福建沿海地区表层土壤铅来源及分布特征

在福建省沿海经济带生态地球化学调查的基础上,应用富集因子法对福建省沿海地区表层土壤中铅的来源进行了分析,并对其自然来源和人为来源的分布特征及影响因素做了初步探讨。结果表明,福建沿海地区约98.2%的土地面积表层土壤中铅属于自然来源,其余地区含有人为来源铅,且集中分布于个别市县城区;铅自然来源区呈现广域性分布特征,人为来源区则呈现零星的斑点状分布特点;铅自然来源区和人为来源区的空间分布特征在很大程度上受到土壤类型、森林植被分布以及人为活动等因素的影响。

Study on the Lead Sources with their Distribution in Topsoil within the Coastal Region of Fujian Province

Based on the results of the eco-geochemical survey of economic regions along the coast of Fujian Province,lead sources in topsoil within the coastal region of Fujian Province were studied with application of Enrichment Factor Method.Also the distribution of natural and anthropogenic sources of lead with their influencing factors was researched.Results showed that the area of topsoil with lead content completely attributed to natural source was 98.2 percent of the whole coastal region,in the others region,lead content in topsoil was influenced by anthropogenic source.Distribution of natural source was charactered by far-flung distribution within the coastal region,while the distribution of anthropogenic source presenting fragmentary patch pattern.The distribution characters of natural and anthropogenic source of lead,to a large extent,were dominated by soil types,forest vegetation,and human disturbance.