甲萘威在水环境中的水解及其影响因素

HYDROLYSIS AND THE INFLUENCING FACTORS OF CARBARYL IN WATER

选择pH值、温度、水质和浓度四个因素对甲萘威在水中水解的影响进行了研究.结果表明,pH值和温度是两个主要的影响因素,碱性和高温都会促使甲萘威的水解反应加快.甲萘威在去离子水中的水解速率和在河水中的水解速率相差不多,但这种差别随pH值的增大而有所增加,说明河水中的一些无机离子和腐殖酸等对甲萘威的水解有一定的影响.而不同浓度的甲萘威也对水解速率有所影响.在pH值为7,温度30℃下,甲萘威很容易水解,其半衰期大约只有120h.

The factors influencing hydrolysis of Carbaryl in water was studied in this paper. We chose four environmental factors which were pH, temperature, matter quality and concentration on the research. The experimental results indicated that pH and temperatures were two main influencing factors. The alkalescence and temperature will urge the hydrolysis of Carbaryl. The hydrolysis rates of Carbaryl in distilled and river water were almost the same, but slightly bigger in distilled water, and the distinction was more bigger in alkalescence water. And the different concentration also influenced the hydrolysis of Carbaryl in water. At pH7, 30 ℃, the Carbaryl hydrolyzed very easyily in water, so the residue of Carbaryl in the environmental water is very small.