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为了解宁夏农村土壤重金属镉、铅含量,于2012年选取5个地级市的5个县(区)25个乡的200个行政村作为调查点,采集200份土壤样品进行镉、铅含量分析。结果显示,农村土壤镉、铅含量平均值分别为0.187和20.76 mg/kg。镉含量超标率为3%,且高于宁夏地区背景值(0.112 mg/kg),铅含量均达标且与宁夏地区背景值(20.6 mg/kg)基本一致,提示本次调查的宁夏农村土壤存在镉污染,来源有待进一步研究。
In order to understand the content of heavy metal cadmium and lead in rural soil of Ningxia, 200 administrative villages in 25 townships of 5 prefecture-level cities in 5 prefecture-level cities were selected as survey sites in 2012, and 200 soil samples were collected for cadmium and lead content analysis . The results showed that the average contents of cadmium and lead in rural soil were 0.187 and 20.76 mg / kg, respectively. The exceeding standard rate of cadmium content was 3% and higher than the background value of 0.112 mg / kg in Ningxia. The lead content reached the standard and was basically the same as that of Ningxia (20.6 mg / kg) Cadmium pollution, the source needs further study.