleum-contaminated soils has been based mostly on the total petroleum hydrocarbon (TPH) load. However, a requirement of environmental fate and risk analysis is the separation of TPH into its aliphatic and aromatic components appropriately due to the toxicity differences between the fractions. This study developed a fractionation method for TPH in soil using solid phase extraction (SPE) technique followed by analysis utilizing gas chromatography (GC) coupled to mass selective detector and flame ionization detector systems. Validation results suggested that method performance are related to molecular weight, molecular structure and soil organic matter content; thus, providing important information on the behaviour of the individual hydrocarbons such as adsorption into soil which is significant in determining environmental fate and weathering of hydrocarbons. Three soil samples contaminated with aliphatic and aromatic components were collected to determine earthworm chronic toxicity. Lethality and sub-lethal effects on days 7, 14, 21 and 28 were investigated on Eisenia fetida. The toxicity studies showed that aromatic fractions exerted increased lethal effects upon concentration on earthworms occurring at lower concentrations as compared to the aliphatic fractions, which only showed adverse effects at higher concentrations. This work emphasized the need to determine the fractions of TPH in a contaminated soil, instead of using TPH as a single hydrocarbon index, to have a more accurate assessment towards ecological hazards and impact.

Biography:

Rouhollah Ahmadi is an Assistant Professor of Mechanical Engineering at the Iran University of Science and Technology from 2013. His teaching and research are focused on Thermal- hydraulic, Optimization, and Thermal energy storage systems as it applies to energy systems. His work goals are to (1) educate/develop mechanical engineers/workforce, and (2) help move advanced energy systems from arts to science-based technologies that will help innovate optimize the system. These include energy efficiency of energy systems, latent thermal energy storage system, exergo-economic analysis, renewable energy, desalination and heat pipes.

Abstract:

Fig. 1 Ro system and energy harvester from sea wave

Publications

1. R.  Ahmadi, S. M. Pourfatemi, S. Ghaffari, Exergoeconomic optimization of hybrid system of GT, SOFC and MED implementing genetic algorithm, Desalination Volume 411, 1 June 2017, Pages 76–88

 2. R. Ahmadi, T. Okawa, Influence of surface wettability on bubble behavior and void evolution in subcooled flow boiling, International Journal of Thermal Sciences 97, pp. 114-125, 2015

3. R. Ahmadi, T. Okawa, Recognition of Net Vapor Generation in Subcooled Flow Boiling, I Journal of Multidisciplinary Engineering Science and Technology (ISSN:  3159-0040), Vol. 2, Issue 3, pp. 465-469 (2015)

4. R. Ahmadi, T. Ueno, T. Okawa, Visualization study on the mechanisms of net vapor generation in water subcooled flow boiling under moderate pressure conditions International Journal of Heat and Mass Transfer, Vol. 70, pp. 137-151 (2014).

5. R. Ahmadi, T. Ueno, T. Okawa, Experimental identification of the phenomenon triggering the net vapor generation in upward subcooled flow boiling of water at low pressure, International Journal of Heat and Mass Transfer, Vol. 55, No. 21-22, pp. 6067-6076 (2012).

Biography:

Seyed Jamaleddin Shahtaheri has completed his PhD at the age of 38 years from Surrey University, Guildford, Surrey, England in 1996. He is an academic member of Department of Occupational Health Engineering, Tehran University of Medical Sciences, Iran, acting as the Dean Research Deputy at Institute for Environmental Research the same University too. Shahtaheri is the Persistent Organic Pollutant Review Committee (POPRC) Member under the Stockholm Convention, UNEP, UN. He has published more than 150 papers in reputed journals and has been serving as an editorial board member of 7 national and International Journals.

Abstract:

In this study, headspace solid phase microextraction (HS-SPME) followed by gas chromatography using electron capture detection system (GC-ECD) were developed for the determination of chloraacetanilide (butachlor) and chlorpyrifos present in biological samples. Different parameters affecting the extraction procedure were optimized including extraction time (30 minutes), extraction temperature (80°C), sample volume (3 mL), sample pH (2), added NaCl (0.3 gram) and sample stirring rate (400 rpm). Different concentrations of 1-100 ng/ml were applied for butachlor and a linear calibration curve was obtained. Furthermore, a similar linearity was obtained for chlorpyrifos, using a concentration range of 1-250 ng/ml. The limit of detection (LOD) obtained for butachlor and chlorpyrifos were 0.088 and 0.53 ng/ml respectively. The optimized methods for both compounds were validated using two concentrations of 25 and 50 ng/ml in spiked urine samples. Obtained recoveries of spiked urine samples were 83.06-99.8% with RSD of lower than 11%. Optimized technique was simple, inexpensive, solvent free and fast in comparison with other conventional methods and had compatibility with the chromatographic analytical system. This method offers low detection limits to analyze pesticides in urine samples that are very important in the exposure monitoring in occupational health.

