Impacts of acid mine drainage on a stream in subtropical China during a major flood event |
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引用本文: | Chuxia LIN Yonggui WU Wenzhou LU Aisheng CHEN Yong LIU. Impacts of acid mine drainage on a stream in subtropical China during a major flood event[J]. 中国地球化学学报, 2006, 25(B08): 39-40 |
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作者姓名: | Chuxia LIN Yonggui WU Wenzhou LU Aisheng CHEN Yong LIU |
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作者单位: | [1]College of Resources and Environment, South China Agricultural University, Wushan, Guangzhou 510640, China [2]School of Environmental Science and Management, Southern Cross University, Lismore, NSW Australia |
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摘 要: | Field and laboratory work was carded out to investigate the chemistry and ecotoxicity of stream water affected by acid mine drainage in a tributary catchment of the Pearl River in subtropical China during a major flood event that corresponded to a return period of 100 years occurred in the study area. The results indicate that stream water was affected by acid mine drainage from the Dabaoshan Mine at least to a distance of 25 km downstream of the mine water discharge point. It appears that sulfide-H^+ from the waste rock dumps was readily available for discharging and the amount of H^+ being transported outwards depended on the volume of out-flowing waters. However, there was a lag time for the discharge of the metals. This may be attributed to the slower release of metals, relative to H^+, because it might take more time for the dissolution of heavy metal-bearing compounds. Fe, Zn and Al were the major metals of potential toxicity contained in the AMD-affected stream water, followed by Mn, Cu, Pb, As, Cd and Ni. Acute toxicity tests show that the AMD-affected stream water at 3.5 km downstream of the discharge point was highly toxic to the test organisms.
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关 键 词: | 矿山酸性排水 水化学 重金属 洪水灾害 |
Impacts of acid mine drainage on a stream in subtropical China during a major flood event |
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Abstract: | |
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Keywords: | acid mine drainage water chemistry ecotoxicity heavy metal Daphnia carinata |
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