| Heavy metal and arsenic distributions in soils surrounding Palapye, Botswana： An evaluation of environmental impact of coal mining and combustion in a sub-arid region |
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| 作者姓名： | Mingzhe ZHAI Otlogetswe Totolo Motsoptse P. Modisi Robert B. Finkelman Mingzhe ZHAI |
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| 作者单位： | [1]Faculty of Sciences, University of Botswana, Private Bag 0022, Gaborone, Botswana [2]Department of Geology, University of Botswana, Private Bag 0022, Gaborone, Botswana [3]U.S. Geological Survey, 12201 Sunrise Valley Drive, MS 956, National Center, Reston VA 20192, USA |
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| 摘 要： | Coal is an important natural resource in Botswana. The best coals so far found occur in the Morupule coalfield, west of Palapye, where nearly 8000 million tons have been identified （Carney et al., 1994）. In this study we investigate the environmental impact of the mining and consumption of the high-ash, medium-calorific value bituminous coal in the eastern part of Botswana, which may serve as a reference for other coal mines and coal-based power stations around the globe. More than two hundred surface soil samples and three profile soil samples were collected around Morupule Colliery, Morupule Power Station and Palapye.
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| 关 键 词： | 煤 利用率 环境保护 重金属 水银 土壤 |
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