{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/109640"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/109640","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Novel covalent organic framework (COF) thin-film composite nanofiltration membrane for effective removal of organic compounds from petroleum produced water","abstract":"Petroleum-produced water is the co-produced aqueous liquid phase along with the oil and/or gas phases during petroleum production operations. It’s considered the largest waste stream associated with oil and gas extraction. The treatment and further reuse of produced water are essential to address environmental protection and global water scarcity challenges. Although there are adequate technologies to remove the bulk of organic matter in produced water, the removal of small organic matter remains a challenge. A novel thin-film composite nanofiltration membrane with an active layer made with a covalent organic framework (COF) developed in the early phases of this study was used to investigate its rejection capability for organic model compounds present in treated produced water. Permeation experiments with the COF membrane resulted in 60-70% rejection for three model compounds, Propyl-, Butyl- and Pentyl-benzoic acids, along with 85-90% rejection of the higher-molecular weight organic surrogate, Rhodamine-WT (R-WT), and less than 10% rejection of model inorganic salt, NaCl. The solution-diffusion model was used to determine the permeation parameters for model compounds. The model revealed that a significant portion of the overall permeation was due to advection through imperfections. The model was applied to demonstrate that further refinement of the COF membranes focusing on eliminating the imperfections would result in the model compound rejection increasing to 90-95%.","abstract_html":"Petroleum-produced water is the co-produced aqueous liquid phase along with the oil and/or gas phases during petroleum production operations. It’s considered the largest waste stream associated with oil and gas extraction. The treatment and further reuse of produced water are essential to address environmental protection and global water scarcity challenges. Although there are adequate technologies to remove the bulk of organic matter in produced water, the removal of small organic matter remains a challenge. A novel thin-film composite nanofiltration membrane with an active layer made with a covalent organic framework (COF) developed in the early phases of this study was used to investigate its rejection capability for organic model compounds present in treated produced water. Permeation experiments with the COF membrane resulted in 60-70% rejection for three model compounds, Propyl-, Butyl- and Pentyl-benzoic acids, along with 85-90% rejection of the higher-molecular weight organic surrogate, Rhodamine-WT (R-WT), and less than 10% rejection of model inorganic salt, NaCl. The solution-diffusion model was used to determine the permeation parameters for model compounds. The model revealed that a significant portion of the overall permeation was due to advection through imperfections. The model was applied to demonstrate that further refinement of the COF membranes focusing on eliminating the imperfections would result in the model compound rejection increasing to 90-95%.","abstract_has_math":false,"creators":["Ni, Weiqi"],"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":["Marinas, Benito Jose"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2021,"date_issued":"2021-03-05T21:47:35Z","date_published":"2021-03-05T21:47:35Z","updated_at":"2026-07-22T22:24:50Z","subjects":["Membrane Separation","Nanofiltration","Covalent Organic Frameworks (COFs)","Petroleum Produced Water","Rejection Performance Model"],"languages":["en"],"rights":["Copyright 2020 Weiqi Ni"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/109640","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Marinas, Benito Jose"]},{"key":"dc:creator","label":"Author","values":["Ni, Weiqi"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2021-03-05T21:47:35Z","2023-03-05T21:47:41Z","2020-12-10","2020-12"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"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":["Membrane Separation","Nanofiltration","Covalent Organic Frameworks (COFs)","Petroleum Produced Water","Rejection Performance Model"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2020 Weiqi Ni"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/109640"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Petroleum-produced water is the co-produced aqueous liquid phase along with the oil and/or gas phases during petroleum production operations. It’s considered the largest waste stream associated with oil and gas extraction. The treatment and further reuse of produced water are essential to address environmental protection and global water scarcity challenges. Although there are adequate technologies to remove the bulk of organic matter in produced water, the removal of small organic matter remains a challenge. A novel thin-film composite nanofiltration membrane with an active layer made with a covalent organic framework (COF) developed in the early phases of this study was used to investigate its rejection capability for organic model compounds present in treated produced water. Permeation experiments with the COF membrane resulted in 60-70% rejection for three model compounds, Propyl-, Butyl- and Pentyl-benzoic acids, along with 85-90% rejection of the higher-molecular weight organic surrogate, Rhodamine-WT (R-WT), and less than 10% rejection of model inorganic salt, NaCl. The solution-diffusion model was used to determine the permeation parameters for model compounds. The model revealed that a significant portion of the overall permeation was due to advection through imperfections. The model was applied to demonstrate that further refinement of the COF membranes focusing on eliminating the imperfections would result in the model compound rejection increasing to 90-95%.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-12-01","The student, Weiqi Ni, accepted the attached license on 2020-12-08 at 20:58.","The student, Weiqi Ni, submitted this Thesis for approval on 2020-12-08 at 22:01.","This Thesis was approved for publication on 2020-12-10 at 09:08.","DSpace SAF Submission Ingestion Package generated from Vireo submission #16100 on 2021-03-04 at 16:33:53","Made available in DSpace on 2021-03-05T21:47:35Z (GMT). No. of bitstreams: 2 NI-THESIS-2020.pdf: 4149001 bytes, checksum: 9e237665f595a2527e0792b7dc132589 (MD5) LICENSE.txt: 4205 bytes, checksum: c9f7e9ed6d82d11d3f1a86fbb443609c (MD5) Previous issue date: 2020-12-10","Embargo set by: Seth Robbins for item 117346 Lift date: 2023-03-05T21:47:41Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Author requested closed access (OA after 2yrs) in Vireo ETD system","Limited"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Novel covalent organic framework (COF) thin-film composite nanofiltration membrane for effective removal of organic compounds from petroleum produced water"]}]}],"canonical_facts":{"dc:contributor":["Marinas, Benito Jose"],"dc:creator":["Ni, Weiqi"],"dc:date":["2021-03-05T21:47:35Z","2023-03-05T21:47:41Z","2020-12-10","2020-12"],"dc:description":["Petroleum-produced water is the co-produced aqueous liquid phase along with the oil and/or gas phases during petroleum production operations. It’s considered the largest waste stream associated with oil and gas extraction. The treatment and further reuse of produced water are essential to address environmental protection and global water scarcity challenges. Although there are adequate technologies to remove the bulk of organic matter in produced water, the removal of small organic matter remains a challenge. A novel thin-film composite nanofiltration membrane with an active layer made with a covalent organic framework (COF) developed in the early phases of this study was used to investigate its rejection capability for organic model compounds present in treated produced water. Permeation experiments with the COF membrane resulted in 60-70% rejection for three model compounds, Propyl-, Butyl- and Pentyl-benzoic acids, along with 85-90% rejection of the higher-molecular weight organic surrogate, Rhodamine-WT (R-WT), and less than 10% rejection of model inorganic salt, NaCl. The solution-diffusion model was used to determine the permeation parameters for model compounds. The model revealed that a significant portion of the overall permeation was due to advection through imperfections. The model was applied to demonstrate that further refinement of the COF membranes focusing on eliminating the imperfections would result in the model compound rejection increasing to 90-95%.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-12-01","The student, Weiqi Ni, accepted the attached license on 2020-12-08 at 20:58.","The student, Weiqi Ni, submitted this Thesis for approval on 2020-12-08 at 22:01.","This Thesis was approved for publication on 2020-12-10 at 09:08.","DSpace SAF Submission Ingestion Package generated from Vireo submission #16100 on 2021-03-04 at 16:33:53","Made available in DSpace on 2021-03-05T21:47:35Z (GMT). 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