Formation of hydroxylated and dimeric intermediates during oxidation of chlorinated phenols in aqueous solution
Formation of hydroxylated and dimeric intermediates during oxidation of chlorinated phenols in aqueous solution
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DOI：
10.1016/s0045-6535(99)00548-2
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发表时间：
2000-10-01
期刊：
影响因子：
8.8
通讯作者：
Tarhanen, J
中科院分区：
文献类型：
--
作者：
Hirvonen, A;Trapido, M;Tarhanen, J
采用UV/H_2O_2和O-3法研究了水溶液中对氯苯酚（2-氯苯酚、4-氯苯酚、2，4-二氯苯酚、2，4，6-三氯苯酚、2，3，4，6-四氯苯酚和五氯苯酚）的氧化反应。氧化中间体的形成进行了测量，以阐明其在处理氯酚的重要性。结果表明，所研究的方法能有效地处理氯酚类化合物，但对氯酚类化合物的脱氯效果不理想。乙酰化萃取馏分中的中间体的分析表明，氯酚的羟基化和二聚体产物的形成参与在两个处理过程中的氯酚的氧化。检测到的大多数中间体是一过性的，因此在延长的处理时间后无法检测到。中间体的复杂混合物的存在表明需要进行毒性测试，以确认氯酚的化学氧化的解毒效果。(C)2000爱思唯尔科技有限公司版权所有。
The oxidation of selected chlorophenols (2-chlorophenol, 4-chlorophenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol, 2,3,4,6-tetrachlorophenol and pentachlorophenol) was studied in aqueous solutions using UV/H2O2 and O-3 methods. The formation of oxidation intermediates was measured to elucidate their importance in the treatment of chlorophenols. Results indicated that chlorophenols can be treated efficiently by the methods studied, but the dechlorination of the compounds was insufficient. Analysis of intermediates in the acetylated extraction fractions showed that hydroxylation of chlorophenols and formation of dimeric products were involved in the oxidation of chlorophenols in both treatment processes. The majority of the intermediates detected were transient, and thus were not detectable after an extended treatment time. The presence of a complicated mixture of intermediates suggests the need for toxicity testing to confirm the detoxifying effect of the chemical oxidation of chlorophenols. (C) 2000 Elsevier Science Ltd. All rights reserved.