Date of Graduation

5-2020

Document Type

Thesis

Degree Name

Master of Science in Microelectronics-Photonics (MS)

Degree Level

Graduate

Department

Graduate School

Advisor

Ranil Wickramsinghe

Committee Member

Xianghong Qian

Second Committee Member

Rick Wise

Third Committee Member

Ingrid Fritsch

Keywords

Electrocoagulation, Membrane Distillation, Membrane Separation, Membrane Surface Modification, Membrane Technology, Produced Water Treatment, Scale Formation

Abstract

Membrane distillation is an emerging technology for treating hydraulic fracturing flowback and produced waters. Suppression of membrane fouling by inorganic and polar and non-polar organic compounds is a challenge. Here polyhydroxyethyl methacrylate, polyacrylic acid, polvinylallyl imidazolium bromide and polyvinylhexyl imidazolium bromide chains have been grafted from the membrane surface. Fouling is initially due to adsorption of organic compounds followed by scale formation. When challenged with produced water, membranes modified with polvinylallyl imidazolium bromide chains provided the greatest resistance to fouling. For EC pretreated produced water and synthetic produced water that contained mainly inorganic species, the flux decline was much less.

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