臭氧氧化内分泌干扰物灭多威  

Oxidation of Methomyl by O_3

作　　者：李绍峰[1] 梁媛[2] 张荣全[3] 

机构地区：[1]深圳职业技术学院建工系,深圳518055 [2]东北农业大学理学院,哈尔滨150030 [3]山东省农药检定所,济南250100

出　　处：《环境科学与技术》2007年第11期27-29,共3页Environmental Science & Technology

基　　金：深圳市科技局资助项目(06KJD036)

摘　　要：采用O3氧化去除水中内分泌干扰物灭多威,通过投加腐殖酸、过氧化氢及羟自由基抑制剂碳酸根离子和叔丁醇,考察灭多威的去除效果。结果表明臭氧能有效去除水中微量灭多威,灭多威初始浓度1.5mg/L时,去除率可达92.7%;腐殖酸浓度增大,则显示出越来越强的竞争作用;碳酸氢根和叔丁醇也在一定程度上抑制了灭多威的去除;过氧化氢的投加并未显著提高灭多威的降解率,说明在臭氧氧化灭多威的反应过程中,臭氧直接氧化占主要部分,而羟自由基间接氧化为次要因素。The representative endocrine disrupters(EDCs)Methomyl was oxidized by O3 and the impact of humic acid, hydrogen peroxide and hydroxyl radical inhibitor hydrogen carbonate ion and tert-butyl alcohol (TBA) on the Methomyl removal was discussed. The removal efficiency could reach 92.7% when the Methomyl content was 1.5mg/l,which showed O3 could removal microdosage Methomyl effectively. It showed more and more competing effect on the removal efficiency along with increasing of the humic acid content. Also the degradation ratio was affected by hydrogen carbonate ion and TBA. Moreover, the addition of hydrogen peroxide could not improve the removal efficiency remarkably. All of this indicated during the O3 oxidation course of Methomyl, the removal of Methomyl was mainly account for the O3 direct oxidation, whereas the hydroxyl radical indirect degradation was side effect.

关 键 词：内分泌干扰物 灭多威 臭氧 羟自由基 氧化 

分 类 号：X131.2[环境科学与工程—环境科学]