摘要
本文提出滴滴涕(DDT)的环境接触量可用农田土壤DDT的实际含量来表示,此量应等于当年的施用量与土壤中累积的残留量之和。为求得历年土壤DDT的实际含量,施用量可用有历史记录的销售量表示,残留量可按DDT在土壤中的降解规律求出。如将DDT的此种推算值逐年列出,即可视之为DDT的历史性环境接触量。本文用此法求出了天门县的有关数据,并用当地土壤和鸡体与人体脂肪中DDT的测定值作了验证。
It suggests that the environmental exposure of DDT can be exsressed as the actual content of DDT in agricultural soil which should be equal to the sum of both the application of DDT and its residu- al accumulation in the same year. In order to gain the actual content of DDT in soil over the years. the application of DDT can be collected from its sale volume recorded in the local statistic data, and its residual accumulation can be calculated according to the role of DDT degradation in soil. It could be refered to as the historic environmental exposure of DDT when the calculation as mentioned above is listed year by year. In this paper, the calculation of DDT in T. City is gained and checked and verified by the data of DDT determined in soil and in chickens and human adipose tissues in the area.
