Vincent Chatain is an Associate Professor at INSA Lyon (France) in DEEP laboratory (Wastes Water Environment Materials). He was born in 1977 and he is currently Director of the European undergraduate engineering department EURINSA. His educational background is in environmental sciences and biogeochemistry. He holds a Ph-D in 2004 in environmental geochemistry from INSA Lyon. During his Ph-D, he worked during 6 months as a doctoral fellow in the Civil and Environmental Engineering Department of Vanderbilt University (Nashville, TN, USA). From 2005 to 2007, he was Consulting Engineer - Chargé d'Affaires in environment and sustainable development at GIRUS design office. He joined INSA Lyon in 2007 and his major field of research concerns the fate of inorganic contaminants and/or disadvantageous compounds in soils, sediments, wastes and biogases. He has developed knowledge in the environmental and biogeochemical characterization of complex matrices (solid or gas). He is currently involved in research dealing with evaluation of biogeochemical reactivity of sediments in the perspective of their long-term management. His actual research interests are also dealing with the assessment of sampling and analytical methods for total Silicon quantification in biogases. He cooperates with private companies in research and has been involved in national research programs: ANR SEDIGEST 2008-2011, EC2CO-ECODYN CNRS 2013-2014. He is involved in scientific committees of a number of organizations and institutes. He teaches general chemistry and environmental geochemistry in engineering school.
The application of extracting aqueous solutions with cyclodextrins in several soil remediation te... more The application of extracting aqueous solutions with cyclodextrins in several soil remediation technologies has been increasingly studied but little is known about their removal capacities toward the inorganic species. Herein, the effectiveness of cyclodextrins (CDs) in extracting arsenic, copper, and iron from a mining soil is presented. In a preliminary test of four types of CD aqueous solutions, only the addition of carboxylmethyl-beta-cyclodextrin CMCD (a cyclodextrin derivative) led to a significant enhancement in arsenic removal. An increase in the concentration of copper and iron in the leachates was also observed with CMCD. Kinetic study of arsenic release was carried out at two temperatures (20 and 35 degrees C). The arsenic concentration in the leachates increases with increasing cyclodextrin concentration. At an 80 mM CMCD concentration, arsenic, copper, and iron released in filtrates were about 20-, 1,000-, and 4,000-fold greater, respectively, than that obtained using deionized water. In the soil system, the CMCD capacity removal was found to be higher for cations than for arsenic. Because the tetrachlorophenol can co-occur with arsenic and copper in several contaminated sites, its solubilization by CMCD was also investigated. Extraction experiments were performed to extract 2,3,4,6 tetrachlorophenol (TeCP) in spiked soil with CMCD. The results of batch experiments have shown that CMCD could significantly increase the TeCP extraction from soil. CD sorption on soils as quantified by a fluorescence technique was low, indicating no significant loss of CD during the leaching experiments. The use of CMCD as a flushing agent to enhance the removal of both inorganic and organic pollutants from mixed-contaminated soils appears as a promising remediation method.
The application of extracting aqueous solutions with cyclodextrins in several soil remediation te... more The application of extracting aqueous solutions with cyclodextrins in several soil remediation technologies has been increasingly studied but little is known about their removal capacities toward the inorganic species. Herein, the effectiveness of cyclodextrins (CDs) in extracting arsenic, copper, and iron from a mining soil is presented. In a preliminary test of four types of CD aqueous solutions, only the addition of carboxylmethyl-beta-cyclodextrin CMCD (a cyclodextrin derivative) led to a significant enhancement in arsenic removal. An increase in the concentration of copper and iron in the leachates was also observed with CMCD. Kinetic study of arsenic release was carried out at two temperatures (20 and 35 degrees C). The arsenic concentration in the leachates increases with increasing cyclodextrin concentration. At an 80 mM CMCD concentration, arsenic, copper, and iron released in filtrates were about 20-, 1,000-, and 4,000-fold greater, respectively, than that obtained using deionized water. In the soil system, the CMCD capacity removal was found to be higher for cations than for arsenic. Because the tetrachlorophenol can co-occur with arsenic and copper in several contaminated sites, its solubilization by CMCD was also investigated. Extraction experiments were performed to extract 2,3,4,6 tetrachlorophenol (TeCP) in spiked soil with CMCD. The results of batch experiments have shown that CMCD could significantly increase the TeCP extraction from soil. CD sorption on soils as quantified by a fluorescence technique was low, indicating no significant loss of CD during the leaching experiments. The use of CMCD as a flushing agent to enhance the removal of both inorganic and organic pollutants from mixed-contaminated soils appears as a promising remediation method.
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