SURVEY AND CONTAMINATION ASSESSMENT OF HEAVY METALS IN SOIL AND PLANTS AROUND THE Pb/Zn MINE IN SHANGYU,ZHEJIANG PROVINCE
The concentrations of heavy metals（As,Pb,Zn and Cu） in soils and plants were investigated and assessed in different sampling sites around Pb/Zn mine tailing in Shangyu area of Zhejiang Province.The results showed that the concentrations of As,Zn,Pb and Cu in soils were 328 mg·kg-1,1760 mg·kg-1,2708 mg·kg-1 and 287 mg·kg-1,respectively.Based on National Soil Environmental Quality Standard of Grade Ⅲ,the comprehensive pollution indexes of contaminated paddy fields and woodland were both higher than 3,which showed the contamination soil reached heavy pollution grade.The index of normal paddy fields was 2.88,which showed moderate pollution.The concentrations of heavy metals in the roots of cultivated plants were higher than those in aboveground parts.Moreover,the heavy metal concentrations in cultivated plants were,abandoned paddy field contaminated paddy field normal paddy field,which followed the order in the soils.Among to the National Products Quality Standard（GB18406.1—2001）,the residual limits of As and Pb in vegetables are 0.5 mg·kg-1 and 0.2 mg·kg-1,but the concentrations of As and Pb in the edible part of radish were 5 and 220 times higher than the limits.Concentrations of As,Zn,Pb and Cu in the plants were 3.69 mg·kg-1,73.23 mg·kg-1,16.32 mg·kg-1 and 62.20 mg·kg-1,respectively.The pollution assessment results for rice grown on contaminated and normal paddy fields showed that the rice on the contaminated paddy field reached light pollution,and on normal paddy field reached alert status.Therefore,As,Pb,Zn and Cu pollution in the Pb/Zn mine tailing can not be ignored.
NETL
NSTL
万方数据
维普
