Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Gude, Veera Gnanrswar.

Committee Member

Truax, Dennis D.

Committee Member

Ramirez-Avila, John J.

Committee Member

Martin, James L.

Committee Member

Griggs, Christopher.

Date of Degree

5-1-2017

Document Type

Graduate Thesis - Open Access

Major

Civil and Environmental Engineering

Degree Name

Master of Science

College

James Worth Bagley College of Engineering

Department

Department of Civil and Environmental Engineering

Abstract

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.

URI

https://hdl.handle.net/11668/16849

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