Accelerated oxidation of microcystin-LR by Fe(II)-tetrapolyphosphate/oxygen in the presence of magnesium and calcium ions
DC Field | Value | Language |
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dc.contributor.author | Kim, Min Sik | - |
dc.contributor.author | Lee, Ki-Myeong | - |
dc.contributor.author | Kim, Hak-Hyeon | - |
dc.contributor.author | Lee, Hongshin | - |
dc.contributor.author | Kim, Dae Won | - |
dc.contributor.author | Kim, Jae-Hong | - |
dc.contributor.author | Lee, Changha | - |
dc.date.accessioned | 2021-08-30T12:16:00Z | - |
dc.date.available | 2021-08-30T12:16:00Z | - |
dc.date.created | 2021-06-18 | - |
dc.date.issued | 2020-10-01 | - |
dc.identifier.issn | 0043-1354 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/52522 | - |
dc.description.abstract | Fe(II)-tetrapolyphosphate complexes are known to activate molecular oxygen (Fe(II)-TPP/O-2) to produce reactive oxidants (most likely, Fe(IV)-TPP complexes) that are capable of degrading refractory organic contaminants in water. This study found that magnesium and calcium ions (Mg2+ and Ca2+) accelerate the degradation of micfrocystin-LR (MC-LR), the most toxic and abundant cyanotoxin, by the Fe(II)-TPP/O-2 system. The addition of Mg2+ and Ca2+ increased the observed rate constant of MC-LR degradation by up to 4.3 and 14.8 folds, respectively. Mg2+ and Ca2+ accelerated the MC-LR degradation in the entire pH range, except for the alkaline region with pH > ca. 10. The addition of Mg2+ and Ca2+ also reshaped the pH-dependency of the MC-LR degradation, greatly increasing the rate of MC-LR degradation at neutral pH. It was found that Mg2+ and Ca2+ accelerate the reaction of Fe(II)-TPP complexes with oxygen, resulting in faster production of reactive oxidants. The findings from cyclic voltammetry and potentiometric titration suggest that Mg2+ and Ca2+ form ternary complexes with Fe(II)-TPP, which exhibit higher reactivity with oxygen. Due to the effects of Mg2+ and Ca2+, the rate of MC-LR degradation by the Fe(II)-TPP/O-2 system was even higher in natural water than in deionized water. (c) 2020 Elsevier Ltd. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.subject | ZERO-VALENT IRON | - |
dc.subject | METAL-METAL INTERACTIONS | - |
dc.subject | FERROUS-TETRAPOLYPHOSPHATE | - |
dc.subject | DIOXYGEN ACTIVATION | - |
dc.subject | FERRYL ION | - |
dc.subject | OXYGEN | - |
dc.subject | DEGRADATION | - |
dc.subject | COMPLEXES | - |
dc.subject | OXIDANTS | - |
dc.subject | GENERATION | - |
dc.title | Accelerated oxidation of microcystin-LR by Fe(II)-tetrapolyphosphate/oxygen in the presence of magnesium and calcium ions | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, Hongshin | - |
dc.identifier.doi | 10.1016/j.watres.2020.116172 | - |
dc.identifier.scopusid | 2-s2.0-85087980349 | - |
dc.identifier.wosid | 000589969100015 | - |
dc.identifier.bibliographicCitation | WATER RESEARCH, v.184 | - |
dc.relation.isPartOf | WATER RESEARCH | - |
dc.citation.title | WATER RESEARCH | - |
dc.citation.volume | 184 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Environmental Sciences & Ecology | - |
dc.relation.journalResearchArea | Water Resources | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Environmental Sciences | - |
dc.relation.journalWebOfScienceCategory | Water Resources | - |
dc.subject.keywordPlus | ZERO-VALENT IRON | - |
dc.subject.keywordPlus | METAL-METAL INTERACTIONS | - |
dc.subject.keywordPlus | FERROUS-TETRAPOLYPHOSPHATE | - |
dc.subject.keywordPlus | DIOXYGEN ACTIVATION | - |
dc.subject.keywordPlus | FERRYL ION | - |
dc.subject.keywordPlus | OXYGEN | - |
dc.subject.keywordPlus | DEGRADATION | - |
dc.subject.keywordPlus | COMPLEXES | - |
dc.subject.keywordPlus | OXIDANTS | - |
dc.subject.keywordPlus | GENERATION | - |
dc.subject.keywordAuthor | Microcystin-LR | - |
dc.subject.keywordAuthor | Oxidation | - |
dc.subject.keywordAuthor | Tetrapolyphosphate | - |
dc.subject.keywordAuthor | Ferryl ion | - |
dc.subject.keywordAuthor | Magnesium | - |
dc.subject.keywordAuthor | Calcium | - |
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