Sulfate radical-induced degradation of 2,4,6-trichlorophenol: A de novo formation of chlorinated compounds

被引：101

作者：

Xu, Lei ^{[1
]}

Yuan, Ruixia ^{[1
]}

Guo, Yaoguang ^{[1
]}

Xiao, Dongxue ^{[1
]}

Cao, Yuan ^{[1
]}

Wang, Zhaohui ^{[1
]}

Liu, Jianshe ^{[1
]}

机构：

[1] Donghua Univ, Coll Environm Sci & Engn, State Environm Protect Engn Ctr Pollut Treatment, Shanghai 201620, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2013年 / 217卷

关键词：

Sulfate radical; Degradation kinetics; Chlorine radical; Chlorinated byproducts; Degradation pathway; AQUEOUS-SOLUTIONS; OXIDATION; PEROXYMONOSULFATE; CHLOROPHENOLS; TRICHLOROPHENOL; PHOTOLYSIS; ACTIVATION; WATER;

D O I：

10.1016/j.cej.2012.11.112

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The degradation of 2,4,6-trichlorophenol (TCP) by sulfate radical generated via Co(II)-mediated activation of peroxymonosulfate (PMS) was examined. The influencing factors, such as substrate concentration and pH were investigated. The initial pH and its adjustment orders significantly affected the TCP degradation and mineralization. Several chlorinated products were detected, as well as some carboxylic acids, such as glycolic acid and oxalic acid. Many polychlorinated (chlorine atom number >= 3) aromatics (e.g. 2,4,5-trichlorophenol, 2,3,4,6-tetrachlorophenol, 2,3,5,6-tetrachloro-1,4-benzenediol) and even their ring-opening products (e.g. 2,4-dichloro-5-oxo-2-hexenedioic acid, 1,1,3,3-tetrachloro-2-propanone) were identified, indicating a de novo formation mechanism of organohalogens may be involved in TCP degradation. The released chlorine atoms from TCP and/or dichloride radicals activated by sulfate radicals played an important role. This finding may have significant scientific and technical implications for utilizing Co/PMS reagent to detoxify chlorinated pollutants. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：169 / 173

页数：5

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