仙山湖湿地土壤重金属空间分布特征与生态风险评价

发布时间：2018-03-29 04:13

本文选题：仙山湖　切入点：湿地　出处：《浙江林业科技》2016年06期

【摘要】：2014年4月,在浙江省长兴县仙山湖周边设置了15个采样点,共采集了45个土壤样品,分析Cu,Zn,Cr,Pb,Cd,As及Hg的含量水平及其分布特征,采用地累积指数、潜在生态危害指数法,对仙山湖土壤重金属污染进行评价。结果表明,在仙山湖周边各层土壤中,大部分所测元素含量低于国家土壤环境一级标准,部分样点Hg,Zn和Cd含量超标。在不同土地利用类型中,公路沿线的Cu及Cd含量较高;湖区下游土壤的Cu,Pb,Hg含量较高,Cd含量较低;湿地边滩、苗圃的土壤重金属含量变化不明显。在土壤垂直分布中,多数所测元素无明显变化规律。地累积指数表明,7种元素污染程度均属于无污染;潜在生态风险指数表明,部分样地的Hg潜在生态风险等级为中等及较强级别,应引起重视。
[Abstract]:In April 2014, 15 sampling sites were set up around Xianshan Lake, Changxing County, Zhejiang Province. A total of 45 soil samples were collected to analyze the contents and distribution characteristics of CuznznzhuCrPbCrPbCbCU and Hg in Changxing County, Zhejiang Province. The methods of ground accumulation index and potential ecological hazard index were used. The heavy metal pollution in the soil of Xianshan Lake was evaluated. The results showed that the contents of most of the elements measured in the soils around Xianshan Lake were lower than the first class national standard of soil environment. Among the different land use types, the content of Cu and CD along the highway is higher, the content of Cu, Pb, Hg in the soil of the lower reaches of the lake region is higher than that in the lower reaches of the lake region, the content of CD and Cu is higher than that in the lower reaches of the lake area, and the content of CD is lower in the wetland bank. In the vertical distribution of soil, most of the measured elements had no obvious change rule. The ground accumulation index showed that the pollution degree of seven elements was non-polluted, and the potential ecological risk index showed that the soil was not polluted, and the potential ecological risk index showed that there was no significant change in the soil heavy metal content in the nursery. The potential ecological risk of Hg in some plots is medium and strong, which should be paid more attention to.
【作者单位】：浙江省林业科学研究院;浙江省长兴县林业局;
【基金】：浙江省省属科研院所专项计划项目(2015F30001)资助
【分类号】：X53;X825

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