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dc.contributor.author박현미-
dc.contributor.author홍석원-
dc.contributor.author민기-
dc.contributor.authorKangwoo Cho-
dc.contributor.authorChangha Lee-
dc.date.accessioned2021-06-09T04:19:55Z-
dc.date.available2021-06-09T04:19:55Z-
dc.date.issued2018-08-
dc.identifier.citationVOL 633-359-
dc.identifier.issn0048-9697-
dc.identifier.other50591-
dc.identifier.urihttps://pubs.kist.re.kr/handle/201004/67454-
dc.description.abstract, the ultimate molar yield of NDMA after 6 h of reaction was primarily influenced by [DO] and pH, while marginally affected by initial [RNT] and [NH2Cl]. A kinetic model, prepared in accordance with the reaction sequence of NDMA formation, suggested that the rate determining step was accelerated with increasing [NH2Cl]0, [DO], and pH. A Kinetic study together with ultra-performance liquid chromatography-quadrupole-time of flight mass spectrometer (UPLC-Q-TOF MS) and gas chromatography (GC)/TOF MS analyses in parallel demonstrated that the nitrite ion inhibited the nucleophilic substitution of the terminal amine on NH2Cl, and reduced the pseudo-steady state concentration of N-peroxyl radicals, significantly decreasing the ultimate yields of NDMA.-
dc.description.abstractRanitidine (RNT) has been an important tertiary amine precursor of N-nitrosodimethylamine (NDMA) in chlorine-based water treatment, due to reaction with monochloramine (NH2Cl) with exceptionally high molar yields up to 90%. This study examined the effects of nitrite ions (NO2&#8722-
dc.description.abstract) on the kinetics of NDMA formation during the chloramination of RNT under variable concentrations of dissolved oxygen (DO, 0.7&#8211-
dc.description.abstract7.5 mg/L), RNT (5&#8211-
dc.description.abstract30 μM), NH2Cl (5&#8211-
dc.description.abstract20 mM), NO2&#8722-
dc.description.abstractor NO3&#8722-
dc.description.abstract(0&#8211-
dc.description.abstract2 mM) and pH (5.6&#8211-
dc.description.abstract8.6). In the absence of the NO2&#8722-
dc.publisherThe Science of the total environment-
dc.subjectN-nitrosodimethylamine-
dc.subjectRanitidine-
dc.subjectNitrite ion-
dc.subjectChloramination-
dc.subjectKinetics-
dc.subjectReaction pathway-
dc.titleNitrite ion mitigates the formation of N-nitrosodimethylamine (NDMA) during chloramination of ranitidine-
dc.typeArticle-
dc.relation.page352359-
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