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钟山学术讲坛-德州农工大学Texas A&M University教授报告

发布日期: 2019-07-16 08:59:25 浏览次数:

报告题目:Advances in Ferrate Technology: Elucidating Role of Activated Ferrate to Remove Organic Pollutants Rapidly

 

报告人:Virender K. Sharma

报告地点: 源与环境科学学院B201

报告时间:2019719日(星期五),下午2:00

 

 

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 FeVI by 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, FeV and FeIV, which could react with pollutants by 2-4 orders of magnitude faster than FeVI.  The presentation will give examples of enhanced oxidation of  various pollutants 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 FeVI could oxidize pollutant rapidly.  Addition of sulfite resulted in enhancement up to 100%.  Comparatively, oxygen-atom transfer reductants yielded enhancement up to only 40%.  Elucidation of mechanisms using different reductants to FeVI will be presented.  Finally, removal of pharmaceuticals in urine samples urine will be discussed.


报告人简介:

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Dr. Virender K. Sharma 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 8 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), Outstanding Distinguish Scientist Award by Sigma Xi (Texas A&M University Chapter), International Fellowship awarded by the Chinese Academy of Sciences, and Invited Professorship by University of Paris, France.


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