报告题目：Activated Ferrate: Accelerated Oxidation of Organic Pollutants in Water
报告人：美国德州农工大学Virender K. Sharma教授
报告摘要：Iron-based oxidants of tetra-oxy anions of high-valent iron, commonly called ferrates (FeVIO42-(FeVI), FeVO43-(FeV), and FeIVO44-(FeIV)) have demonstrated increasing interest in sustainable organic synthesis, green energy storage, and decontamination of a wide range of pollutants in water. In the last few years, we are interested in enhancing the oxidation capability of FeVIby tuning its chemistry by developing a strategy, based on fundamental chemistry of ferrates to oxidize pollutants very rapidly (30 seconds). Our approach involved intermediate species, FeVand FeIV, which could react with pollutants by 2-4 orders of magnitude faster than FeVI. The presentation will give examples of accelerated oxidation of a wide range of micropollutants in 30 s. It will be shown that the addition of one-electron transfer reductant (sulfite (SO32-) and established oxygen-transfer reductants (hydroxylamine (NH2OH), arsenite (AsIII(OH)3), selenite (SeO32-), phosphite (PO33-), and nitrite (NO2-))to FeVIcould oxidize pollutant rapidly. Addition of sulfite and thiosulfate resulted in enhancement up to 100%. Comparatively, oxygen-atom transfer reductants yielded enhancement up to only 40%. Elucidation of mechanisms using such different reductants to FeVIwill be presented in detail.
Sharma教授简介：Dr. Virender K. Sharma received his Ph.D. from Rosenstiel School of Marine and Atmospheric Science, University of Miami, Florida, USA. His postdoctoral work was at Brookhaven National Laboratory and the State University of New York, Buffalo, New York. He is currently a Professor at the Department of Environmental and Occupational Health, School of Public Health (SPH), Texas A&M University. He is also serving as the Director of the Program of Environment and Sustainability of the SPH. Dr. Sharma has made seminal contributions in the areas of chemistry and environmental applications of ferrates. Dr. Sharma has also made key contributions in elucidating stabilization and toxicity of natural nanoparticles in an aquatic environment, resulting in an impact on human and ecological health. He is also working on understanding mechanism of the formation of disinfection byproducts in water. His research also includes studying environment fate of environmentally persistent free radicals and antibiotics resistant bacteria and genes. He has published more than 300 peer-reviewed publications. Dr. Sharma has also published 55 book chapters, 36 proceedings, and authored/edited eight books. His distinguish awards include Fellow of the Royal Society of Chemistry, Faculty Excellence in Research by Florida Tech, Outstanding Chemist by the American Chemical Society (Orlando Section), Certificate of Merit Award by the Environmental Chemistry Division of the American Chemical Society, Excellence in Review byEnvironmental Science & Technology, and International Fellowship awarded by the Chinese Academy of Sciences.