Gong Meng-Dan, Zhu Wei-Qin, Gu Yan-Qing, Li Shu-Ying, Jiana Ti, Tuni Ke
Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou 310036, China.
Huan Jing Ke Xue. 2016 Jun 8;37(6):2329-2337. doi: 10.13227/j.hjkx.2016.06.042.
With the purpose of investigation on heavy metal contamination in soils from vegetable bases of Hangzhou, adopting field investigation and indoor analysis methods, the contents of heavy metals as Cu, Zn, Pb, Cd, Cr, As and Ni, together with their relevance to the physicochemical properties of the 203 soils from 30 vegetable bases in 10 districts of Hangzhou were studied. The results showed that the contents of heavy metals such as Zn,Cr,As,Ni generally didn't exceed the standard, while the contents of heavy metals such as Cu, Pb, Cd exceeded it. The results from synthetic pollution evaluation showed that the soils were slightly polluted in soils from vegetable bases of Hangzhou, which were mainly caused by Cd pollution. Furthermore, there was slight potential ecological hazard for Cu, Zn, Pb, Cr, As and Ni but strong potential ecological hazard for Cd, and medium comprehensive ecological hazard as a whole for all the heavy metals in soils from vegetable bases of Hangzhou. The correlation analysis indicated that the contents of Cu, Zn, Pb, As, Cd were greatly influenced by the soil physicochemical property. Thus, measures must be taken for the prevention and controlling of heavy metal pollution in the soils from vegetable bases in Hangzhou, especially for that of Cd.
为调查杭州蔬菜基地土壤重金属污染状况，采用野外调查和室内分析方法，研究了杭州10个区30个蔬菜基地203份土壤中Cu、Zn、Pb、Cd、Cr、As和Ni等重金属含量及其与土壤理化性质的相关性。结果表明，Zn、Cr、As、Ni等重金属含量总体未超标，而Cu、Pb、Cd等重金属含量超标。综合污染评价结果显示，杭州蔬菜基地土壤存在轻度污染，主要由Cd污染所致。此外，杭州蔬菜基地土壤中Cu、Zn、Pb、Cr、As和Ni存在轻度潜在生态风险，Cd存在较强潜在生态风险，整体重金属综合生态风险为中等。相关性分析表明，Cu、Zn、Pb、As、Cd含量受土壤理化性质影响较大。因此，必须采取措施防控杭州蔬菜基地土壤重金属污染，尤其是Cd污染。
