Characteristics and Potential Ecological Risk of Heavy Metal in Vertical Soil Profiles of Typical Reclaimed Industrial Sites

Xu Zhihao; Wu Jian; Wang Min; Huang Yuchi; Yan Zhongchun; Wu Jianqiang; Huang Shenfa

doi:10.13961/j.cnki.stbctb.2019.02.007

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Characteristics and Potential Ecological Risk of Heavy Metal in Vertical Soil Profiles of Typical Reclaimed Industrial Sites

- Characteristics and Potential Ecological Risk of Heavy Metal in Vertical Soil Profiles of Typical Reclaimed Industrial Sites
- Bulletin of Soiland Water Conservation Vol. 39, Issue 2, Pages: 43-47(2019)
- 作者机构：
  
  1. 东华大学环境科学与工程学院,上海,201620
  2. 上海市环境科学研究院,上海,200233
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2019.02.007
  CLC： X53;X826
- Published：2019
- 稿件说明：
移动端阅览
Xu Zhihao, Wu Jian, Wang Min, et al. Characteristics and Potential Ecological Risk of Heavy Metal in Vertical Soil Profiles of Typical Reclaimed Industrial Sites[J]. Bulletin of Soiland Water Conservation, 2019, 39(2): 43-47.
DOI：

Xu Zhihao, Wu Jian, Wang Min, et al. Characteristics and Potential Ecological Risk of Heavy Metal in Vertical Soil Profiles of Typical Reclaimed Industrial Sites[J]. Bulletin of Soiland Water Conservation, 2019, 39(2): 43-47. DOI： 10.13961/j.cnki.stbctb.2019.02.007.

摘要

[目的]揭示典型复垦工业场地中重金属元素污染特征及潜在生态风险，为此类工业复垦场地管理和治理提供科学依据。[方法]分析上海市33块典型复垦工业场地表层、中层和深层土壤中8项重金属（砷、镉、铬、铜、镍、铅、锌、汞）的含量，采用内梅罗指数法和潜在生态风险指数法对复垦工业场地土壤重金属污染进行生态风险评价。[结果]①复垦工业场地土壤中重金属整体风险可控，17个点位重金属含量超过风险筛选值，其中以表层土壤中Cu和Zn污染最为突出，最大超标倍数分别为3.24，3.73倍。下层土壤中重金属平均含量均低于上海市土壤背景值，部分点位存在一定的重金属累积；②复垦工业场地表层、中层和深层土壤重金属内梅罗综合污染指数分别为1.21，0.78，0.73，分别处于轻度污染、尚清洁和尚清洁水平，其中表层Cd和Zn污染最为突出；③除表层土壤Hg（中度）和Cd（中度）外，其余重金属元素均存在轻微生态风险，表层土壤潜在生态风险指数（RI）为107.22，总体潜在生态风险接近中等水平，中层及深层土壤处于轻微潜在生态风险水平。[结论]复垦工业场地土壤重金属存在一定程度的累积性污染，其中Cu，Cd，Hg和Zn污染较为突出，考虑到毒性响应因素，则Hg和Cd更应引起关注。

Abstract

[Objective] The pollution characteristics and potential ecological risk of heavy matals in reclaimed industrial sites were investigated in order to provide scientific basis for the management and remediation of similar reclaimed industrial sites.[Methods] Eight heavy metals(As

Zn and Hg) were quantitatively analyzed in the surface

subsurface and deep soil of thirty-three typical reclaimed industrial sites in Shanghai City. The potential ecological risk and pollution degree of heavy metals in the sites were evaluated by using Nemerow index and potential ecological risk index.[Results] ① The risk of 8 heavy metals was acceptable overall. The contents of heavy metals in 17 points were higher than the screening value

while the pollution of Cu and Zn in surface soil was the most prominent. The average contents of 8 heavy metals in subsurface and deep soils were lower than the background value of Shanghai City

with certain accumulation of heavy metals in some points; ② The Nemerow index of heavy metals in vertical soil profile was 1.21

0.78 and 0.73 respectively

was in a light pollution or still clean level. Among which

Cd and Zn in surface soil were the most prominent; ③ The heavy metals in the reclaimed industrial sites were all at a slightly latent ecological risk level

except of Hg(medium) and Cd(medium) in surface soil. The potential ecological risk of surface soil was 107.22

which was close to a medium level

while the risks of subsurface and deep soil were mild.[Conclusion] The soil heavy metals in the sites were in an accumulative pollution to certain extent and the pollution of Cu

Hg and Zn were the most prominent. If the toxic response factors were concerned

Hg and Cd should be paid more attention.

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