基于不同参比值的土壤重金属潜在生态风险评价
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X825

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山东省地质矿产勘查开发局地质勘查与科技创新项目(KC201903;202005)


Potential Ecological Risk Assessment of Soil Heavy Metals Based on Different Reference Ratios
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    摘要:

    以土地质量调查评价工作为依托,对青州市南张楼村表层土壤重金属元素Cd、Hg、As、Cr、Ni、Cu、Zn、Pb累积特征进行分析,采用不同的参比值对土壤重金属进行潜在生态风险评价,并对8种重金属元素进行了相关性分析、聚类分析和因子分析。结果表明,研究区表层土壤重金属元素背景值均高于潍坊市土壤背景值,除Hg元素变异系数0.80属于强变异外,其他元素属于弱变异至中等变异,仅发现1个样本的Zn含量超标,其他样本重金属含量均低于农用地土壤污染风险筛选值。以风险筛选值为潜在生态风险评价参比值时,表现为重金属生态污染风险很低;以土壤背景值为潜在生态风险评价参比值时,表现为重金属在区域背景下存在不同程度的富集。相关性分析表明多组重金属元素存在显著相关性,聚类和因子分析将8种重金属元素分为三类,相关性强或在同一类中的重金属元素具有一定的同源性。

    Abstract:

    Based on the investigation and evaluation of land quality, the accumulation characteristics of Cd, Hg , As, Cr, Ni, Cu, Zn, Pb in surface soil of Nanzhanglou Village, Qingzhou City were analyzed. The potential ecological risk of soil heavy metals was evaluated with different reference ratios, and the correlation analysis, cluster analysis and factor analysis of eight heavy metals were carried out. The results show that the background values of heavy metal elements in the surface soil of the study area are higher than those in Weifang City. Except that the variation coefficient of Hg element is 0.80, which belong to strong variation, other elements belong to weak variation to medium variation. Only one sample of Zn content exceeded the standard, and other samples of heavy metal content are lower than the risk screening values for soil contamination of agricultural land. When the risk screening values are used as the reference ratio of potential ecological risk assessment, the risk of heavy metal ecological pollution is very low. When the soil background values are used as the reference value of potential ecological risk assessment, the heavy metals are enriched in different degrees in the regional background. Correlation analysis show that there is significant correlation between multiple groups of heavy metals. Eight heavy metals are divided into three categories by cluster and factor analysis. The heavy metals with strong correlation or in the same category have certain homology.

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姜冰,王松涛,孙增兵,等. 基于不同参比值的土壤重金属潜在生态风险评价[J]. 科学技术与工程, 2022, 22(7): 2964-2971.
Jiang Bing, Wang Songtao, Sun Zengbing, et al. Potential Ecological Risk Assessment of Soil Heavy Metals Based on Different Reference Ratios[J]. Science Technology and Engineering,2022,22(7):2964-2971.

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  • 收稿日期:2021-05-05
  • 最后修改日期:2021-11-25
  • 录用日期:2021-11-10
  • 在线发布日期: 2022-03-16
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