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Dual character of peroxymonosulfate oxidation process to treat salty wastewater containing 2,4,6-tribromophenol

文献类型： 外文期刊

作者： Fang, Changling 1 ; Lou, Xiaoyi 1 ; Tang, Yunyu 1 ; Tian, Liangliang 1 ; Cai, Youqiong 1 ; Xiao, Dongxue 1 ; Guo, Yaog 1 ;

作者机构： 1.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Key Lab Control Qual & Safety Aquat Prod, Minist Agr & Rural Affairs, Shanghai 200090, Peoples R China

2.Fudan Univ, Dept Environm Sci & Engn, Shanghai 200433, Peoples R China

3.Shanghai Polytech Univ, Res Ctr Resource Recycling Sci & Engn, Sch Environm & Mat Engn, Shanghai 201209, Peoples R China

4.City Univ Hong Kong, Dept Phys, Hong Kong 999077, Peoples R China

5.Donghua Univ, Coll Environm Sci & Engn, State Environm Protect Engn Ctr Pollut Treatment, Shanghai 201620, Peoples R China

关键词： 2,4,6-Tribromophenol; Peroxymonosulfate; Chloride; Halogenated products; Non-radical pathways

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：5.909； 五年影响因子：5.649 ）

ISSN：

年卷期： 2020 年 8 卷 4 期

页码：

收录情况： SCI

摘要： Nowadays, increasing attention has been paid on the peroxymonosulfate (PMS) in situ oxidation for environmental decontamination. Chloride ion (Cl-) could directly react with PMS to produce some reactive halogen agents via non-radical pathways. In present study, the degradation kinetics of 2,4,6-tribromophenol (TBP) and the total organic carbon (TOC) removal by adding PMS in salty wastewater were inspected. TBP could effectively degraded by PMS in salty wastewater over the pH range of 3.0 - 7.0, and the degradation ratio increased with the pH of reaction solution. Positive effects of Cl- concentration (1 -100 mM) on TBP degradation kinetics were also examined. Moreover, the oxidation products and their evolution with reaction time were conducted in order to further evaluate the environmental benefits with co-existence of PMS and Cl-. Instead of complete mineralization, TBP was mainly transformed to new halogenated products which also have long half-lives. The chlorination of TBP is the dominant pathway in the presence of Cl-, since the main oxidant (HOCl) played an important role. The formation of undesirable halogenated products provides that adding PMS into salty wastewater might not be an unexpected proposal for TBP depletion involving of the attendance of chloride.

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