Natural Noble Metal Nanoparticles: Formation, Stabilization, and Toxicity in Aquatic Environment by Dr. Virender Sharma

​​FAFS hosted Professor Virender Sharma, Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, USA, Director of the Program of Environment and Sustainability, SPH, to present a lecture entitled “Natural Noble Metal Nanoparticles: Formation, Stabilization, and Toxicity in Aquatic Environment” on May 21, 2018.

Nanoparticles (NPs) exist in ores, rocks, wastewater, river, atmosphere, ocean, and hydrothermal vents.  The presentation summarized the examples of presence of different nanoparticles and their oxides/sulfides forms in different compartment of aquatic environment.  The focus of the presentation was on noble nanoparticles, silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs). He explained the influence of variation of natural water conditions such as pH, temperature, light, and types of natural organic matter, NOM (e.g., fluvic acid and humic acid) the mechanism of the formation and stabilization of AgNPs and AuNPs mediated by NOM.  Finally, he presented the current understanding of the toxicity of naturally formed AgNPs, and briefly discussed the recent results on bimetallic Ag-Au nanoparticles.

About Dr. Sharma:

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 280 peer-reviewed publications. Dr. Sharma has also published 54 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 by Environmental Science & Technology, and International Fellowship awarded by the Chinese Academy of Sciences.