Formation pathways of brominated products from benzophenone-4 chlorination in the presence of bromide ions  

作　　者：Ming Xiao Dongbin Wei Liping Li Qi Liu Huimin Zhao Yuguo Du 

机构地区：[1]Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences [2]University of Chinese Academy of Sciences

出　　处：《Journal of Environmental Sciences》2014年第12期2387-2396,共10页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.20877090,21077123,21377143)

摘　　要：The brominated products, formed in chlorination treatment of benzophenone-4 in the presence of bromide ions, were identified, and the formation pathways were proposed.Under disinfection conditions, benzophenone-4 would undertake electrophilic substitution generating mono- or di-halogenated products, which would be oxidized to esters and further hydrolyzed to phenol derivatives. The generated catechol intermediate would be transformed into furan-like heterocyclic product. The product species were p H-dependent,while benzophenone-4 elimination was chlorine dose-dependent. When the chlorination treatment was performed on ambient water spiked with benzophenone-4 and bromide ions, most of brominated byproducts could be detected, and the acute toxicity significantly increased as well.The brominated products, formed in chlorination treatment of benzophenone-4 in the presence of bromide ions, were identified, and the formation pathways were proposed.Under disinfection conditions, benzophenone-4 would undertake electrophilic substitution generating mono- or di-halogenated products, which would be oxidized to esters and further hydrolyzed to phenol derivatives. The generated catechol intermediate would be transformed into furan-like heterocyclic product. The product species were p H-dependent,while benzophenone-4 elimination was chlorine dose-dependent. When the chlorination treatment was performed on ambient water spiked with benzophenone-4 and bromide ions, most of brominated byproducts could be detected, and the acute toxicity significantly increased as well.

关 键 词：UV-filters BENZOPHENONE CHLORINATION Brominated products Acute toxicity 

分 类 号：X703[环境科学与工程—环境工程]