某冶炼厂周边土壤环境Cd元素现状调查、污染预警及综合治理

对某冶炼厂以南约30km^3的区域进行了Cd元素土壤地球化学调查，分析了造成Cd富集的原因。通过统计分析，总结了土壤中Cd含量的空间分布特征(包括区域分布和垂向分布)，并结合Cd元素的赋存形式、迁移机制对这些特征的成因进行了较为具体的解释。计算了该区cd的污染指数，以及受不同程度污染的土壤面积占研究区面积的百分比。运用“化学定时炸弹”的理论，对该区土壤达到I}缶界含量的年限进行了估测。针对该区的污染来源及状况，提出了综合治理对策。

The Current Investigation, Polluting Fore-warning and Comprehensive Management of the Element Cd in the Soil Condition around a Smelter

This paper introduces the soil geochemical investigation about the element Cd in the area of 30km 2 south of a smelter. It analyzes the causes for the rich concentration of Cd and sums up the characteristics of spatial distribution(regional distribution and vertical distribution) of Cd in the soil. It also explains the cause for the formation of above characteristics with the occurrence form and migration mechanism of Cd and calculates the index of pollution of Cd and the proportion of polluted land to the research area. According to the theory of Chemical Time Bomb(CTB),it estimates the time when the soil will reach the critical point. With the current polluting speed,the rice land will lose its utilization of farming in 56 years and the dry land only in 18 years. Finally the paper provides a comprehensive way for the resolution of the pollution problem.