天津市区域土壤Cd污染及其对农产品影响

Investigation on Cd Pollution in Soil and Its Influence on Agricultural Products in Tianjin

研究了天津市土壤Cd元素区域分布特征,依据本次土壤调查背景参数特征和国家环境质量标准对农田土壤Cd污染进行了分级评价,天津市农田土壤存在不同级别的Cd污染。其中中-重度污染区面积约116km2,占调查面积的1.07%,主要集中在东丽区大毕庄、荒草坨,津南区双港,西青区邓店、楼家院等。在不同污染程度区农产品的调查结果表明,Cd在中-重度污染地区蔬菜中有富集和超标现象,应加强污染区土壤监测和治理工作。

The regional distributing characteristics of the Cd were explored in the soil in Tianjin. According to the background parameter characteristics in this soil survey and national environmental quality standards,the Cd pollution in the farmland was evaluated in several levels. And results showed that there is Cd pollution of different levels distributing in the farmland in Tianjin. Moreover, the pollution of medium and heavy degrees is mostly distributed in the Dabi Village and Huangcaotuo in Dongli District, Shuanggang in Jingnan District, and Loujiayuan and Zhengdian in Xiqing District, which totally covers an area of 116 km^2 and nearly 1.07 percent of the whole investigated area. The results of the investigation on the agricultural products in different regions with different pollution levels showed that the element of Cd has gathered in the vegetables in the polluted regions and exceeded the standard level. So the monitoring and the controlling of the soil should be intensified in the polluted region.