[1]SUN Bianbian,ZHAO Yinxin,CHANG Dan,et al.Distribution Characteristics and Ecological Risk Assessment of Soil Heavy Metals in Green Spaces of Yinchuan City[J].Research of Soil and Water Conservation,2020,27(06):262-268,277.
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Distribution Characteristics and Ecological Risk Assessment of Soil Heavy Metals in Green Spaces of Yinchuan City
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 06
Page number:
262-268,277
Column:
目次
Public date:
2020-10-20
- Title:
- Distribution Characteristics and Ecological Risk Assessment of Soil Heavy Metals in Green Spaces of Yinchuan City
- CLC:
- X53
- DOI:
- -
- Abstract:
- In order to understand the spatial distribution characteristics and ecological risk of heavy metals in green space of Yinchuan City, the contents of Cr, Ni, Cu, Zn, As, Hg, Cd and Pb were determined. The pollution levels and potential ecological risks of soil heavy metals in different types of green space were evaluated by single factor, Nemero pollution index and Hakanson potential ecological risk index methods. The results show that except for Cr, the average contents of the other seven heavy metal elements exceeded the background values of Yinchuan City, and the Hg, Cd, Pb exceeded the standard seriously; heavy metals are mainly accumulated in road green space and production green space; the spatial distribution characteristics of heavy metal elements in green space are relatively consistent, and areas with the high values of heavy metal contents mainly concentrate in the central, eastern and northeastern parts, which are mainly affected by human activities such as industrial production, transportation, commerce, farming, and so on. Pollution evaluation shows that Hg is moderate pollution, other heavy metal elements are slight pollution or warning level, and all the green spaces belong to slight pollution grade. The comprehensive potential ecological risk indices of heavy metals in five types of green space decrease in the order: road green space>production green space>park green space>residential green space>protective green space, among which road green space, production green space and park green space are at moderate ecological risk, residential green space and protective green space are at slight ecological risk. The average of the individual potential ecological risk index(Eir)of each of the eight heavy metals decreases in the order: Hg>Cd>As>Pb>Cu>Ni>Cr>Zn, Hg has reached the strong ecological risk level. All in all, the green space soil in Yinchuan City is at moderate ecological risk, Hg is the main element of potential ecological risk, which should be paid attention to.
- References:
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Last Update:
2020-10-20