Study On The Degradation Process And Environmental Factors Of Organophosphorus Pesticides In Soil

The organophosphorus pesticides (OPPs) are widely used at present in the world. After years of usage, the impact of their toxicity and residues on human health and ecosystems is very serious. It is important to evaluate the OPPs that we should understand their regulation of degradation in soil, which has important and realistic meaning to take the valid preventible measures against the pesticide pollution.In this article, the degradation process of the OPPs and the influences of some environmental factors are further studied. A method based on solid-phase extraction and gas chromatography with nitrogen-phosphorus detector for the determination of OPPs in soil was described The results are as follows: the more the moisture in soil is, the faster the degradation process of OPPs occurs; the temperature has an effect on the soil microbial activity and the hydrolyzation of OPPs, the maximal degradation is at the range of microbial growth and propagation, the OPPs are found to degrade at a lower rate in sterilized and no organic matter soil; the addition of organic organonitrogen fertilizer is good to microbe, and accelerate the degradation of OPPs. The degradation process of the OPPs and the influences of some environmental factors can be characterized by a series of equations.