期刊
CHEMOSPHERE
卷 182, 期 -, 页码 624-629出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2017.05.065
关键词
Chlorophenol; Peroxymonosulfate; Bromination; Chlorobromoaromatic by-products
资金
- National Natural Science Foundation of China (NSFC) [21377023, 21677031]
- National Key Research and Development Program of China [2016YFC0400501, 2016YFC0400509]
- Shanghai Pujiang Program
- State Key Laboratory of Pollution Control and Resource Reuse Fund [PCRRF16006]
- Fundamental Research funds for Central Universities Central [15D311312]
Trace bromide (Br-) released from industrial effluents or brominated compounds is able to directly react with peroxymonosulfate (PMS) to generate a series of reactive oxidants which can oxidize and also halogenate organics. We report the identification and evolution of by-products during 2,4,6-trichlorophenol (TCP) degradation in the presence of PMS and trace Br-. The influencing factors, including Br- concentration and pH, were investigated. The depletion of TCP was accelerated with increasing trace Br- concentration (0-0.2 mM) and was affected by the initial pH (3.0-7.0). The chlorinated and brominated compounds were identified in simulated wastewater during treatment with PMS. Notably, the potential formation of chlorobromoaromatic by-products was demonstrated for the first time in the presence of PMS and trace Br-. The possible reaction pathways of TCP and its derivatives are discussed. These findings have important implications for the future applications of PMS-based oxidation processes. (C) 2017 Elsevier Ltd. All rights reserved.
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