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Kinetics of oxidative decolorization and mineralization of Acid Orange 7 by dark and photoassisted Co2+-catalyzed peroxymonosulfate system.
Chemosphere. 2007 Mar; 67(4):802-8.C

Abstract

A kinetic model was proposed and used to interpret the experimental data for degradation of Acid Orange 7 (AO7) in aqueous solution induced by Co(2+)/peroxymonosulfate (Co/PMS) reagent in terms of both decolorization and mineralization. The pseudo first-order decolorization rate constants are related to [Co(2+)], [PMS], reciprocal of [H(+)] and [AO7](0). Activation energy of the AO7 decolorization process was determined to be 75.7 kJ mol(-1). UV and visible light can accelerate the decolorization and mineralization process due to different mechanisms. In the combined UV/Co/PMS system, UV light can decompose PMS to generate hydroxyl ((*)OH) and sulfate radicals (SO(4)(*-)), while in the Vis/Co/PMS system, excited AO7 molecules can transfer electrons to PMS or Co(3+) and thus accelerate the decomposition of PMS and catalytic cycle of Co(3+)/Co(2+).

Authors+Show Affiliations

Department of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian, Liaoning Province 116024, PR China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17156815

Citation

Chen, Xiaoyang, et al. "Kinetics of Oxidative Decolorization and Mineralization of Acid Orange 7 By Dark and Photoassisted Co2+-catalyzed Peroxymonosulfate System." Chemosphere, vol. 67, no. 4, 2007, pp. 802-8.
Chen X, Qiao X, Wang D, et al. Kinetics of oxidative decolorization and mineralization of Acid Orange 7 by dark and photoassisted Co2+-catalyzed peroxymonosulfate system. Chemosphere. 2007;67(4):802-8.
Chen, X., Qiao, X., Wang, D., Lin, J., & Chen, J. (2007). Kinetics of oxidative decolorization and mineralization of Acid Orange 7 by dark and photoassisted Co2+-catalyzed peroxymonosulfate system. Chemosphere, 67(4), 802-8.
Chen X, et al. Kinetics of Oxidative Decolorization and Mineralization of Acid Orange 7 By Dark and Photoassisted Co2+-catalyzed Peroxymonosulfate System. Chemosphere. 2007;67(4):802-8. PubMed PMID: 17156815.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Kinetics of oxidative decolorization and mineralization of Acid Orange 7 by dark and photoassisted Co2+-catalyzed peroxymonosulfate system. AU - Chen,Xiaoyang, AU - Qiao,Xianliang, AU - Wang,Degao, AU - Lin,Jing, AU - Chen,Jingwen, Y1 - 2006/12/06/ PY - 2006/06/29/received PY - 2006/10/02/revised PY - 2006/10/04/accepted PY - 2006/12/13/pubmed PY - 2007/5/19/medline PY - 2006/12/13/entrez SP - 802 EP - 8 JF - Chemosphere JO - Chemosphere VL - 67 IS - 4 N2 - A kinetic model was proposed and used to interpret the experimental data for degradation of Acid Orange 7 (AO7) in aqueous solution induced by Co(2+)/peroxymonosulfate (Co/PMS) reagent in terms of both decolorization and mineralization. The pseudo first-order decolorization rate constants are related to [Co(2+)], [PMS], reciprocal of [H(+)] and [AO7](0). Activation energy of the AO7 decolorization process was determined to be 75.7 kJ mol(-1). UV and visible light can accelerate the decolorization and mineralization process due to different mechanisms. In the combined UV/Co/PMS system, UV light can decompose PMS to generate hydroxyl ((*)OH) and sulfate radicals (SO(4)(*-)), while in the Vis/Co/PMS system, excited AO7 molecules can transfer electrons to PMS or Co(3+) and thus accelerate the decomposition of PMS and catalytic cycle of Co(3+)/Co(2+). SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/17156815/Kinetics_of_oxidative_decolorization_and_mineralization_of_Acid_Orange_7_by_dark_and_photoassisted_Co2+_catalyzed_peroxymonosulfate_system_ DB - PRIME DP - Unbound Medicine ER -