Display Full Text | Download Full Text
15.45 MB PDF file

Degree

Master of Science in Chemical Engineering, University of Toledo, Chemical Engineering, 2004.

Abstract

The effect of ion beam irradiation on the performance of two commercial nanofiltration membranes was investigated. This study focused on four major targets of water treatment: monovalent cations, divalent cations, dissolved organic carbon (DOC) and bacteria. Membrane performance was evaluated by measuring permeability, selectivity, and fouling. Irradiation of the polyether sulfone (PES) membrane revealed similar removal characteristics for all raw water components when compared to the unmodified membrane. There was a decrease in membrane permeability, while the resistance to fouling was improved. Irradiation of the polyamide (PA) membrane caused a slight reduction in selectivity for monovalent cations and a slight improvement for divalent cations and dissolved organic carbon. While selectivity slightly increased, the increase in membrane permeability suggested that a shift of the permeability/selectivity membrane-characteristic curve occurred due to irradiation.

Keywords

Ion Beam Irradiation; Membranes; Fouling; Polyether Sulfone; Polyamide; Membrane Modification; Water Treatment

Advisor

Isabel C. Escobar

Pages

294p.

Document number: toledo1083875419
Permalink: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1083875419

★

This ETD has been downloaded 1138 times (through March 2013)

This ETD was one of the top ten most frequent downloads of March 2010.