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Risks associated with the mining of Pb-Zn minerals in some parts of the Southern Benue trough, Nigeria

机译：尼日利亚贝努厄南部海槽某些地区与铅锌矿开采有关的风险

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摘要

The environmental effects of the mining of lead-zinc mineralization in Enyigba area, Southern Be-nue trough were examined. The samples used for this study were obtained from abandoned mine sites, mine tailings, streams, hand-dug wells, mine pond and bore-hole. Collected samples were subjected to X-ray fluo-rescence, X-ray diffraction analyses, atomic absorption spectrometry and permeability tests. These were done using standard laboratory equipment and procedures. The concentrations of heavy metals present in analysed water samples fall below the world health organizations' (WHO) acceptable limits. Conversely, the soil, mine tailings and stream sediments indicate appreciable pol-lution level by some potential toxic metals (PTMs). Consequently, the habitual use of these soils for con-struction purpose by inhabitants has possible health hazards. The shaly lithology underlying the area is in-creasingly affected by weathering and lateritization, thus improving its permeability and the easiness with which PTMs can be conducted to the water table by leachate. Regular monitoring assessment is recommended to en-sure adherence of miners operating in the area to existing environmental laws.
机译：考察了南部Be-nue槽Enyigba地区铅锌矿化开采的环境影响。用于这项研究的样品是从废弃的矿场，尾矿，溪流，手工挖井，矿池和钻孔中获得的。对收集的样品进行X射线荧光分析，X射线衍射分析，原子吸收光谱法和渗透性测试。这些是使用标准实验室设备和程序完成的。分析的水样中存在的重金属浓度低于世界卫生组织（WHO）可接受的限值。相反，土壤，矿山尾矿和河流沉积物表明某些潜在的有毒金属（PTM）造成的污染水平相当大。因此，居民习惯将这些土壤用于建筑目的可能会危害健康。该地区下方的页岩岩性越来越受到风化和红土化的影响，因此提高了其渗透性和通过渗滤液将PTMs引入地下水位的难度。建议定期进行监测评估，以确保在该地区运营的矿工遵守现有的环境法律。

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  • 来源
    《Environmental Monitoring and Assessment》 |2014年第6期|3755-3765|共11页
  • 作者

    ogbonnaya Igwe; Ekundayo Joseph Adepehin; Chukwuemeka Iwuanyanwu; Chuku Okoro Una;

  • 作者单位

    Environmental and Engineering Geology Group, Department of Geology, University of Nigeria, Nsukka, Enugu State, Nigeria;

    Environmental and Engineering Geology Group, Department of Geology, University of Nigeria, Nsukka, Enugu State, Nigeria;

    Environmental and Engineering Geology Group, Department of Geology, University of Nigeria, Nsukka, Enugu State, Nigeria;

    Environmental and Engineering Geology Group, Department of Geology, University of Nigeria, Nsukka, Enugu State, Nigeria;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lower Benue trough; Pb-Znmineralization; Tailings; Leachate and PTMs;

    机译：下贝努谷;铅锌矿化;尾矿;渗滤液和PTM;

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