{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/83304"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/83304","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Partitioning and Diffusivity of arsenic(III) in the Active Layer of Thin-Film Composite Reverse Osmosis and Nanofiltration Membranes","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.","abstract_html":"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.","abstract_has_math":false,"creators":["Mi, Baoxia"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Civl and Environmental Engineering","degree_department":null,"school":null,"contributors":["Mariñas, Benito J."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T21:04:11Z","date_published":"2015-09-25T21:04:11Z","updated_at":"2026-07-22T22:26:21Z","subjects":["Engineering, Environmental"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI3242939"],"render_values":[{"text":"(MiAaPQ)AAI3242939","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/83304","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Mariñas, Benito J."]},{"key":"dc:creator","label":"Author","values":["Mi, Baoxia"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T21:04:11Z","10000-01-01","2006"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Civl and Environmental Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engineering, Environmental"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/83304","(MiAaPQ)AAI3242939"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["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. 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