上海城市中心区不同类型绿地土壤重金属污染特征

对上海城市中心城区公园绿地土壤和道路绿地土壤中Pb、Cu、Zn、Cr、Cd和Ni的污染特征进行了研究,发现除Cr和Ni外,土壤中重金属均出现富集现象,且公园绿地土壤中重金属含量普遍低于道路绿地土壤;土壤重金属污染潜在生态风险评价结果表明6种重金属中,Cd污染最严重,其潜在生态危害系数最高,总体上公园绿地土壤重金属污染潜...

Contamination Characteristics of Heavy Metals in Soils from Urban Green Space in Central Shanghai

Contamination characteristics of a set of heavy metals, including Pb, Cu, Zn, Cr, Cd and Ni, in the top soils collected from the two types of green space (urban park and roadside) in the central Shanghai were investigated. The results showed that heavy metals except for Cr and Ni were accumulated remarkably in the soils of urban green space, and the heavy metal concentrations were higher in soils of roadside green space than those in soils of urban park green space. The ecological risk assessment of soils heavy metals showed that the Cd pollution was the most serious among the 6 observed metals, and the potential ecological risk index (RI) of heavy metals in the soils of urban parks green space was generally at an intermediate level, while the RI in the soils of roadside green space was at a relatively high level. Multivariate statistical analysis showed that traffic emission and industrial activity were mainly responsible for the accumulation of heavy metals in the soils of urban green space, while heavy metals in the soils of roadside green space were mostly influenced by traffic activities.