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Photobleaching and mineralization of Orange II by oxone and metal-ions involving Fenton-like chemistry under visible light
被引:72
作者:
Fernandez, J
[1
]
Maruthamuthu, P
[1
]
Kiwi, J
[1
]
机构:
[1] Swiss Fed Inst Technol, Inst Mol Chem & Biol, Lab Photon & Interface, CH-1015 Lausanne, Switzerland
关键词:
Orange II photobleaching;
Orange II mineralization;
peroxymonosulfate;
oxone;
metal-cations;
photocatalysis;
D O I:
10.1016/S1010-6030(03)00293-4
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Cu2+ and Fe3+ significantly improved the Orange II photobleaching and mineralization in the presence of oxone. In the presence of Cu2+ and Fe3+ the oxone needed for the photobleaching and total mineralization of the dye was determined along other solution parameters. In air, the photobleaching of Orange II in solution was observed to be complete within 60 rain for Cu2+-ions and 30 min for Fe3+-ions showing a considerable faster kinetics with respect to other treatment systems reported until now. The transition metal-ions used seem to couple with oxone forming high oxidizing sulfate species. A reaction mechanism leading to Orange II photobleaching is suggested through a complex formation between the metal-ion and Orange II involves redox reactions activated by visible light. (C) 2004 Elsevier B.V. All rights reserved.
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页码:185 / 192
页数:8
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