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Title:Partitioning and Diffusivity of arsenic(III) in the Active Layer of Thin-Film Composite Reverse Osmosis and Nanofiltration Membranes
Author(s):Mi, Baoxia
Doctoral Committee Chair(s):Mariñas, Benito J.
Department / Program:Civl and Environmental Engineering
Discipline:Civl and Environmental Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Engineering, Environmental
Abstract:The main objective of this study, therefore, was to understand the mechanism controlling the permeation of a neutral molecule (arsenic (III)) through RO/NF membranes. The permeation of potassium iodide (KI), used as background electrolyte, was also investigated. This study introduced Rutherford backscattering spectrometry (RBS) into the membrane field. Major achievements were made from three perspectives: (1) successful characterization of membrane physico-chemical properties, including elemental composition, thickness and roughness of membrane active layer; (2) characterization of the partitioning behavior of neutral and ionic species at various pH and concentration conditions; (3) differentiation of diffusive permeation from advection with permeation data using a simplified solution-diffusion model. By integrating obtained information on membrane properties, solute-membrane interactions, and rejection performance, a better understanding on the mechanisms controlling the transport of neutral and ionic species through RO/NF membranes was attained.
Issue Date:2006
Description:173 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006.
Other Identifier(s):(MiAaPQ)AAI3242939
Date Available in IDEALS:2015-09-25
Date Deposited:2006

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