| Remediation and restoration of metal-contaminated sites： Concepts and appfications to mining areas |
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| 作者姓名： | Domy C. Adriano Hyo T. Chon Sally L. Brown Rosanna Ginocchio |
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| 作者单位： | [1]The University of Georgia, Savannah River Ecology Lab, Aiken, SC 29802 USA [2]School of Civil, Urban and Geosystem Engineering, Seoul National University, Seou1151-744, Korea [3]College of Forest Resources, University of Washington, Seattle, WA 98195 USA [4]Centro de Investigation Mineray Metalurgica, CIMM, Santiago, Chile |
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| 摘 要： | Metals, including heavy metals and metalloids, are a common group of environmental contaminants. Their sources in the environment are geogenic or anthropogenic. The growing trend in global industrialization ensures that more metals could be dispersed even in pristine ecosystems. To fuel industrialization, more metal ore mines have to be discovered and explored. These explorations often result in landscape disturbance, soil degradation and environmental contamination by unwanted mining constituents. Mine tailings brought up to the ground surface often serve as the main source of contaminants when these pyrite-rich materials oxidize. The oxidation of mine tailings results in proton generation, coupled with the dissolution of metals and other cations Unwanted anionic constituents are also produced. The so-called ＂acid mine drainage＂ may affect the productivity of farmlands and stability of receiving streams and other bodies of water-acidifying the waters and enriching the ecosystem with metals, i.e., high total dissolved solids. The acidified overburden materials become inhospitable to plant and microbial life as they are typically low in organic matter content and infertile. This exposes the landscape to runoff and erosion.
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| 关 键 词： | 生物地球化学 生物利用率 迁移率 矿区修复 |
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