Evaluation of the Heavy Metal Pollution in Different Agricultural Soils of Shenzhen City
In order to analyze the content of agricultural surface soil and evaluate the hazard of heavy metals (Cu, Pb, Zn, Cd, Cr and Ni)in such field in Shenzhen, a survey was conducted. Twelve, twenty three, fifty, and two soil samples were collected from vegetable land, fruit land, wood land, and grass land, respectively. Pollution situation of the six heavy metals were evaluated using single contamination index method and Nemerow composite index. Results showed that serious heavy metal pollution was found in some soil samples. The pollution of Cd was most serious and Cu was slightest. There were different heavy metal pollution levels in different land-use types. The grass land was at good level, vegetable land and wood land were slightly polluted, and fruit land was moderately polluted. On the whole, the agricultural surface soils of Shenzhen were at slight pollution level.
NETL
NSTL
万方数据
维普
