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Lateral distribution of potential toxic elements from lead–zinc mine sites within Enyigba, Southeastern Nigeria
Environmental Earth Sciences ( IF 2.8 ) Pub Date : 2020-08-04 , DOI: 10.1007/s12665-020-09122-z
Benedicta Ozobialu , Ogbonnaya Igwe , Chukwuebuka Emeh

Artisanal mining activities in Enyigba community and its environs have become a major environmental problem, which exposes the water, soil, and vegetation within the environment to potential toxic elements (PTEs). However, the lateral extent that the PTEs have spread within the environment has not been ascertained. It is important to determine the lateral extent of the PTEs within the environment to establish safe zones for drinking water usage and for crop cultivation. For this reason, about nine samples each for soil, sediment, vegetation, surface and groundwater were collected within and beyond the mine sites catchment area. The physicochemical properties of these samples were determined following standard procedures, whereas the concentration of PTEs such as cadmium, arsenic, zinc, and lead in them were determined using atomic absorption spectroscopy method. Statistical analysis, biogeochemical analysis, and geospatial information system (GIS) analytical tools were employed to interpret the field and laboratory results. The results revealed that proximity to mine site contributed significantly to the concentration level of PTEs within the environment. The concentration level of the PTEs was higher in water, soil, sediment, and vegetation samples that were collected close to the mine sites, which gradually reduces farther away from the potential pollutant source points. The environmental mobility index and soil–plant bioconcentration factor revealed that cadmium, arsenic, and zinc are more mobile and bioavailable than lead, thus their toxicity within the study area environment are more likely than that of lead.

中文翻译:

尼日利亚东南部恩尼格巴铅锌矿场的潜在有毒元素的横向分布

Enyigba社区及其周围地区的手工采矿活动已成为一个主要的环境问题,使环境中的水,土壤和植被暴露于潜在的有毒元素(PTE)。然而,尚未确定PTE在环境中扩散的横向范围。确定环境中PTE的横向范围对于建立饮用水和作物种植的安全区域非常重要。因此,在矿区集水区内外都采集了大约九个土壤,沉积物,植被,地表水和地下水的样品。这些样品的理化特性是按照标准程序确定的,而PTE的浓度(例如镉,砷,锌,原子吸收光谱法测定其中的铅。使用统计分析,生物地球化学分析和地理空间信息系统(GIS)分析工具来解释现场和实验室结果。结果表明,靠近矿山地点对环境中PTE的浓度水平有显着影响。在靠近矿区的水,土壤,沉积物和植被样品中,PTE的浓度较高,逐渐远离潜在的污染源点逐渐降低。环境流动性指数和土壤植物生物富集系数表明,镉,砷和锌比铅更具迁移性和生物利用度,因此它们在研究区环境中的毒性比铅高。使用统计分析,生物地球化学分析和地理空间信息系统(GIS)分析工具来解释现场和实验室结果。结果表明,靠近矿山地点对环境中PTE的浓度水平有显着影响。在靠近矿区的水,土壤,沉积物和植被样品中,PTE的浓度较高,逐渐远离潜在的污染源点逐渐降低。环境迁移率指数和土壤-植物生物富集因子表明,镉,砷和锌比铅更具迁移性和生物利用度,因此在研究区环境中,镉,砷和锌的毒性比铅高。使用统计分析,生物地球化学分析和地理空间信息系统(GIS)分析工具来解释现场和实验室结果。结果表明,靠近矿山地点对环境中PTE的浓度水平有显着影响。在靠近矿区的水,土壤,沉积物和植被样品中,PTE的浓度较高,逐渐远离潜在的污染源点逐渐降低。环境迁移率指数和土壤-植物生物富集因子表明,镉,砷和锌比铅更具迁移性和生物利用度,因此在研究区环境中,镉,砷和锌的毒性比铅高。使用地理空间信息系统(GIS)分析工具来解释现场和实验室结果。结果表明,靠近矿山地点对环境中PTE的浓度水平有显着影响。在靠近矿区的水,土壤,沉积物和植被样品中,PTE的浓度较高,逐渐远离潜在的污染源点逐渐降低。环境迁移率指数和土壤-植物生物富集因子表明,镉,砷和锌比铅更具迁移性和生物利用度,因此在研究区环境中,镉,砷和锌的毒性比铅高。使用地理空间信息系统(GIS)分析工具来解释现场和实验室结果。结果表明,靠近矿山地点对环境中PTE的浓度水平有显着影响。在靠近矿区的水,土壤,沉积物和植被样品中,PTE的浓度较高,逐渐远离潜在的污染源点逐渐降低。环境迁移率指数和土壤-植物生物富集因子表明,镉,砷和锌比铅更具迁移性和生物利用度,因此在研究区环境中,镉,砷和锌的毒性比铅高。结果表明,靠近矿山地点对环境中PTE的浓度水平有显着影响。在靠近矿区的水,土壤,沉积物和植被样品中,PTE的浓度较高,逐渐远离潜在的污染源点逐渐降低。环境迁移率指数和土壤-植物生物富集因子表明,镉,砷和锌比铅更具迁移性和生物利用度,因此在研究区环境中,镉,砷和锌的毒性比铅高。结果表明,靠近矿山地点对环境中PTE的浓度水平有显着影响。在靠近矿区的水,土壤,沉积物和植被样品中,PTE的浓度较高,逐渐远离潜在的污染源点逐渐降低。环境迁移率指数和土壤-植物生物富集因子表明,镉,砷和锌比铅更具迁移性和生物利用度,因此在研究区环境中,镉,砷和锌的毒性比铅高。逐渐减少远离潜在污染物源点的距离。环境迁移率指数和土壤-植物生物富集因子表明,镉,砷和锌比铅更具迁移性和生物利用度,因此在研究区环境中,镉,砷和锌的毒性比铅高。逐渐减少远离潜在污染物源点的距离。环境迁移率指数和土壤-植物生物富集因子表明,镉,砷和锌比铅更具迁移性和生物利用度,因此在研究区环境中,镉,砷和锌的毒性比铅高。
更新日期:2020-08-04
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