海南岛砖红壤中Pb元素含量特征及环境质量评价

目的]对海南岛砖红壤中Pb元素含量特征进行研究并对其环境质量进行评价。方法]采用现场采样及室内分析测试的方法,在海南岛不同地貌单元各取3个土壤剖面,共27个土壤样本,对砖红壤土壤剖面中Pb元素的含量特征进行分析,研究不同地区砖红壤剖面该元素含量的空间分布特征,并利用地累积指数法对海南岛砖红壤中Pb元素进行了评价。结果]海南岛砖红壤中Pb元素含量总体较高;在水平空间分布上,海南岛东部砖红壤中Pb元素的总量平均值要比西部低;在垂直空间分布上,砖红壤中Pb元素的含量平均值在低山丘陵区最高,中部山地次之,周边台地平原最低;海南岛砖红壤Pb元素污染评价结果表明,海南岛砖红壤基本上没有受到Pb元素污染,只有中、南部砖红壤中Pb元素含量相对较高。结论]该研究结果为海南国家热带现代农业基地建设以及Pb污染防治提供了科学依据。

The Content of Pb Element and Environmental Quality Assessment in Latosol of Hainan Island

Objective] To research the content of Pb element in latosol of Hainan island and to assess its environmental quality.Method] Samples were selected for lab analysis.27 samples from different landforms of Hainan Island were selected(the same place was sampled for three times) to analyze the content of Pb in latosol of Hainan Island,study the spatial distribution feature of this element in latosol from different places and evaluate the content of Pb element in latosol of Hainan Island by geo-accumulation index.Result] The content of Pb generally stays at high level in latosol of Hainan Island;however,the mean content of Pb in east Hainan is lower than the mean value of west Hainan;vertically,the mean content of Pb shows descending order from hills,mountainous area to plain;the pollution assessment result showed that latosol of Hainan Island was hardly polluted by Pb element and only its content in the latosol from middle,south area stays at high level.Conclusion] The research provided scientific reference for constructing a national tropical modern agricultural base in Hainan as well as controlling Pb pollution.