| Based on the statistical results of Cd in soil samples in Zhenjiang area,it showed that the quality ratio of Cd,in the city's 69 samples was in the range of 0.06 mg/kg to 1.37 mg/kg,mean 0.23 mg/kg.Compared with the background value,a certain degree of enrichment has appeared.And the quality ratio of Cd in samples was skewed distribution,and the ralative standard deviation was big.The single pollution index of Cd pollution degree evaluation showed that there was 83% of soil not polluted by Cd,14% for mild pollution,and 3% for moderately pollution in Zhenjiang area.Combined with the analysis of the industrial structure in Zhenjiang area,electroplating industry was a major source of Cd pollution in soil,road transport,pesticide and fertilizer to a certain extent,also increased the degree of contamination. |
