Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6972071 | Journal of Hazardous Materials | 2013 | 8 Pages |
Abstract
Photodegradation has been regarded as the main mechanism for the removal of many halogenated organic pollutants in the environment. The photodegradation of Dechlorane Plus (DP), an emerging contaminant taken worldwide concerns in recent years, was investigated under the irradiation of a xenon lamp. Rapid photodegradation was found under the irradiation of 200-750Â nm light, while the degradation became much slower when the range of light wavelength changed to 280-750Â nm. DP degradation followed the pseudo first-order kinetics. The quantum yields of 200-280Â nm (UV-C) were about 2-3 orders of magnitude higher than 280-320Â nm, and no yields can be detected in 320-750Â nm range, in an agreement with the changing photodegradation rates with wavelength. The photodegradation products were identified as lower chlorinated DPs, implicating a mechanism of reductive dechlorination. No photoisomerization or solvent adducts were observed, and the difference of photodegradation rate between syn- and anti-DP isomers was negligible.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
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Authors
Siwen Wang, Jun Huang, Yang Yang, Gang Yu, Shubo Deng, Bin Wang,