苄嘧磺隆氯胺化降解及其消毒副产物研究  

BENSULFURON-METHYL CHLORIDE AMINATION DEGRADATION AND ITS DISINFECTION BY-PRODUCTS

作　　者：程明[1] 胡晨燕[1] 凌晓[1] 谷建[1] 

机构地区：[1]上海电力学院环境与化学工程学院,上海200090

出　　处：《水处理技术》2015年第6期62-66,共5页Technology of Water Treatment

基　　金：国家自然科学基金(41301536)

摘　　要：为了解氯胺化降解苄嘧磺隆的行为,对其动力学进行研究,反应在室温((25±1)℃)进行。研究发现,该反应是一个2级反应,在p H为6时反应速率最快,而在p H为9时反应速率最慢。氯胺化苄嘧磺隆的主要反应是一氯胺与电离和非电离的苄嘧磺隆的反应。少量的溴化物存在能够抑制苄嘧磺隆氯胺化的反应,但是随着溴化物含量的增加,反应速率加快。通过气相色谱检测发现,4种苄嘧磺隆氯胺化后的产物分别为三氯甲烷、二氯乙腈、三氯丙酮和三氯硝基甲烷,其中二氯乙腈为主要产物,在p H为7时含量最大。当溴化物存在时,苄嘧磺氯化胺将增加公众健康的潜在风险。Abe-act： The kinetics of bensulfuron-methyl chloride amination were studied at room temperature of （25 ＋ 1） ~C, and the process could be well described by a second-order kinetics model. Bensulfuron-methyl was inspected to react with aqueous chloramine with the maximum reaction rate constant at pH being 6 and minimum at pH being 9. The predominant reactions were the reactions between chloramine and ionized/nonionized bensulfuron-methyl. It was found that a small amount of bromide inhibited the bensulfuron-methyl chloride amination. However, reaction rate increases with an increasing of the concent of bromide. Four volatile disinfection by-products were identified after bensulfuron-methyl chloride amination, including chloroform, dichloroacetonitrile, 1,1,1-trichloroacetone and by gas chromatograph. Dichloroacetonitrile was the dominant species which reached a maximum with pH being 7. Densulfuron-methyl chloride amination could cause potential risks to public health especially with the existence of bromide

关 键 词：苄嘧磺隆 氯胺化 二氯乙腈 消毒副产物 除草剂 

分 类 号：X712[环境科学与工程—环境工程]