Hydrogen peroxide decomposition on manganese oxide (pyrolusite): Kinetics, intermediates, and mechanism
DC Field | Value | Language |
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dc.contributor.author | Do, Si-Hyun | - |
dc.contributor.author | Batchelor, Bill | - |
dc.contributor.author | Lee, Hong-Kyun | - |
dc.contributor.author | Kong, Sung-Ho | - |
dc.date.accessioned | 2022-12-20T23:10:03Z | - |
dc.date.available | 2022-12-20T23:10:03Z | - |
dc.date.created | 2022-08-26 | - |
dc.date.issued | 2009-03 | - |
dc.identifier.issn | 0045-6535 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/177180 | - |
dc.description.abstract | The objective of this study is the kinetic interpretation of hydrogen peroxide decomposition on manganese oxide (pyrolusite) and the explanation of the reaction mechanism including the hydroperoxide/superoxide anion. The decomposition of hydrogen peroxide on manganese oxide at pH 7 was represented by a pseudo first-order model. The maximum value of the observed first-order rates constants (k(obs)) was 0.741 min(-1) at 11.8 of [H2O2]/[= MnO2] when [H2O2]/[= MnO2] were ranged from 58.8 to 3.92. The pseudo first-order rate constants (k(MnO2)) approximated as the average value of 0.025 (min mM)(-1) with a standard deviation of 0.003 at [H2O2]/[= MnO2] ranged from 39.2 to 11.8. When [H2O2]/[= MnO2] was 3.92, the rate constants (k(MnO2)) was 0.061 (min mM)(-1) as maximum. Oxygen production showed that the initial rates increased with decreasing [H2O2]/[= MnO2] and the total amounts of oxygen was slightly less than the stoichiometric value (0.5) in most experiments. However, oxygen was produced at more than 0.5 in low [H2O2]/[= MnO2] (i.e. 3.92 and 9.79). The relative production of hydroperoxide/superoxide anion implied that the production increased with low [H2O2]/[= MnO2], and the existence of anions Suggested that the mechanism includes propagation reactions with intermediates such as hydroperoxide/Superoxide anion in solution. In addition, both [H2O2] decomposition and the production of anion were accelerated in alkaline solution. Manganese ion dissolved into solution was negligible in neutral and alkaline conditions, but it greatly increased in acidic conditions. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | Hydrogen peroxide decomposition on manganese oxide (pyrolusite): Kinetics, intermediates, and mechanism | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Do, Si-Hyun | - |
dc.identifier.doi | 10.1016/j.chemosphere.2008.11.075 | - |
dc.identifier.scopusid | 2-s2.0-61549139398 | - |
dc.identifier.wosid | 000265006300002 | - |
dc.identifier.bibliographicCitation | CHEMOSPHERE, v.75, no.1, pp.8 - 12 | - |
dc.relation.isPartOf | CHEMOSPHERE | - |
dc.citation.title | CHEMOSPHERE | - |
dc.citation.volume | 75 | - |
dc.citation.number | 1 | - |
dc.citation.startPage | 8 | - |
dc.citation.endPage | 12 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Environmental Sciences & Ecology | - |
dc.relation.journalWebOfScienceCategory | Environmental Sciences | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | CONTAMINANTS | - |
dc.subject.keywordPlus | DEGRADATION | - |
dc.subject.keywordPlus | WATER | - |
dc.subject.keywordAuthor | Hydrogen peroxide | - |
dc.subject.keywordAuthor | Manganese oxide | - |
dc.subject.keywordAuthor | [H2O2]/[= MnO2] | - |
dc.subject.keywordAuthor | Hydroperoxide/superoxide anion | - |
dc.subject.keywordAuthor | Pseudo first-order model | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S0045653508014914?via%3Dihub | - |
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