DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bokare, AD | - |
dc.contributor.author | Choi, W | - |
dc.date.accessioned | 2016-03-31T09:15:58Z | - |
dc.date.available | 2016-03-31T09:15:58Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2011-11-01 | - |
dc.identifier.issn | 0013-936X | - |
dc.identifier.other | 2011-OAK-0000024628 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/16916 | - |
dc.description.abstract | Oxidative degradation of aqueous organic pollutants, using 4-chlorophenol (4-CP) as a main model substrate, was achieved with the concurrent H2O2-mediated transformation of Cr(III) to Cr(VI). The Fenton-like oxidation of 4-CP is initiated by the reaction between the aquo-complex of Cr(III) and H2O2, which generates HO center dot along with the stepwise oxidation of Cr(III) to Cr(VI). The Cr(III)/H2O2 system is inactive in acidic condition, but exhibits maximum oxidative capacity at neutral and near-alkaline pH. Since we previously reported that Cr(VI) can also activate H2O2 to efficiently generate HO center dot, the dual role of H2O2 as an oxidant of Cr(III) and a reductant of Cr(VI) can be utilized to establish a redox cycle of Cr(III)-Cr(VI)-Cr(III). As a result, HO center dot can be generated using both Cr(III)/H2O2 and Cr(VI)/H2O2 reactions, either concurrently or sequentially. The formation of HO center dot was confirmed by monitoring the production of p-hydroxybenzoic acid from [benzoic acid + HO center dot] as a probe reaction and by quenching the degradation of 4-CP in the presence of methanol as a HO center dot scavenger. The oxidation rate of 4-CP in the Cr(III)/H2O2 solution was highly influenced by pH, which is ascribed to the hydrolysis of Cr-III(H2O)(n) into Cr-III(H2O)(n-m)(OH)(m) and the subsequent condensation to oligomers. The present study proposes that the Cr(III)/H2O2 combined with Cr(VI)/H2O2 process is a viable advanced oxidation process that operates over a wide pH range using the reusable redox cycle of Cr(III) and Cr(VI). | - |
dc.description.statementofresponsibility | X | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.relation.isPartOf | ENVIRONMENTAL SCIENCE & TECHNOLOGY | - |
dc.subject | HYDROGEN-PEROXIDE | - |
dc.subject | AQUEOUS-SOLUTION | - |
dc.subject | HEXAVALENT CHROMIUM | - |
dc.subject | ORGANIC POLLUTANTS | - |
dc.subject | HYDROXYL RADICALS | - |
dc.subject | HYDROLYTIC DIMER | - |
dc.subject | WATER EXCHANGE | - |
dc.subject | WASTE-WATER | - |
dc.subject | COMPLEXES | - |
dc.subject | CHEMISTRY | - |
dc.title | Advanced Oxidation Process Based on the Cr(III)/Cr(VI) Redox Cycle | - |
dc.type | Article | - |
dc.contributor.college | 환경공학부 | - |
dc.identifier.doi | 10.1021/ES2021704 | - |
dc.author.google | Bokare, AD | - |
dc.author.google | Choi, W | - |
dc.relation.volume | 45 | - |
dc.relation.issue | 21 | - |
dc.relation.startpage | 9332 | - |
dc.relation.lastpage | 9338 | - |
dc.contributor.id | 10105056 | - |
dc.relation.journal | ENVIRONMENTAL SCIENCE & TECHNOLOGY | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Journal Papers | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | ENVIRONMENTAL SCIENCE & TECHNOLOGY, v.45, no.21, pp.9332 - 9338 | - |
dc.identifier.wosid | 000296212700032 | - |
dc.date.tcdate | 2019-01-01 | - |
dc.citation.endPage | 9338 | - |
dc.citation.number | 21 | - |
dc.citation.startPage | 9332 | - |
dc.citation.title | ENVIRONMENTAL SCIENCE & TECHNOLOGY | - |
dc.citation.volume | 45 | - |
dc.contributor.affiliatedAuthor | Choi, W | - |
dc.identifier.scopusid | 2-s2.0-80055087233 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 49 | - |
dc.description.scptc | 43 | * |
dc.date.scptcdate | 2018-05-121 | * |
dc.type.docType | Article | - |
dc.subject.keywordPlus | HYDROGEN-PEROXIDE | - |
dc.subject.keywordPlus | AQUEOUS-SOLUTION | - |
dc.subject.keywordPlus | HEXAVALENT CHROMIUM | - |
dc.subject.keywordPlus | ORGANIC POLLUTANTS | - |
dc.subject.keywordPlus | HYDROXYL RADICALS | - |
dc.subject.keywordPlus | HYDROLYTIC DIMER | - |
dc.subject.keywordPlus | WATER EXCHANGE | - |
dc.subject.keywordPlus | WASTE-WATER | - |
dc.subject.keywordPlus | COMPLEXES | - |
dc.subject.keywordPlus | CHEMISTRY | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Environmental Sciences | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Environmental Sciences & Ecology | - |
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