摘要
对微污染水体中检测出的脲类除草剂敌草隆进行氯化消毒生成卤乙腈(HANs)的潜能研究,主要考察了其在消毒过程中生成二氯乙腈(DCAN)、二溴乙腈(DBAN)的变化规律及影响因素.结果表明:在一定的反应条件下,加氯量和敌草隆浓度的增加会使DCAN、DBAN的生成量增加;溴离子(Br-)在一定的投加浓度下对DCAN的生成具有较大的促进作用;pH值对DCAN和DBAN的生成具有显著的影响,酸性条件下更有利于其生成;延长消毒时间可能增加DCAN、DBAN的生成量,但接触时间过长并不能使DCAN、DBAN有继续增长的趋势;两种生成物中DCAN占的比例较大.
The potential of chlorination of the urea herbicide diuron detected in micro-polluted water to form haloacetonitrile(HANs)was studied.The change rule and influencing factors of dichloroacetonitrile(DCAN)and dibromoacetonitrile(DBAN)during the disinfection process were investigated.The results showed that under certain reaction conditions,the increase of chlorine content and diuron concentration would increase the production of DCAN and DBAN.Br-had a great promoting effect on the formation of DCAN at a certain concentration;pH value had a significant effect on the formation of DCAN and DBAN,which was more favorable under acidic conditions.Extended disinfection time might increase the production of DCAN and DBAN,but too long exposure time could not make DCAN and DBAN continue to grow.DCAN accounted for a larger proportion of the two products.
作者
员建
张抗抗
李威
苑宏英
高富
张平
YUAN Jian;ZHANG Kangkang;LI Wei;YUAN Hongying;GAO Fu;ZHANG Ping(School of Environmental and Municipal Engineering,TCU,Tianjin 300384,China;Tianjin Key Laboratory of Aquatic Science and Technology,TCU,Tianjin 300384,China;School of Energy and Safety Engineering,TCU,Tianjin 300384,China)
出处
《天津城建大学学报》
CAS
2021年第1期40-44,共5页
Journal of Tianjin Chengjian University
基金
国家自然科学基金(51308374)
科技成果转化奖励资助项目(KJZHz-CA-1749)。
关键词
氯化消毒
敌草隆
二氯乙腈
二溴乙腈
chlorination disinfection
diuron
dichloroacetonitrile
dibromoacetonitrile
