苍南沿浦湾滩涂重金属污染现状评价

发布时间：2018-02-12 05:05

本文关键词： 苍南沿浦湾土壤重金属检测现状评价　出处：《土壤通报》2016年01期 　论文类型：期刊论文

【摘要】：以温州苍南县沿浦湾滩涂土壤中的重金属含量为指标,采用环境污染指数、地累积指数和潜在生态危害指数综合评价重金属的含量水平及对生态环境的潜在影响。结果表明:沿浦湾滩涂土壤中重金属含量较低,均符合土壤环境质量二级标准。除了元素砷和汞,铜、铅、铬、锌、镉5种重金属的含量均为高潮带和中潮带高于低潮带。潜在生态危害系数和地累积指数的顺序均为砷(As)铜(Cu)铅(Pb)铬(Cr)锌(Zn)汞(Hg)镉(Cd);不同重金属的地累积指数的污染等级顺序为砷(As)铜(Cu)铅(Pb)=铬(Cr)=锌(Zn)=汞(Hg)=镉(Cd),砷(As)是主要生态风险因子;总的潜在生态风险指数为中潮带低潮带高潮带。综合三种评价方法,除砷在地累积指数评价中等级为无污染到中级污染,其余重金属现状评价结果均为轻微或低污染。
[Abstract]:Based on the heavy metal content in the soil of tidal flat in Cangnan County, Wenzhou, the environmental pollution index was adopted. The soil accumulation index and potential ecological hazard index comprehensively evaluated the content of heavy metals and their potential impact on the ecological environment. In addition to the elements arsenic and mercury, copper, lead, chromium, zinc, The order of potential ecological hazard coefficient and ground accumulation index are as follows: as) Cu) Pb) Pb) Cr (Cr) Zn) Zn) Hg) CD (Hg) CD ~ (2 +) CD ~ (2 +) CD ~ (2 +) ~ (2 +) CD ~ (2 +) ~ (2 +)) ~ (2 +) CD ~ (2 +) ~ (2 +) ~ (2 +) ~ (2 +) ~ (2 +)). The main ecological risk factors were Pb ~ (B _ (B) = Cr ~ (2 +) Cr ~ (2 +)) Zn ~ (+ +) Zn ~ (2 +) = Hg ~ (2 +) HG = CD ~ (2 +) CD ~ (2 +) ~ (2 +) ~ (2 +) ~ (2 +) ~ (2 +). The total potential ecological risk index is the high tide zone of the low tide zone in the middle tide zone. According to the three evaluation methods, the rank of the accumulation index of arsenic removal in the ground is no pollution to intermediate pollution, and the evaluation results of the status quo of the other heavy metals are slight or low pollution.
【作者单位】：浙江海洋学院;
【基金】：浙江省教育厅一般项目(Y201534409) 浙江海洋学院科研启动经费资助项目(21035012513) 浙江省水利河口研究院委托项目(21038002414)资助
【分类号】：X55

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