Surface modification of nanofiltration membranes to improve the removal of organic micro-pollutants (EDCs and PhACs) in drinking water treatment: Graft polymerization and cross-linking followed by functional group substitution
DC Field | Value | Language |
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dc.contributor.author | Kim, Jae-Hyuk | - |
dc.contributor.author | Park, Pyung-Kyu | - |
dc.contributor.author | Lee, Chung-Hak | - |
dc.contributor.author | Kwon, Heock-Hoi | - |
dc.date.available | 2018-05-10T15:58:18Z | - |
dc.date.created | 2018-04-17 | - |
dc.date.issued | 2008-08-15 | - |
dc.identifier.issn | 0376-7388 | - |
dc.identifier.uri | http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/16820 | - |
dc.description.abstract | A commercially available thin film composite (TFC) polyamide (PA) nanofiltration (NF) membrane was chemically modified to improve its rejection capacity for selected organic micro-pollutants categorized as endocrine disrupting chemicals (EDCs) and pharmaceutically active compounds (PhACs): bisphenol-A (BPA), ibuprofen, and salicylic acid. The raw NF membrane was altered using the following modification sequence: graft polymerization (methacrylic acid (MA)-membrane); cross-linking of grafted polymer chains (ethylene diamine (ED)-membrane); and, substitution of functional groups (succinic acid (SA)membrane). Attenuated total reflective Fourier transform infrared (ATR-FTIR) was used to verify each modification in the sequence: the formation of amide bonds; graft polymerization and cross-linking; and, increased carboxylic acids on the modified membrane. Based on zeta-potential and contact angle measurements, graft polymerization increased the negative charge and hydrophilicity of the raw membrane, while cross-linking replaced carboxylic acid with amide bonds, which made the modified membrane almost neutral at pH 6.5. The water fluxes of the ED- and SA-membranes were similar to that of the raw membrane; however, the water flux of the MA-membranes varied with polymerization time (the membrane polymerized for 15 min revealed >= 20% higher flux than the raw membrane). BPA rejection by the raw membrane was substantially improved from 74% to >= 95% after this series of modifications. However, the rejection capacity of the ED-membrane for ibuprofen and salicylic acid was slightly reduced compared with those of the MA-membrane, which was polymerized for 15 min, due to the lack of an electrical repulsion mechanism. The SA-membrane recovered its negative surface charge and showed a clear enhancement in the rejection of all pollutants. (c) 2008 Elsevier B.V. All rights reserved. | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.relation.isPartOf | JOURNAL OF MEMBRANE SCIENCE | - |
dc.subject | ENDOCRINE DISRUPTING COMPOUNDS | - |
dc.subject | REVERSE-OSMOSIS MEMBRANES | - |
dc.subject | BISPHENOL-A | - |
dc.subject | ULTRAFILTRATION MEMBRANES | - |
dc.subject | ELECTROCHEMICAL TREATMENT | - |
dc.subject | ACTIVE COMPOUNDS | - |
dc.subject | NF/RO MEMBRANES | - |
dc.subject | FATE | - |
dc.subject | PHARMACEUTICALS | - |
dc.subject | ENVIRONMENT | - |
dc.title | Surface modification of nanofiltration membranes to improve the removal of organic micro-pollutants (EDCs and PhACs) in drinking water treatment: Graft polymerization and cross-linking followed by functional group substitution | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.memsci.2008.04.055 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | JOURNAL OF MEMBRANE SCIENCE, v.321, no.2, pp.190 - 198 | - |
dc.description.journalClass | 1 | - |
dc.identifier.wosid | 000258166700009 | - |
dc.identifier.scopusid | 2-s2.0-46149083934 | - |
dc.citation.endPage | 198 | - |
dc.citation.number | 2 | - |
dc.citation.startPage | 190 | - |
dc.citation.title | JOURNAL OF MEMBRANE SCIENCE | - |
dc.citation.volume | 321 | - |
dc.contributor.affiliatedAuthor | Kwon, Heock-Hoi | - |
dc.type.docType | Article | - |
dc.subject.keywordAuthor | endocrine disrupting chemicals | - |
dc.subject.keywordAuthor | pharmaceutically active compounds | - |
dc.subject.keywordAuthor | nanofiltration | - |
dc.subject.keywordAuthor | membrane modification | - |
dc.subject.keywordPlus | ENDOCRINE DISRUPTING COMPOUNDS | - |
dc.subject.keywordPlus | REVERSE-OSMOSIS MEMBRANES | - |
dc.subject.keywordPlus | BISPHENOL-A | - |
dc.subject.keywordPlus | ULTRAFILTRATION MEMBRANES | - |
dc.subject.keywordPlus | ELECTROCHEMICAL TREATMENT | - |
dc.subject.keywordPlus | ACTIVE COMPOUNDS | - |
dc.subject.keywordPlus | NF/RO MEMBRANES | - |
dc.subject.keywordPlus | FATE | - |
dc.subject.keywordPlus | PHARMACEUTICALS | - |
dc.subject.keywordPlus | ENVIRONMENT | - |
dc.description.journalRegisteredClass | scopus | - |
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