Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 박찬혁 | * |
dc.date.accessioned | 2019-11-19T16:30:27Z | - |
dc.date.available | 2019-11-19T16:30:27Z | - |
dc.date.issued | 2017 | * |
dc.identifier.issn | 0043-1354 | * |
dc.identifier.other | OAK-25947 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/251924 | - |
dc.description.abstract | The oxidation of microcystin-LR (MC-LR) in deionized water (DI) and river water using potassium permanganate (KMnO4) at a neutral pH and at 23 +/- 2 degrees C was investigated. These two aqueous systems (i.e., DI and river water) gave comparable second-order rate constants (289.9 and 285.5 M(-)1s(-)1 (r(2) > 0.99), respectively), which confirmed the effectiveness of this oxidation process for the treatment of natural surface water. The presence of either humic or fulvic acid reduced the removal efficiency of MC-LR, with the latter exhibiting a greater inhibitory effect. Monitoring of MC-LR and residual Mn2+ levels with adding KMnO4 (1 mg/L) and powdered activated carbon (PAC, 5-20 mg L-1) before and during coagulation, respectively, revealed that 60 min of permanganate pre-oxidation followed by coagulant addition with PAC was the most effective approach for reducing both levels below limits stated by WHO guidelines. The MC-LR degradation products were the result of oxidation occurring at the diene and aromatic moieties of the Adda (3-amino-9-methoxy-2,6,8-trimethyl-10-phenyldeca-4,6-dienoic acid) side-chain, in addition to amine bond hydrolysis of the Mdha (N-methyldehydroalanine) moiety. Several toxic by-products with an intact Adda chain were observed during the reaction, but completely disappeared after 60 min. This further supports the conclusion that sufficient contact time with permanganate (i.e., >60 min) is essential to reducing the residual toxicity and maximizing the efficiency of MC-LR oxidation when treating raw water. (C) 2017 Elsevier Ltd. All rights reserved. | * |
dc.language | English | * |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | * |
dc.subject | Microcystin-LR | * |
dc.subject | Potassium permanganate | * |
dc.subject | Natural organic matter | * |
dc.subject | Powdered activated carbon | * |
dc.subject | Oxidation by-product | * |
dc.subject | Oxidation pathway | * |
dc.title | Elimination of microcystin-LR and residual Mn species using permanganate and powdered activated carbon: Oxidation products and pathways | * |
dc.type | Article | * |
dc.relation.volume | 114 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 189 | * |
dc.relation.lastpage | 199 | * |
dc.relation.journaltitle | WATER RESEARCH | * |
dc.identifier.doi | 10.1016/j.watres.2017.02.043 | * |
dc.identifier.wosid | WOS:000397695800018 | * |
dc.author.google | Jeong, Boyoung | * |
dc.author.google | Oh, Min-Seok | * |
dc.author.google | Park, Hyun-Mee | * |
dc.author.google | Park, Chanhyuk | * |
dc.author.google | Kim, Eun-Ju | * |
dc.author.google | Hong, Seok Won | * |
dc.contributor.scopusid | 박찬혁(56140966600) | * |
dc.date.modifydate | 20240322131824 | * |