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Degradation mechanism of cyanide in water using a UV-LED/H2O2/Cu2+ system
DC Field | Value | Language |
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dc.contributor.author | Kim, Tae-Kyoung | - |
dc.contributor.author | Kim, Taeyeon | - |
dc.contributor.author | Jo, Areum | - |
dc.contributor.author | Park, Suhyun | - |
dc.contributor.author | Choi, Kyungho | - |
dc.contributor.author | Zoh, Kyung-Duk | - |
dc.creator | 조경덕 | - |
dc.date.accessioned | 2019-04-25T01:53:45Z | - |
dc.date.available | 2020-04-05T01:53:45Z | - |
dc.date.created | 2019-06-14 | - |
dc.date.created | 2019-06-14 | - |
dc.date.issued | 2018-10 | - |
dc.identifier.citation | Chemosphere, Vol.208, pp.441-449 | - |
dc.identifier.issn | 0045-6535 | - |
dc.identifier.uri | https://hdl.handle.net/10371/149849 | - |
dc.description.abstract | In this study, we developed a UV-LED/H2O2/Cu2+ system to remove cyanide, which is typically present in metal electroplating wastewater. The results showed the synergistic effects of UV-LED, H2O2, and Cu2+ ions on cyanide removal in comparison with UV-LED photolysis, H2O2 oxidation, UV-LED/H2O2, and H2O2/Cu2+ systems. Cyanide was removed completely in 30 min in the UV-LED/H2O2/Cu2+ system, and its loss followed pseudo-first order kinetics. Statistically, both H2O2 and Cu2+ ions showed positive effects on cyanide removal, but Cu2+ ions exhibited a greater effect. The highest cyanide removal rate constant (k = 0.179 min(-1)) was achieved at pH 11, but the lowest was achieved at pH 12.5 (k = 0.064 min(-1)) due to the hydrolysis of H2O2 ( pK(a) of H2O2 = 11.75). The presence of dissolved organic matter (DOM) inhibited cyanide removal, and the removal rate constant exhibited a negative linear correlation with DOM (R-2 = 0.987). The removal rate of cyanide was enhanced by the addition of Zn2+ ions (from 0.179 to 0.457 min(-1)), while the co-existence of Ni2+ or Cr+6 ion with Cu2+ ion reduced cyanide removal. The formation of OH radicals in the UV-LED/H2O2/Cu2+ system was verified using an aminophenyl fluorescence (APF) probe. Cyanate ions and ammonia were detected as the byproducts of cyanide decomposition. Finally, an acute toxicity reduction of 64.6% was achieved in the system within 1 h, despite a high initial cyanide concentration (100 mg/L). In terms of removal efficiency and toxicity reduction, the UV-LED/H2O2/Cu2+ system may be an alternative method of cyanide removal from wastewaters. (C) 2018 Elsevier Ltd. All rights reserved. | - |
dc.language | 영어 | - |
dc.language.iso | en | en |
dc.publisher | Pergamon Press Ltd. | - |
dc.title | Degradation mechanism of cyanide in water using a UV-LED/H2O2/Cu2+ system | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.chemosphere.2018.05.198 | - |
dc.citation.journaltitle | Chemosphere | - |
dc.identifier.wosid | 000441999400050 | - |
dc.identifier.scopusid | 2-s2.0-85049298895 | - |
dc.description.srnd | OAIID:RECH_ACHV_DSTSH_NO:T201814832 | - |
dc.description.srnd | RECH_ACHV_FG:RR00200001 | - |
dc.description.srnd | ADJUST_YN: | - |
dc.description.srnd | EMP_ID:A072570 | - |
dc.description.srnd | CITE_RATE:4.427 | - |
dc.description.srnd | DEPT_NM:환경보건학과 | - |
dc.description.srnd | EMAIL:zohkd@snu.ac.kr | - |
dc.description.srnd | SCOPUS_YN:Y | - |
dc.citation.endpage | 449 | - |
dc.citation.startpage | 441 | - |
dc.citation.volume | 208 | - |
dc.description.isOpenAccess | N | - |
dc.contributor.affiliatedAuthor | Choi, Kyungho | - |
dc.contributor.affiliatedAuthor | Zoh, Kyung-Duk | - |
dc.identifier.srnd | T201814832 | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | ADVANCED OXIDATION PROCESS | - |
dc.subject.keywordPlus | HYDROGEN-PEROXIDE | - |
dc.subject.keywordPlus | AQUEOUS-SOLUTION | - |
dc.subject.keywordPlus | WASTE-WATER | - |
dc.subject.keywordPlus | ALKALINE CONDITIONS | - |
dc.subject.keywordPlus | TOXICITY EVALUATION | - |
dc.subject.keywordPlus | VIBRIO-FISCHERI | - |
dc.subject.keywordPlus | REMOVAL | - |
dc.subject.keywordPlus | DESTRUCTION | - |
dc.subject.keywordPlus | COPPER | - |
dc.subject.keywordAuthor | UV-LED | - |
dc.subject.keywordAuthor | Electroplating wastewater | - |
dc.subject.keywordAuthor | Byproduct | - |
dc.subject.keywordAuthor | Toxicity | - |
dc.subject.keywordAuthor | Microtox | - |
dc.subject.keywordAuthor | copper | - |
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