Presented via Webinar by Rajveer Singh - Research Scientist in Civil, Architectural and Environmental Engineering, Drexel University, Philadelphia, PA
Abstract: Improved understanding of microbe-water-subsurface porous media interactions that control biogeochemistry in subsurface aquifer and reservoir systems is critical from the prospective of a number environmental issues, such as Geological carbon sequestration, Bioremediation of Groundwater systems, and Energy resources recovery from subsurface. My approach involves using 2D microfluidic experimental test bed, usually called micromodels, to simulate subsurface hydrodynamic environment that allows in-situ visualization, tracking and quantification of biogeochemical reactions in subsurface reservoir systems. Several examples from reservoirs systems including bio-mineralization of CaCO3 during reactive transport in porous media its impact on pore space alteration and process efficacy and contaminants’ mixing enhancement during bacterial random motility will be discussed. A novel design of 2D- microfluidic experimental flow bed, based on real geo-materials as opposed to engineered materials in traditional micromodels, will be discussed. Finally, chemical imaging (Raman and Infrared spectroscopy) methods will be discussed for in-situ characterization of biogeochemical reactions in the flow cells as well as alternate analytical techniques in environmental engineering.
Bio: Rajveer Singh just accepted a position at Drexel University (Philadelphia, PA) as a Research Scientist in the Department of Civil, Architectural and Environmental Engineering, Drexel University, Philadelphia, PA. Previously, he was a Research Associate at Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, IL, and a postdoctoral research associate in the department of Civil and Environmental Engineering/Institute of Genomic Biology at University of Illinois at Urbana-Champaign, IL, USA. He received his Ph.D. degree in Environmental Engineering from Drexel University, Philadelphia, PA, USA in 2011. Prior to this he received his masters in Environmental Engineering and Management form IIT Kanpur, UP, India, and undergraduate in Agricultural Engineering from G. B. Pant University of Agriculture and Technology, Pantnagar, UK, India. His research interests primarily lies in studying reactive transport in subsurface porous media using microfluidics and chemical imaging techniques. Broadly he has research experience in areas of Geological carbon sequestration, In-situ bioremediation of contaminated aquifers, Fate and transport of bacteria and contaminants in groundwater, Environmental micro-fluidics, Water and wastewater treatment, and Geo-environmental engineering.