几种水溶性化合物对啶虫脒光解的影响  

EFFECTS OF DISSOLVED COMPOUNDS ON PHOTOLYSIS OF ACETAMIPRID

作　　者：谢国红[1] 刘国光[1] 孙德智[1] 郑立庆[2] 

机构地区：[1]哈尔滨工业大学市政环境工程学院 [2]河南师范大学化学与环境学院,新乡453007

出　　处：《环境化学》2008年第1期29-32,共4页Environmental Chemistry

基　　金：河南省创新人才工程资助项目(教高[2001]513号).

摘　　要：对不同物质在中压汞灯光照下降解水中啶虫脒进行研究,结果表明,啶虫脒的光解可能是直接光解,且符合一级反应动力学,Fe3+对啶虫脒的光解有抑制作用,其抑制作用随着添加浓度的增加而增强,而且Fe3+的添加浓度与啶虫脒的光解半衰期具有显著的正相关关系;NO3-对啶虫脒光解的抑制率在添加浓度为1 mg.l-1时即达到了25.74%,而后随着添加浓度的增加其抑制率稳定在37.62%—41.58%;腐殖酸对啶虫脒光解抑制作用的趋势与Fe3+相似,抑制作用随着添加浓度的增加而增强.这些物质对啶虫脒光解的抑制是由于对光辐射的竞争性吸收引起的.Effects of several dissolved compounds in environment on the photolysis of Acetamiprid under irradiation of medium-pressure mercury lamp were studied.The results showed that Acetamiprid may undergo direct photolysis and the photolysis of Acetamiprid followed first-order kinetics.The presence of Fe^3＋ inhibited the photolysis of acetamiprid,and the inhibiting efficiency increased with increasing of adding concentration of Fe^3＋.Notable correlative relationship was found between the half-time of photolysis of Acetamiprid and adding concentrations of Fe^3＋.The restrained trends increased acutely when adding concentration of NO3^-increased from 1 mg· l^-1 to 5mg· l^-1,and then with the further increasing of adding concentration of NO3^-,the inhibiting rate maintained at 37.62%— 41.58%.The inhibiting rate of humic acid on the photolysis of Acetamiprid increased with increasing concentration of humic acid.The inhibiting effects of these dissolved compounds on photolysis of Acetamiprid were caused by the competing absorption to the irradiation of mercury lamp between the dissolved compound and Acetamiprid.

关 键 词：啶虫脒 氯化铁 硝酸钠 腐殖酸 光解 

分 类 号：S482.3[农业科学—农药学]