Biography:

James O Ojo is skilled in the area of extractive metallurgy with strong passion for vanadium and molybdenum. His impressive output emanated from the many years of research and teaching on the aqueous chemistry of these metals, thus the versatility in the utilization of various extractants, including trioctyl phosphine oxide, and many other ligands for the extractive separation of these uncommonly associated metals. His ultimate interest, as well as success, is in the devising of simple extractive separation routes for co-polymerizing metals (from admixtures) such as vanadium and molybdenum, with vast applications in hydrometallurgy, recycling and routine analysis. This approach will eventually impart finesse to the metallurgical and recycling processes of several versatile metals.

Abstract:

The extractive separation of vanadium (V) and molybdenum (VI) from 6.0 mol dm^-3 HCI in the presence of 0.1 mol dm^-3 KCI as a salting -out agent using trioctyl phosphine oxide (TOPO) IN n-heptane has been investigated. Equilibrations were performed at optimal contact time of 5 min. The V (V) and Mo (VI) ions were determined spectrophotometrically by the phosphotungstate and thiocyanate methods respectively. From their individual synthetic solutions, the effect of increasing concentration of TOPO in the range 0.013-0.065moldm^-3 to enhance a selective extraction, proved inefficient. This is because both ions were substantially extracted with percentage V(V) extraction (E%) optimized at 90.0% while Mo(VI) was 95.0%, with both observed at a concentration of 0.52 mol dm^-3  TOPO. This was reflected in the low separation factor() of the range 1.8-2.1. For the synthetic simulated mixture of the metals in 6.0 mol dm^-3 HCl, parameters such as the effect of concentration of TOPO and organic to aqueous phase volume ratio (1:1- 4:1) on the percentage of the metal extracted or stripped was examined. The optimal separation of V(V) and Mo(VI) was achieved by selective stripping with percentage of V(V) and Mo(VI) stripped (separately) after two stages being 99.0 and 99.8% respectively. In this process we used 2.0 mol dm^-3 H₂SO₄ and 14.5 mol dm^-3 NH₃ in that order, at organic to aqueous phase volume ratio (1:1 to 4:1). It decreased the percentage of the metals co-extracted and hence that available for stripping (E% of V(V) decreased from 90.0 to 75.0% and for Mo(VI) 96.0 to 57.1% for a single stage stripping. From the slope and spectral analysis , the stoichiometries of the composition of the organic phase were formulated as VO₂Cl. 2TOPO and MoO₂Cl₂. TOPO.

Biography:

Maryam Sayah has completed her master's degree in 2016 from the Department of chemistry, North Tehran Branch, Islamic Azad University, Tehran, Iran. Her research project under the supervision of Dr Vahid Kiarostami was on the Development of a low density Solvent Based Solvent-Terminated Dispersive Liquid Liquid Microextraction (ST-DLLME) for the Extraction of acrylamide in water sample using central composite design (CCD). She is interested in chromatography (GC and HPLC), microextraction and chemometric methods.

Abstract:

Statement of the Problem: Polyacrylamide can be applied with multiple purposes in some industries such flocculants for clarification of potable water and treatment of municipal and industrial effluents and also used as grouting agents in the construction of drinking water reservoirs and wells, soil conditioning agents. Residual levels of unreacted acrylamide monomer in polyacrylamide can easily transfer to environmental and drinking water due to its water solubility and consequently causes, the most important source of water contamination. Acrylamide has been stated as carcinogenic to humans (Group 2A) with a lifetime cancer of 10^-5 in 0.5 µg L^-1 in drinking water. Methodology & Theoretical Orientation: A reliable, fast and safe method with easy operation for determination of acrylamide in water samples using a low density solvent based solvent-terminated dispersive liquid liquid microextraction (ST-DLLME) combined with GC-FID as a low cost detector which is available for most research laboratories has been developed and studied. Octanone and methanol were selected as the best extraction and dispersive solvents, respectively, using one factor at a time method. A central composite design (CCD) as a response surface methodology was used for multivariate optimization of the influences of other five factors (Volumes of extraction and dispersive solvents, PH, salt addition and extraction time) on the extraction efficiency. Under optimized condition (extraction solvent and its volume: Octanone, 175 µl; dispersive solvent and its volume: 683 µl; PH: 6.5; salt addition: 2.5% and extraction time: 4 min), the linear range was 0.3-550 ng mlˉ¹ with detection (S/N=3) and determination (S/N=10) limits of 0.1 and 0.3 ng mlˉ¹, respectively. The percentage recoveries of acrylamide from drinking and well water at spiking level of 0.5, 1 and 10 ng mlˉ¹ were obtained in the range of 90.8-94.1%. Compared with the previously reported methods, the proposed ST-DLLME method indicates adequately figures of merit.

