Mississippi State University
Gude, Veera Gnanrswar.
Truax, Dennis D.
Ramirez-Avila, John J.
Martin, James L.
Date of Degree
Graduate Thesis - Open Access
Civil and Environmental Engineering
Master of Science
James Worth Bagley College of Engineering
Department of Civil and Environmental Engineering
Graphene Oxide (GO) has emerged within the last decade as a next generation material for water treatment. Fabrication of graphene oxide membranes has been limited in scale and application due to repulsive hydration forces causing GO layers to electrostatically separate. In this study, chitosan is utilized to increase GO stability in the wet state through interactions with the negatively charged GO sheets (CSGO). This simple aqueous self-assembly allows scalable fabrication and enhanced stability for membrane applications in crosslow. The CSGO membrane’s performance was tested in a crosslow reactor and challenged with methylene blue at concentrations ranging from 1 to 100 ppm at 345 kPa with fluxes ranging from 1 to 4.5 L/(m2 hr) with 100% removal by physical rejection. This work demonstrates that the CSGO composite matrix is a potential alternative to traditional polymeric membranes for water treatment using a renewable biopolymer and minimal chemical input.
Mattei Sosa, Jose Antonio, "Crosslinking Graphene Oxide and Chitosan to Form Scalable Water Treatment Membranes" (2017). Theses and Dissertations. 1226.