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DC Field | Value | Language |
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dc.citation.endPage | 441 | - |
dc.citation.number | 1-2 | - |
dc.citation.startPage | 433 | - |
dc.citation.title | WATER RESEARCH | - |
dc.citation.volume | 42 | - |
dc.contributor.author | Lee, Changha | - |
dc.contributor.author | Lee, Yunho | - |
dc.contributor.author | Schmidt, Carsten | - |
dc.contributor.author | Yoon, Jeyong | - |
dc.contributor.author | Von Gunten, Urs | - |
dc.date.accessioned | 2023-12-22T09:06:21Z | - |
dc.date.available | 2023-12-22T09:06:21Z | - |
dc.date.created | 2014-11-03 | - |
dc.date.issued | 2008-01 | - |
dc.description.abstract | The potential of ferrate (Fe(VI)) oxidation to remove N-nitrosodimethylamine (NDMA) precursors during water treatment was assessed. Apparent second-order rate constants (kapp) for the reactions of NDMA and its suspected precursors (dimethylamine (DMA) and 7 tertiary amines with DMA functional group) with Fe(VI) were determined in the range of pH 6-12. Four model NDMA precursors (dimethyldithiocarbamate, dimethylaminobenzene, 3-(dimethylaminomethyl)indole and 4-dimethylaminoantipyrine) showed high reactivity toward Fe(VI) with kapp values at pH 7 between 2.6×102 and 3.2×105 M-1 s-1. The other NDMA precursors (DMA, trimethylamine, dimethylethanolamine, dimethylformamide) and NDMA had kapp values ranging from 0.55 to 9.1 M-1 s-1 at pH 7. In the second part of the study, the NDMA formation potentials (NDMA-FP) of the model NDMA precursors and natural waters were measured with and without pre-oxidation by Fe(VI). For most of the NDMA precursors with the exception of DMA, a significant reduction of the NDMA-FP (>95%) was observed after complete transformation of the NDMA precursor. This result was supported by low yields of DMA from the Fe(VI) oxidation of tertiary amine NDMA precursors. Pre-oxidation of several natural waters (rivers Rhine, Neckar and Pfinz) with a high dose of Fe(VI) (0.38 mM=21 mg L-1 as Fe) led to removals of the NDMA-FP of 46-84%. This indicates that the NDMA precursors in these waters have a low reactivity toward Fe(VI) because it has been shown that for fast-reacting NDMA precursors Fe(VI) doses of 20 μM (1.1 mg L-1 as Fe) are sufficient to completely oxidize the precursors. | - |
dc.identifier.bibliographicCitation | WATER RESEARCH, v.42, no.1-2, pp.433 - 441 | - |
dc.identifier.doi | 10.1016/j.watres.2007.07.035 | - |
dc.identifier.issn | 0043-1354 | - |
dc.identifier.scopusid | 2-s2.0-37349026318 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/8121 | - |
dc.identifier.url | http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=37349026318 | - |
dc.identifier.wosid | 000253045900044 | - |
dc.language | 영어 | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | Oxidation of suspected N-nitrosodimethylamine (NDMA) precursors by ferrate (VI): Kinetics and effect on the NDMA formation potential of natural waters | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | N-nitrosodimethylamine (NDMA) | - |
dc.subject.keywordAuthor | ferrate (Fe(VI)) | - |
dc.subject.keywordAuthor | precursor | - |
dc.subject.keywordAuthor | oxidation | - |
dc.subject.keywordAuthor | NDMA formation potential | - |
dc.subject.keywordPlus | UV PHOTOLYTIC MECHANISM | - |
dc.subject.keywordPlus | NICKEL-ENHANCED IRON | - |
dc.subject.keywordPlus | DRINKING-WATER | - |
dc.subject.keywordPlus | DISSOLVED-OXYGEN | - |
dc.subject.keywordPlus | GRANULAR IRON | - |
dc.subject.keywordPlus | PATHWAYS | - |
dc.subject.keywordPlus | PRODUCT | - |
dc.subject.keywordPlus | MITROSODIMETHYLAMINE | - |
dc.subject.keywordPlus | MONOCHLORAMINE | - |
dc.subject.keywordPlus | DIMETHYLAMINE | - |
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