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Lee, Changha
Advanced Redox Technology (ART) Lab
Research Interests
  • Water Treatment, Advanced Oxidation/Reduction, Water Chemistry, Environmental Catalyst


Application of photoactivated periodate to the decolorization of reactive dye: reaction parameters and mechanism

DC Field Value Language Lee, Changha ko Yoon, J ko 2014-11-03T00:33:15Z - 2014-10-31 ko 2004-07 -
dc.identifier.citation JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, v.165, no.1-3, pp.35 - 41 ko
dc.identifier.issn 1010-6030 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract The decolorization of the reactive dye, reactive black 5 (RB5), by the photoactivated periodate (UV/IO4 -) was investigated under ultraviolet (UV) irradiation at 254 nm, and its possible mechanism based on periodate photochemistry was discussed, in order to elucidate the main oxidants involved in the decolorization of RB5 as the reaction parameters, such as the light intensity, periodate concentration, dissolved oxygen, and solution pH, were varied, with the intermittent employment of an •OH scavenger. The decolorization rate of RB5 increased linearly with increasing light intensity. The decolorization rate was found to increase at low periodate concentrations (0-5 mM), but slightly decrease at higher concentrations (>5 mM). Dissolved oxygen did not have any measurable effect on the decolorization rate of the reactive dye. No pH dependence of the decolorization rate was observed over the pH range of 1.5-10, regardless of the periodate speciation. Based on these results, the main oxidants responsible for the RB5 decolorization with UV 254 were found to be •OH and IO3 • (IVI•), after considering the six intermediate species which are reported to be produced as a result of periodate photolysis, namely the radical species (•OH, IO3 •, and IO4 •;) and the non-radical species (O3, IO4 -, and IO3 -). ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher ELSEVIER SCIENCE SA ko
dc.subject Advanced oxidation ko
dc.subject Periodate ko
dc.subject Reactive dye ko
dc.subject Ultraviolet irradiation ko
dc.title Application of photoactivated periodate to the decolorization of reactive dye: reaction parameters and mechanism ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-3042840957 ko
dc.identifier.wosid 000222693900006 ko
dc.type.rims ART ko
dc.description.wostc 28 *
dc.description.scopustc 29 * 2015-05-06 * 2014-10-31 *
dc.identifier.doi 10.1016/j.jphotochem.2004.02.018 ko
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