The impact of gamma-irradiation from radioactive liquid wastewater on polymeric structures of nanofiltration (NF) membranes

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dc.contributor.authorChung, Youngkunko
dc.contributor.authorPark, Daeseonko
dc.contributor.authorKim, Hyojeonko
dc.contributor.authorKim, Yuriko
dc.contributor.authorKang, Seoktaeko
dc.date.accessioned2020-10-14T00:55:08Z-
dc.date.available2020-10-14T00:55:08Z-
dc.date.created2020-09-24-
dc.date.created2020-09-24-
dc.date.created2020-09-24-
dc.date.created2020-09-24-
dc.date.created2020-09-24-
dc.date.created2020-09-24-
dc.date.issued2021-02-
dc.identifier.citationJOURNAL OF HAZARDOUS MATERIALS, v.403, pp.123578-
dc.identifier.issn0304-3894-
dc.identifier.urihttp://hdl.handle.net/10203/276541-
dc.description.abstractIn this study, the impacts of gamma-irradiation from the low- and intermediate-level liquid radioactive wastewaters (LILW) to polyamide (PA) structures of nanofiltration (NF) membranes were investigated. As the gamma-irradiation increased to 300 kGy in the aqueous solution at 5 bar, both the salt rejection and the water permeability of NF membranes were decreased from 95.6 ± 0.1%–74.6 ± 0.5%, and from 33.7 ± 0.3 LMH to 21.4 ± 0.5 LMH, respectively. The surface free energy and Young's modulus of the membrane indicated the decrease in hydrophilicity and the increase in fragility of PA structure after gamma-irradiation. X-ray photoelectron spectroscopy and the streaming potential analysis exhibited that the gamma-irradiation resulted the increase in the cross-linked portion of the amide bonding from 28% to 45% due to the gamma-induced new bonding between unbound carboxylic groups and amine groups. Nuclear magnetic resonance analysis confirmed that the poly(p-phenylene) in polyamide structure were changed to poly(cyclohexane) and poly(cyclohexene) by hydrogen radical disproportionation generated from the gamma-irradiated water, and it is responsible to the increase of the cross-linked PA structures. The decrease in salt rejection and water permeability is attributed to the aging of PA structures by gamma-irradiation, thus, should be carefully monitored during the treatment of LILW using NF membrane processes.-
dc.languageEnglish-
dc.publisherELSEVIER-
dc.titleThe impact of gamma-irradiation from radioactive liquid wastewater on polymeric structures of nanofiltration (NF) membranes-
dc.typeArticle-
dc.identifier.wosid000596474100003-
dc.identifier.scopusid2-s2.0-85090711088-
dc.type.rimsART-
dc.citation.volume403-
dc.citation.beginningpage123578-
dc.citation.publicationnameJOURNAL OF HAZARDOUS MATERIALS-
dc.identifier.doi10.1016/j.jhazmat.2020.123578-
dc.contributor.localauthorKang, Seoktae-
dc.contributor.nonIdAuthorKim, Yuri-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorGamma-irradiation-
dc.subject.keywordAuthorPolyamide-
dc.subject.keywordAuthorCross-linking-
dc.subject.keywordAuthorNanofiltration membrane-
dc.subject.keywordAuthorRadioactive liquid wastewater-
dc.subject.keywordPlusREVERSE-OSMOSIS MEMBRANES-
dc.subject.keywordPlusELECTRON-BEAM-
dc.subject.keywordPlusLOW-LEVEL-
dc.subject.keywordPlusDEGRADATION-
dc.subject.keywordPlusREMOVAL-
dc.subject.keywordPlusPERFORMANCE-
dc.subject.keywordPlusPERMEATION-
dc.subject.keywordPlusSEPARATION-
dc.subject.keywordPlusTRANSPORT-
dc.subject.keywordPlusCS-137-
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CE-Journal Papers(저널논문)
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