This study discusses an estimate of the risk associated with the intake of soil contaminated by lead, based on the nature of the source, through a detailed study of the parameters that can influence the bioaccessibility of the element from soil intake. Statistical variables that are related to the solubility and bioavailability of lead are used for this purpose. This includes considering the values of pH, electrical conductivity, particle size, mineralogical composition and the bioaccessibility/bioasimilability of lead. Obtaining an algorithm, represented by different probability distributions of the parameters considered, needs a thorough knowledge of the source materials, which may allow estimating/evaluating the intake health risk provided by the concentration of the metal present. The selected materials are from sites affected by mining activities in the Region of Murcia (SE of Spain) and soils in nearby areas, using a total of 186 samples. Soil samples, once screened and homogenized, were parameterized by determining pH, electrical conductivity, granulometry, both total and water-extractable Pb content. Oral bioaccessibility tests were also performed, and a detailed mineralogical analysis by X-ray diffraction was carried out.

本研究通过详细研究可能影响土壤摄入中元素的生物可及性的参数，根据来源的性质，讨论了与摄入被铅污染的土壤相关的风险估计。与铅的溶解度和生物利用度相关的统计变量用于此目的。这包括考虑 pH 值、电导率、颗粒大小、矿物成分和铅的生物可及性/生物同化性。获得由所考虑参数的不同概率分布表示的算法，需要对源材料有透彻的了解，这可能允许估计/评估由存在的金属浓度提供的摄入健康风险。所选材料来自穆尔西亚地区（西班牙东南部）受采矿活动影响的地点和附近地区的土壤，共使用 186 个样本。土壤样品经过筛选和均质化后，通过测定 pH 值、电导率、粒度、总铅含量和水可萃取铅含量来参数化。还进行了口服生物可及性测试，并通过 X 射线衍射进行了详细的矿物学分析。