Graphene-based Nanocomposite Membranes for Energy-Efficient Desalination and Water Reuse
Dr. Saifur Rahaman(Concordia University)
Title: Membrane technologies are used across many industries despite persistent challenges. In water treatment, the most critical aspects to be improved in existing membrane technologies include water flux and separation efficiency, resistance to fouling agents such as organics and microbes, and energy efficiency. Nanoscience and Nanotechnology opens new possibilities for the development of functional materials. Of particular interest are graphene-based nanomaterials, which possess unique structural, electrical and antimicrobial properties and offer multiple routes for functionalization into advanced nanocomposite membrane materials.
In this presentation, I will discuss about the development of graphene-based nanocomposite membranes for seawater desalination, and water reclamation and reuse. The main objective of this research was to develop nano-enabled advanced membrane materials that possess highly desired anti-fouling properties and water affinity, making them unfavorable to organic foulant adhesion while preferential to water wetting and water permeation during the filtration process. The incorporation of graphene-based functional materials in membrane improves the water permeation flux, water/contaminant separation efficiency, and antifouling property. Such membranes is a timely development: with the global population soaring, the World Bank-sponsored 2030 Water Resources Group estimates that by 2030 the worldwide demand for water may exceed supplies by 40%. The membranes developed within this research project can also be used for other uses; for example, in industrial applications, they could be used for removal of contaminants from crudes or water separation in chemical conversion processes for reuse and recycling.
Bio: Dr. Rahaman is currently a tenured Associate Professor of Environmental Engineering at Concordia University. Prior to joining Concordia as an Assistant Professor in June 2012, he spent two years as an NSERC-Canada Postdoctoral Fellow in the Department of Chemical and Environmental Engineering at Yale University, New Haven, Connecticut. Dr. Rahaman received his Ph.D. from University of British Columbia (UBC), Vancouver, BC, M.A.Sc. from Dalhousie University, Halifax, NS, and B.Sc. from Bangladesh University of Engineering and Technology (BUET), Dhaka, Bangladesh, all in Civil (Environmental) engineering.
The primary focus of Dr. Rahaman’s current research is to develop advanced materials and novel membrane-based processes for water and wastewater treatment. His research interest includes (i) environmental applications and implications of engineered nanomaterials, (ii) membrane separations for water and wastewater purification, (iii) electrochemical advanced oxidation for disinfection and destruction of trace contaminants, and (iv) resource recovery (water, nutrient and energy) from industrial wastewater. Dr. Rahaman received a number of prestigious awards including Concordia Research Fellow Award in Category A (2017), MWH/AEESP Best Master's Thesis Advisor Award (2016), Petro-Canada Young Innovators Award (2015), NSERC Postdoctoral Fellowship (2010-2012) and British Columbia Water & Waste Association (BCWWA) Student Achievement Award (2009). Dr Rahaman is currently an academic editor of the PLOS ONE and a member of the editorial board of Frontiers in Environmental Science.
Dr. Rahaman is the guest of Dr. Marek Majewski.