2025年 03期

Risk Assessment and Source Apportionment of Heavy Pollution Metals in Riparian Soils of Dasi River in Jinan City


摘要(Abstract):

为了研究济南市大寺河沿岸土壤重金属污染特征及来源,在大寺河沿岸布置68个土壤采样点,分析As、 Cd、 Cr、 Cu、 Hg、 Ni、 Pb、 Zn元素含量,利用地累积指数、潜在生态风险指数和正定矩阵因子分析开展重金属元素污染程度评价和来源解析。结果表明,所选8种元素的含量都低于土壤环境质量标准中的农用地土壤污染风险筛选值,但As、 Cd、 Hg、 Zn元素含量均值相对济南土壤背景值较高,具有不同程度的富集趋势和变异性;地累积指数由高到低的元素顺序为Cd、 As、 Zn、 Hg、 Cr、 Cu、 Pb、 Ni,研究区土壤以Hg、 Cd元素污染为主,也存在不同程度的Cu、 Pb、 Zn元素污染;综合潜在生态风险指数为109.35,综合生态风险较低;自然源、自然-工业源、农业源、交通源和综合源为土壤重金属的主要来源,贡献率分别为29.1%、 22.5%、 10.1%、 22%和16.3%。目前大寺河沿岸土壤处于未受污染或轻度污染状态,环境质量良好。

关键词(KeyWords):重金属元素;污染特征;正定矩阵因子;源解析;大寺河

基金项目(Foundation):国家自然科学基金项目(42177385)

作者(Author): 杨正水,杨丽原,代杰瑞,王红晋,刘恩峰

DOI: 10.13349/j.cnki.jdxbn.20250320.001

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