KOPRI Repository

Enhanced Removal of Hexavalent Chromium in the Presence of H2O2 in Frozen Aqueous Solutions

Cited 42 time in wos
Cited 41 time in scopus

Full metadata record

DC Field Value Language
dc.contributor.authorKim, Kitae-
dc.contributor.authorKim, Jungwon-
dc.contributor.authorYoon, Ho Il-
dc.contributor.authorChoi, Wonyong-
dc.contributor.authorAlok D. Bokare-
dc.contributor.authorKim, Jaesung-
dc.date.accessioned2018-03-29T06:06:37Z-
dc.date.available2018-03-29T06:06:37Z-
dc.date.issued2015-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/7369-
dc.description.abstractThe reductive transformation of Cr(VI) to Cr(III) by H2O2 in ice was compared with that in water. The reduction of Cr(VI) was significant at ?20 °C (ice), whereas the reduction efficiency was very low at 25 °C (water). This enhanced reduction of Cr(VI) in ice was observed over a wide range of H2O2 concentration (20?1000 μM), pH (3?11), and freezing temperature (?10 to ?30 °C). The observed molar ratio of consumed [H2O2] to reduced [Cr(VI)] in ice was in close agreement with the theoretical (stoichiometric) molar ratio (1.5) for H2O2-mediated Cr(VI) reduction through proton-coupled electron transfer (PCET). The synergistic increase in Cr(VI) reduction in water by increasing the H2O2 and proton concentrations confirms that the freeze concentration of both H2O2 and protons in the liquid brine is primarily responsible for the enhanced Cr(VI) reduction in ice. In comparison, the one-electron reduction of Cr(VI) to Cr(V) and subsequent reoxidation of Cr(V) to Cr(VI) is the major reaction mechanism in aqueous solution. The reduction efficiency of Cr(VI) by H2O2 in the frozen aqueous electroplating wastewater was similar to that in the frozen aqueous deionized water, which verifies the enhanced reduction of Cr(VI) by freezing in real Cr(VI)-contaminated aquatic systems.-
dc.languageKorean-
dc.titleEnhanced Removal of Hexavalent Chromium in the Presence of H2O2 in Frozen Aqueous Solutions-
dc.title.alternative얼음에서 향상된 활성산소종(H2O2)에 의한 독성크롬의 제거반응-
dc.typeArticle-
dc.identifier.bibliographicCitationKim, Kitae, et al. 2015. "Enhanced Removal of Hexavalent Chromium in the Presence of H2O2 in Frozen Aqueous Solutions". <em>ENVIRONMENTAL SCIENCE & TECHNOLOGY</em>, 49(18): 10937-10944.-
dc.citation.titleENVIRONMENTAL SCIENCE & TECHNOLOGY-
dc.citation.volume49-
dc.citation.number18-
dc.identifier.doi10.1021/acs.est.5b02702-
dc.citation.startPage10937-
dc.citation.endPage10944-
dc.description.articleClassificationSCI-
dc.description.jcrRateJCR 2013:3.7037037037037033-
dc.identifier.localId2015-0132-
dc.identifier.scopusid2-s2.0-84941729899-
dc.identifier.wosid000361415800022-
Appears in Collections  
2014-2016, Monitoring of Abrupt Environmental Change in The Ice Shelf System and Reconstruction of Quaternary Deglaciation History in West Antarctica (14-16) / Yoon; Ho Il (PP15010; PP16010; PP14010)
Files in This Item

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse