卤素离子对顺式氯氰菊酯在水中光降解的影响  

Effects of Eight Ions on Photo-Degradation of Cis-Cypermethrion in Water

作　　者：邹雅竹 龚道新[2] 

机构地区：[1]长沙崇德检测科技有限公司,长沙410007 [2]湖南农业大学农业环境保护研究所,长沙410128

出　　处：《价值工程》2016年第23期267-269,共3页Value Engineering

摘　　要：以高压汞灯为光源,研究了水体中存在的几种离子(Na^+、K^+、SO_4^(2-)、Cl^-、Br^-、I^-)对顺式氯氰菊酯光解的影响。实验结果表明Na^+、K^+、SO_4^(2-)这3种离子对顺式氯氰菊酯几乎没有影响,在添加K_2SO_4和Na_2SO_4的情况下顺式氯氰菊酯的光解半衰期与在纯水中的半衰期的相比率分别为1.01及1.02;卤素离子Cl^-、Br^-、I^-均对顺式氯氰菊酯有光猝灭作用,而且随着浓度的增大,猝灭作用增强;这3种卤素离子对顺式氯氰菊酯光猝灭作用的大小为I^->Br^->Cl^-;这说明,在进行各种离子对顺式氯氰菊酯光解研究时,为避免综合因素影响可以选择钠盐或钾盐;另外Cl^-、Br^-、I^-对顺式氯氰菊酯光解有着较大影响。The effects of several anions（Na＋、K＋、SO42-、Cl-、Br-、I-） on the photo-degradation of α-cypermethrin in water were studied under high pressure mercury lamp （HPML）. The results showed that the following anions： Na＋, K＋, SO42- almost had no effects on the photo-degradation of α-cypermethrin; the halogen anions - Cl-, Br-, I- all were quencher to α-cypermethrin and the effects were in positive correlation with its concentration; the effects of three halogen anions on α-cypermethrin were in order of I-〉 Br-〉 Cl-. It can be concluded： we could chose sodium salt or kalium salt for which had no effect on the photo-degradation, meanwhile, Cl-, Br-, I-had great effects on the photo-degradation of α-cypermethrin. Therefore, when assessing the environmental behavior and effect of α-cypermethrin, it is also vital to consider the influence of co-existing anions in water.

关 键 词：光解 顺式氯氰菊酯 离子 猝灭剂 

分 类 号：X592[环境科学与工程—环境工程]