Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 엄익환 | - |
dc.date.accessioned | 2017-01-05T02:01:13Z | - |
dc.date.available | 2017-01-05T02:01:13Z | - |
dc.date.issued | 2003 | - |
dc.identifier.issn | 0013-936X | - |
dc.identifier.other | OAK-1759 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/233673 | - |
dc.description.abstract | We investigated the stoichiometry, kinetics, and mechanism of arsenite [As(III)] oxidation by ferrate [Fe(VI)] and performed arsenic removal tests using Fe(VI) as both an oxidant and a coagulant. As(III) was oxidized to As(V) (arsenate) by Fe(VI), with a stoichiometry of 3:2 [As(III):Fe(VI)]. Kinetic studies showed that the reaction of As(III) with Fe(VI) was first-order with respect to both reactants, and its observed second-order rate constant at 25 °C decreased nonlinearly from (3.54 ± 0.24) × 105 to (1.23 ± 0.01) × 103 M-1 s-1 with an increase of pH from 8.4 to 12.9. A reaction mechanism by oxygen transfer has been proposed for the oxidation of As(III) by Fe(VI). Arsenic removal tests with river water showed that, with minimum 2.0 mg L-1 Fe(VI), the arsenic concentration can be lowered from an initial 517 to below 50 μg L-1, which is the regulation level for As in Bangladesh. From this result, Fe(VI) was demonstrated to be very effective in the removal of arsenic species from water at a relatively low dose level (2.0 mg L -1). In addition, the combined use of a small amount of Fe(VI) (below 0.5 mg L-1) and Fe(III) as a major coagulant was found to be a practical and effective method for arsenic removal. | - |
dc.language | English | - |
dc.title | Arsenic(III) Oxidation by Iron(VI) (Ferrate) and Subsequent Removal of Arsenic(V) by Iron(III) Coagulation | - |
dc.type | Article | - |
dc.relation.issue | 24 | - |
dc.relation.volume | 37 | - |
dc.relation.index | SCI | - |
dc.relation.index | SCIE | - |
dc.relation.index | SCOPUS | - |
dc.relation.startpage | 5750 | - |
dc.relation.lastpage | 5756 | - |
dc.relation.journaltitle | Environmental Science and Technology | - |
dc.identifier.doi | 10.1021/es034203+ | - |
dc.identifier.wosid | WOS:000187248000038 | - |
dc.identifier.scopusid | 2-s2.0-0347382328 | - |
dc.author.google | Lee Y. | - |
dc.author.google | Um I.-H. | - |
dc.author.google | Yoon J. | - |
dc.contributor.scopusid | 엄익환(7006725706;6506759437) | - |
dc.date.modifydate | 20230411105538 | - |