吡草醚水解动力学的研究

研究了吡草醚在不同pH和温度条件下的降解动力学情况，以及在三种生态水样和土悬液中的水解情况。结果表明，吡草醚在酸性水环境中比较稳定，在中性和碱性环境中易降解；水解反应速率随反应温度的升高而增大；吡草醚在三种生态水中的降解速率较快，降解半衰期分别为：水库水4．56d，河水3．96d，池塘水1．35d；吡草醚在土悬液中降解较快，这与其碱性条件和含量较高的可溶性碳有关。

Study on Hydrolysis Kinetics of Pyraflufen-ethyl

Hydrolysis kinetics of pyraflufen - ethyl at various pH values and temperatures were studied under laboratory conditions, its hydrolysis dynamics in three kinds of natural water and in soil suspension were investigated as well. The results indicated that pyraflufen -ethyl was stable in acid environment, but it hydrolyzed easily under neutral and basic conditions. Reaction rate of pyraflufen - ethyl hydrolysis increased with temperature rising. Hydrolysis rates of pyraflefen - ethyl in natural water were rather rapid, and its degradation of half - life period was 4. 56 days in reservoir water, 3.96 days in river water and 1.35 in pond water respectively. Pyraflefen - ethyl degraded rapidly in soil suspension, Which attributed to the suspensiong alkaline pH and its high content of soluble carbon.