Toxicology Area, Faculty of Veterinary Medicine, University of Extremadura, Avda de la Universidad s/n, 10003, Caceres, Spain.
INBIO G + C Research Institute, University of Extremadura, Avda de la Universidad s/n, 10003, Caceres, Spain.
Environ Sci Pollut Res Int. 2019 Oct;26(29):30386-30398. doi: 10.1007/s11356-019-06197-5. Epub 2019 Aug 22.
A study of the impact of an abandoned lead (Pb) mine ("Las Musas"), located in SW Spain, on the contamination of the surface soil and pastures in its vicinity revealed the presence of widely distributed, high levels of Pb contamination. The total Pb concentrations in soils sampled at distances from 3 to 998 m from the mine ranged between 129 and 1053 mg/kg, when it has been reported that non-polluted soils have concentrations of 29-40 mg/kg. These exceed the maximum tolerable levels in agricultural soils for the protection of environmental and human health as established in international and regional regulations. While the concentrations of potentially bioavailable Pb in the soils also surpassed the regulatory levels, the effective bioavailable fractions were low. The Pb concentrations measured in native plants ranged from 1.70 to 129 mg/kg dry weight, with Cynosurus echinatus, Philadelphus coronarius, and Fraxinus angustifolia being the species that bioaccumulated the greatest concentrations of this metal. Estimation of the environmental risk to wildlife and livestock grazing in the studied area showed no potential toxicity for these animals.
一项关于西班牙西南部废弃铅矿（“Las Musas”）对其附近地表土壤和牧场污染影响的研究表明，存在广泛分布的、高浓度的铅污染。从距矿山 3 至 998 米处采集的土壤中总铅浓度在 129 至 1053 毫克/千克之间，而据报道，无污染土壤的浓度为 29-40 毫克/千克。这些浓度超过了国际和地区法规为保护环境和人类健康而规定的农业土壤最大耐受水平。虽然土壤中潜在生物可利用的铅浓度也超过了监管水平，但有效生物可利用的部分较低。在本地植物中测量的铅浓度范围为 1.70 至 129 毫克/千克干重，其中硬毛矢车菊、冠状绣线菊和窄叶梣木是积累这种金属浓度最高的物种。对研究区域内野生动物和放牧家畜的环境风险评估表明，这些动物没有潜在毒性。
