仲丁威的臭氧去除特性及降解路径研究  

Study on Ozone Removal Characteristics and Degradation Path of Fenobucarb

作　　者：毛磊红 杨宏伟 李殷 田霄艳 MAO Lei-hong;YANG Hong-wei;Li Yin;TIAN Xiao-yan(Shanghai Kangshi Food Technology Co.,Ltd.,Shanghai 201103,China;Tsinghua Suzhou Institute of Environmental Innovation,Suzhou 215000,China;Shenzhen Graduate School of Tsinghua University,Shenzhen 515100,China)

机构地区：[1]上海康识食品科技有限公司,上海201103 [2]清华苏州环境创新研究院,江苏苏州215163 [3]清华大学深圳研究生院,广东深圳518055

出　　处：《饮料工业》2023年第5期49-56,共8页Beverage Industry

摘　　要：臭氧氧化技术是当前饮用水处理中的主流深度处理工艺之一,农药作为新污染物的一类,在臭氧工艺的去除特性和降解路径是保障饮用水安全的重要内容之一。本研究以农药仲丁威为研究对象,通过仲丁威的反应动力学研究其臭氧工艺中的去除特性,进一步采用LC-MS/MS、GC-MS等手段构建中间产物分析方法,研究仲丁威臭氧降解产物,在此基础上推断其降解路径。结果表明,仲丁威可以通过臭氧分解产生的羟基自由基降解,降解率约30%。在仲丁威降解实验中,臭氧降解产物用LC-MS/MS和GC-MS分析总共得到7种,其降解路径主要为仲丁威上的甲基以及苯环是羟基自由基的攻击位点,甲基被氧化生成醛,并进一步生成脱甲基产物,苯环被氧化成醌。研究结果可以为饮用水中仲丁威的控制提供参考。Ozone oxidation technology is one of the mainstream advanced treatment processes in drinking water treatment,and the removal characteristics and degradation paths of pesticides as a new type of pollutants in the ozone process are one of the important contents to ensure the safety of drinking water.In this study,the removal characteristics of the ozone process were studied by the reaction kinetics of the pesticide fenobucarb,and the intermediate product analysis methods were constructed by LC-MS/MS,GC-MS and other means to study the ozone degradation products of fenobucarb,and the degradation path was inferred on this basis.The results showed that fenobucarb can be degraded by hydroxyl radicals produced by ozone decomposition,and the degradation rate is about 30%.In the degradation experiment of fenobucarb,a total of seven ozone degradation products were analyzed by LC-MS/MS and GC-MS,and the degradation path was mainly that the methyl group on fenobucarb and the benzene ring were the attack sites of hydroxyl radicals,and the methyl group was oxidized to generate aldehydes,and further generated demethylation products,and the benzene ring was oxidized to quinone.The results of the study can provide a reference for the control of fenobucarb in drinking water.

关 键 词：农药 仲丁威 臭氧 产物 降解路径 

分 类 号：TS275.1[轻工技术与工程—农产品加工及贮藏工程]