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[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侧试的方法,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。
[Objective] The research aimed to study the characteristics of Pb element content in brick red soils in Hainan Island and evaluate its environmental quality. [Method] With the methods of on-site sampling and laboratory analysis, three soil profiles were collected from different landform units in Hainan Island. A total of 27 soil samples were collected to analyze the Pb content in the soil profile of the latosol. Based on the spatial distribution characteristics of the element contents in the latosol profile, the Pb element in the latosol in Hainan Island was evaluated using the Cumulus index. [Result] The contents of Pb in the red soils of Hainan Island were generally high. In horizontal spatial distribution, the average content of Pb in the red soils of eastern Hainan Island was lower than that in the west. In the vertical spatial distribution, the contents of Pb The content of Pb in the red soil of Hainan Island is the highest in the hilly region, followed by the mountain in the middle, and the lowest in the plains of the surrounding terraces. The Pb elemental pollution evaluation of the red brick in Hainan Island shows that the red brick in Hainan Island is basically not contaminated by Pb, Pb element content is relatively high. [Conclusion] The results of this study provided a scientific basis for the construction of Hainan National Tropical Modern Agricultural Base and the prevention and control of Pb pollution.