{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/105845"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/105845","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Development and performance characterization of first-generation dendrimeric nanofiltration membranes","abstract":"Upstream processes used for oil and gas production generate brackish water as a byproduct called produced water. Desalination and reuse of produced water can potentially be a new resource for freshwater which may alleviate local and global water scarcity. Currently, reverse osmosis (RO) is the state-of-the-art technology for desalination of brackish water; however, RO treatment of relatively high salinity produced water is prohibitive or not feasible because in addition to treating toxic organic solutes they provide high rejection of background electrolytes. Consequently there is a need to develop nanofiltration (NF) membrane filtration processes effective in removing dissolved organic matter while allowing passage of inorganic salts. In this project, seven distinct novel first generation (G1) NF polyamide membranes have been developed and studied to understand their rejecting capability against selected organic surrogate, Rhodamine-WT (R-WT), and inorganic salts, NaCl and MgSO4. All seven membranes resulted in a similar and high rejection of R-WT at around 96% or above, and a spectrum of varying rejections for NaCl ranging from 10% to 90%, and similar rejection for MgSO4. Rutherford back-scattering spectroscopy (RBS) analyses of G1 membranes revealed that their active layers had thickness in the range of 17-44 nm, all thinner compared to the range of 50-200 nm for commercial NF polyamide membranes.","abstract_html":"Upstream processes used for oil and gas production generate brackish water as a byproduct called produced water. Desalination and reuse of produced water can potentially be a new resource for freshwater which may alleviate local and global water scarcity. Currently, reverse osmosis (RO) is the state-of-the-art technology for desalination of brackish water; however, RO treatment of relatively high salinity produced water is prohibitive or not feasible because in addition to treating toxic organic solutes they provide high rejection of background electrolytes. Consequently there is a need to develop nanofiltration (NF) membrane filtration processes effective in removing dissolved organic matter while allowing passage of inorganic salts. In this project, seven distinct novel first generation (G1) NF polyamide membranes have been developed and studied to understand their rejecting capability against selected organic surrogate, Rhodamine-WT (R-WT), and inorganic salts, NaCl and MgSO4. All seven membranes resulted in a similar and high rejection of R-WT at around 96% or above, and a spectrum of varying rejections for NaCl ranging from 10% to 90%, and similar rejection for MgSO4. Rutherford back-scattering spectroscopy (RBS) analyses of G1 membranes revealed that their active layers had thickness in the range of 17-44 nm, all thinner compared to the range of 50-200 nm for commercial NF polyamide membranes.","abstract_has_math":false,"creators":["Park, Seungyun"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Environ Engr in Civil Engr","degree_department":null,"school":null,"contributors":["Mariñas, Benito Jose"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2019,"date_issued":"2019-11-26T20:49:37Z","date_published":"2019-11-26T20:49:37Z","updated_at":"2026-07-22T22:24:45Z","subjects":["Nanofiltration","industrial wastewater","novel membrane material","membrane separation","oil and gas industry","produced water","Rutherford Backscattering Spectroscopy"],"languages":["en"],"rights":["Copyright 2019 Seungyun Park"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/105845","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Mariñas, Benito Jose"]},{"key":"dc:creator","label":"Author","values":["Park, Seungyun"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2019-11-26T20:49:37Z","2021-11-27T10:15:23Z","2019-07-19","2019-08"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Environ Engr in Civil Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"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":["Nanofiltration","industrial wastewater","novel membrane material","membrane separation","oil and gas industry","produced water","Rutherford Backscattering Spectroscopy"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2019 Seungyun Park"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/105845"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Upstream processes used for oil and gas production generate brackish water as a byproduct called produced water. Desalination and reuse of produced water can potentially be a new resource for freshwater which may alleviate local and global water scarcity. Currently, reverse osmosis (RO) is the state-of-the-art technology for desalination of brackish water; however, RO treatment of relatively high salinity produced water is prohibitive or not feasible because in addition to treating toxic organic solutes they provide high rejection of background electrolytes. Consequently there is a need to develop nanofiltration (NF) membrane filtration processes effective in removing dissolved organic matter while allowing passage of inorganic salts. In this project, seven distinct novel first generation (G1) NF polyamide membranes have been developed and studied to understand their rejecting capability against selected organic surrogate, Rhodamine-WT (R-WT), and inorganic salts, NaCl and MgSO4. All seven membranes resulted in a similar and high rejection of R-WT at around 96% or above, and a spectrum of varying rejections for NaCl ranging from 10% to 90%, and similar rejection for MgSO4. Rutherford back-scattering spectroscopy (RBS) analyses of G1 membranes revealed that their active layers had thickness in the range of 17-44 nm, all thinner compared to the range of 50-200 nm for commercial NF polyamide membranes.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2021-08-01","The student, Seungyun Park, accepted the attached license on 2019-07-19 at 14:24.","The student, Seungyun Park, submitted this Thesis for approval on 2019-07-19 at 14:29.","This Thesis was approved for publication on 2019-07-19 at 15:06.","DSpace SAF Submission Ingestion Package generated from Vireo submission #14397 on 2019-11-26 at 13:06:27","Made available in DSpace on 2019-11-26T20:49:37Z (GMT). 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Desalination and reuse of produced water can potentially be a new resource for freshwater which may alleviate local and global water scarcity. Currently, reverse osmosis (RO) is the state-of-the-art technology for desalination of brackish water; however, RO treatment of relatively high salinity produced water is prohibitive or not feasible because in addition to treating toxic organic solutes they provide high rejection of background electrolytes. Consequently there is a need to develop nanofiltration (NF) membrane filtration processes effective in removing dissolved organic matter while allowing passage of inorganic salts. In this project, seven distinct novel first generation (G1) NF polyamide membranes have been developed and studied to understand their rejecting capability against selected organic surrogate, Rhodamine-WT (R-WT), and inorganic salts, NaCl and MgSO4. All seven membranes resulted in a similar and high rejection of R-WT at around 96% or above, and a spectrum of varying rejections for NaCl ranging from 10% to 90%, and similar rejection for MgSO4. Rutherford back-scattering spectroscopy (RBS) analyses of G1 membranes revealed that their active layers had thickness in the range of 17-44 nm, all thinner compared to the range of 50-200 nm for commercial NF polyamide membranes.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2021-08-01","The student, Seungyun Park, accepted the attached license on 2019-07-19 at 14:24.","The student, Seungyun Park, submitted this Thesis for approval on 2019-07-19 at 14:29.","This Thesis was approved for publication on 2019-07-19 at 15:06.","DSpace SAF Submission Ingestion Package generated from Vireo submission #14397 on 2019-11-26 at 13:06:27","Made available in DSpace on 2019-11-26T20:49:37Z (GMT). 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