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dc.contributor.authorSeid, Mingizem Gashaw-
dc.contributor.authorByun, Jeehye-
dc.contributor.authorKim, Wooyul-
dc.contributor.authorCho, Kangwoo-
dc.contributor.authorHong, Seok Won-
dc.date.accessioned2024-01-19T13:00:49Z-
dc.date.available2024-01-19T13:00:49Z-
dc.date.created2022-01-10-
dc.date.issued2022-02-
dc.identifier.issn0304-3894-
dc.identifier.urihttps://pubs.kist.re.kr/handle/201004/115797-
dc.description.abstractWe investigated the effectiveness of photocatalytic pretreatment (PCP) of precursors in minimizing the formation potentials (FPs) of carcinogenic nitrosamines, including N-nitrosodimethylamine (NDMA), N-nitrosodiethylamine (NDEA), and N-nitrosodiethanolamine (NDELA), during water chloramination. A steel mesh substrate with immobilized TiO2 was highly efficient at mitigating nitrosamine formation and removing targeted precursors such as ranitidine, nizatidine, trimebutine, triethanolamine, and metoclopramide. Compared to UVC/H2O2, PCP under UVA irradiation (intensity of 0.67 mW cm(-2)) was more effective for reducing nitrosamine-FPs during post-chloramination. However, the PCP efficacies varied with the water source, pretreatment pH, and irradiation time. For example, PCP of eutrophic water increased the NDMA-FPs, but produced notable reductions (up to 99%) for NDELA-and NDEA-FPs. Shorter irradiation times, up to 15 min, increased the NDELA-FP in triethanolamine, and the NDMA-FP in nizatidine and trimebutine. However, the nitrosamine-FP decreased by > 50% after PCP at a pH > 5.6, following irradiation for 120 min. Oxygen addition, N-de(m)ethylation, and N-dealkylation were responsible for decreasing nitrosamine-FPs via the destruction of key moieties; this has been elucidated by mass spectroscopy. This study suggests that PCP could be used as an alternative strategy for minimizing nitrosamine-FPs during water treatment.-
dc.languageEnglish-
dc.publisherElsevier BV-
dc.titleChanges in levels of N-nitrosamine formed from amine-containing compounds during chloramination via photocatalytic pretreatment with immobilized TiO2: Effect of source water and pH-
dc.typeArticle-
dc.identifier.doi10.1016/j.jhazmat.2021.127398-
dc.description.journalClass1-
dc.identifier.bibliographicCitationJournal of Hazardous Materials, v.424-
dc.citation.titleJournal of Hazardous Materials-
dc.citation.volume424-
dc.description.isOpenAccessN-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.identifier.wosid000711802000001-
dc.identifier.scopusid2-s2.0-85116695231-
dc.relation.journalWebOfScienceCategoryEngineering, Environmental-
dc.relation.journalWebOfScienceCategoryEnvironmental Sciences-
dc.relation.journalResearchAreaEngineering-
dc.relation.journalResearchAreaEnvironmental Sciences & Ecology-
dc.type.docTypeArticle-
dc.subject.keywordPlusNDMA FORMATION-
dc.subject.keywordPlusWASTE-WATER-
dc.subject.keywordPlusNITROSODIMETHYLAMINE NDMA-
dc.subject.keywordPlusALIPHATIC-AMINES-
dc.subject.keywordPlusBY-PRODUCTS-
dc.subject.keywordPlusDEGRADATION-
dc.subject.keywordPlusPHARMACEUTICALS-
dc.subject.keywordPlusSOLAR-
dc.subject.keywordPlusOXIDATION-
dc.subject.keywordPlusPRECURSORS-
dc.subject.keywordAuthorN-nitrosamine formation potential-
dc.subject.keywordAuthorPharmaceuticals-
dc.subject.keywordAuthorPhotocatalysis-
dc.subject.keywordAuthorReaction pathways-
dc.subject.keywordAuthorTriethanolamine-
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