Image

Figure 1: The graphical abstract of the proposed ST-DLLME method coupled GC-FID

Publications

1.Chen L, Haizhu L, Ping Y, Jinun Z, Xi C (2009) Determination of Acrylamide in Foods by Solid Phase Microextraction-Gas Chromatography. Food Science and Biotechnology 18(4):895-899.

2.Sobhi HR, Ghambarian M, Behbahani M, Esrafili A (2017) Application of modified hollow fiber liquid phase microextraction in conjunction with chromatography-electron capture detection for quantification of acrylamide in waste water samples at ultra-trace levels. J Chromatogr A 1487: 30-35.

3.Alpmann A,  Morlock G (2008) Rapid and sensitive determination of acrylamide in drinking water by planar chromatography and fluorescence detection after derivatization with dansulfinic acid. Journal of separation science 31(1): 71-77.

4.Cavalli S, Polesello S, Saccani G (2004) Determination of acrylamide in drinking water by large-volume direct injection and ion-exclusion chromatography–mass spectrometry. Journal of Chromatography A 1039(1): 155-159.

Biography:

Adolfo Iulianelli has MSc Degree in Chemical Engineering in 2002 at University of Calabria (Italy), obtained his PhD in Chemical and Materials Engineering in 2006 at the same university. Nowadays, he is working at the Institute on Membrane Technology of the National Research Council of Italy (CNR-ITM). He is author and co-author of more than 120 papers, editorials and conference papers, one patent, two books and more than 20 book chapters. Furthermore, he is Reviewer of 30 international ICI journals, Invited/Keynote Speaker in more than 10 international conferences, training school, etc., Subject Editor of the Scientific World Journal, Guest Editor for the International Journal of Hydrogen Energy, Associate Editor of International Journal of Membrane Science and Technology and Editorial Member of other scientific journals. His research interests are Membrane reactors, Membrane technology in gas separation, Hydrogen production and reforming reactions, CO₂ capture, etc. He has been involved in various Italian (5) and European (4) projects. His h-index is 24.

Abstract:

Nowadays, gas separation technologies play an important role at industrial level in a large number of chemical applications. Among them, it is worth of noting the pressure swing adsorption, temperature swing adsorption, liquid absorption and stripping, cryogenic distillation and, as emerging technology, the membrane gas separation (MGS). In most of cases, they compete each other for the same application, whereas for high product purity requirements, a combination of them should be requested. Nevertheless, the recovery and desired purity requirements and the scale operation constitute the main variables for the selection of a separation process. The operational and economic benefits and drawbacks due to the utilization of MGS technology over other gas separation processes have been largely reviewed and a growing progress has been observed in this field. Moreover, in recent years, membrane engineering has driven to significant innovations in products and processes, making membrane technologies as a valid alternative to conventional operations. Meanwhile, the application of membrane technology in the viewpoint of the Process Intensification Strategy has made possible relevant benefits in terms of high energy saving, better raw material exploitation, lower waste generation and dramatic reduction of equipment size. Among a number of potential applications in chemical processes, such polymeric membranes are particularly used in H2/N2 separation (ammonia synthesis process) and hydrogen recovery in refineries. However, in the last years also inorganic membrane technology has received a great attention, particularly for H2 separation from industrial gaseous streams via Pd-based membranes. Here an application of thermal treated PEEK-WC and PLA membranes for separating H2 from other gases of interest is presented. Furthermore, a comparison with the utilization of composite Pd-based MGS technology is given, consequently pointing out the advantages and disadvantages of both applications.

Image

Figure 1. Permeation characteristics of PLA membranes over Robeson plot - H₂/CO₂ selectivity vs H₂ permeability upper-bound.

Publications

1. Iulianelli A, Alavi M, Bagnato G, Liguori S, Wilcox J, Rahimpour MR, Eslamlouyan R, Anzelmo B, Basile A (2016) Supported Pd-Au membrane reactor for hydrogen production: membrane preparation, characterization and testing. Molecules 21:581-594.
2. Liguori S, Iulianelli A, Dalena F, Pinacci P, Drago F, Broglia M, Huang Y, Basile A (2014) Performance and long-term stability of Pd/PSS and Pd/Al₂O₃ for hydrogen separation. Membranes 4:143-162.
3. Briceño K, Montané D, Garcia-Valls R, Iulianelli A, Basile A (2012) Fabrication variables affecting the structure and properties of supported carbon molecular sieve membranes for hydrogen separation. Journal of Membrane Science 415-416:288-297.
4. Iulianelli A, Basile A, Li H, Van Den Brink RW (2011) Inorganic membranes for pre-combustion carbon dioxide (CO₂) capture, in Advanced membrane science and technology for sustainable energy and environmental applications. Woodhead Publishing Series in Energy – Cornwall (UK), Ch. 7, pp 184-213.

 5. Iulianelli A, Liguori S, Morrone P, Basile A (2012) Membrane and    membrane reactor technologies for CO_x purification of gaseous streams.   Nova Science Publishers, New York (USA).