摘要
通过模拟实验,研究了呋虫胺在水中的光解特性及其影响因素.实验结果表明,呋虫胺在水中的光解速率随着初始浓度的升高而减慢,随pH的增加而逐渐加快,其在pH为5、7、8和9的条件下的光解半衰期分别为12.42h、12.06h、10.84h和8.45h;三价铁离子对呋虫胺的光解有敏化作用,铁离子的浓度越高,对呋虫胺光反应的敏化作用越强;硝酸根离子对呋虫胺的光解也有敏化作用,添加的硝酸根离子的浓度越高,呋虫胺的光解速率越快;腐植酸对呋虫胺的光解有猝灭作用,腐植酸的浓度越高,对呋虫胺光反应的猝灭作用越强.对呋虫胺的分解产物进行分析,推测出呋虫胺在水中的光化学降解机理.
Through the simulation experiment, the photolysis characteristic of dinotefuran and the factors influencing the photolysis of dinotefuran in water were studied. The results showed that the photodegration rate of dinotefuran decreases with the increased of initial concentration or pH of aqueous solution. The photolysis half-life was of dinotefuran in buffer solution of pH5, pH7, pH8 and pH9 was 12.42 h, 12.06 h,10.84 h and 8. 45 h respectively. Ferric iron and nitrate ions had photosensitization on dinotefuran. Humic acid （HA） had photoquenching on dinotefuran, and its photoquenehing efficiency was positively related to the dosage of humic acid.
出处
《河南师范大学学报（自然科学版）》
CAS
北大核心
2015年第1期93-99,共7页
Journal of Henan Normal University(Natural Science Edition)
基金
河南省基础与前沿技术研究计划项目(122300410286)
关键词
呋虫胺
光解
光敏化
光猝灭
dinotefuran
photolysis
photosensitization
photoquenching
