摘要
研究了甲氰菊酯的主要环境行为———吸附性、移动性、挥发性及土壤降解、水解和光降解的特性。结果表明,甲氰菊酯在土壤中的吸附为物理吸附,吸附常数(Kd)为:粉土43.89,壤土56.49和粘土80.94;在土壤中不易移动,难以挥发;在土壤中的降解半衰期为25.8～33.2d;在pH5,pH7和pH9的水溶液中的水解半衰期分别为33.0,48.4和20.8d;在不同介质中的光降解速率为土壤>玻片>水体。
The main environmental behaviors of fenpropathrin, including absorption, mobility, volatilization, degradation in soil, hydrolysis, and photolysis, were studied. Results showed that absorption constant (Kd) of fenpropathrin in powdery-loamy soil,loam and clay is 43.89,56.49 and 80.94 respectively. Fenpropathrin does not easily move in soil and is difficult to volatilize on the surface of glass,soil and water. The half-life of fenpropathrin degradation in soil is 25.8-33.2 d,and that of hydrolysis in buffer solution at 25℃ is 33.0 d at pH 5,48.4 d at pH 7 and 20.8 d at pH 9,respectively.The photolytic rate of fenpropathrin is the highest in soil, followed by that in glass, and then in water.
出处
《浙江农业学报》
CSCD
2004年第5期299-304,共6页
Acta Agriculturae Zhejiangensis
关键词
甲氰菊酯
环境行为
吸附性
移动性
挥发性
降解性
fenpropathrin
environmental behavior
absorption
mobility
volatilization
degradation
