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.
出处
《环境科学与技术》
CAS
CSCD
北大核心
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)
