土壤重金属铬生态健康风险评价研究——以山西省某污灌区为例

Study on Ecological Health Risk Assessment of Soil Heavy Metal Chromium: A Case Study of a Sewage Irrigation Area in Shanxi Province

  • 摘要: 以山西省某污灌区为研究对象,结合压力-状态-响应模型,综合土壤重金属铬对环境的压力、迁移途径和生态环境的响应,提出了土壤重金属铬生态健康风险评价方法。通过与其他评价方法进行比较,发现本研究所构建的土壤重金属铬生态健康风险评价方法可将研究区生态健康风险情况划分为四级,而采用单因子评价法、地累积指数评价法的评价结果仅能将研究区划分为两级,采用潜在生态危害指数法评价结果研究区均属于轻微生态危害级。本研究所构建的土壤重金属铬生态健康风险评价方法对于铬污染土壤修复与风险管控有较高参考价值,便于后续的修复治理或风险管控措施的选择和应用。

     

    Abstract: Taking a sewage irrigation area in Shanxi Province as the research object, this study proposes an ecological health risk assessment method for soil heavy metal chromium(Cr). The method is constructed by integrating the environmental pressure, migration pathways, and ecological environmental response of Cr, based on the Pressure-State-Response(PSR) model. Comparisons with other assessment methods reveal that the method established in this study classifies the ecological health risks of the study area into four levels. In contrast, the single-factor evaluation method and the geo-accumulation index method only classify the area into two levels, while the potential ecological risk index method categorizes the entire area as a slight ecological hazard level. Consequently, the ecological health risk assessment method constructed in this study offers significant reference value for the remediation and risk control of Cr-contaminated soil, facilitating the selection and application of subsequent remediation or risk management measures.

     

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