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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Sediments as indicators of wetland efficacy in ameliorating acid mine drainage
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Sediments as indicators of wetland efficacy in ameliorating acid mine drainage

机译：沉积物作为改善酸矿排水中湿地疗效的指标

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摘要

As coal mining often results in the generation of acid mine drainage (AMD), careful planning and management of the water on such mines is required. A colliery in Mpumalanga recently sponsored independent research into the pollution-ameliorating potential of a natural wetland that has been receiving AMD for at least two decades. Samples of the sediment collected in the wetland were subjected to nine stages of sequential extraction in a determination of the distribution of the metal species present. The samples were then analysed for aluminium, iron, and manganese. The concentrations of sulphate-reducing bacteria (SRB) were also determined. The SRB concentration was found to increase with distance downstream (away from the source of pollution). An analysis of the sediment speciation data indicated that metal immobilization may be optimal in areas where the organic adsorption of metals is at its greatest. The analysis also provided evidence of the biogeo-chemical improvement of the water quality as the AMD passed through the wetland environment. The metal species present did not correlate strongly with the SRB populations; nor did the soluble species correlate with the species formed over long periods of time.
机译：由于煤矿经常导致酸性矿山排水（AMD）的产生，需要仔细规划和管理这些矿山的水。 MPUMALANGA的一家煤矿最近赞助了一项自然研究，进入了一家自然湿地的污染潜力，该湿地已经收到了至少二十年的AMD。在湿地中收集的沉积物的样品在确定存在的金属物种的分布中进行序列提取的九个阶段。然后分析样品用于铝，铁和锰。还测定了还原细菌（SRB）的浓度。发现SRB浓度随着下游的距离（远离污染来源）增加。沉积物形态数据的分析表明，金属固定化在金属的有机吸附在最大的区域中可能是最佳的。该分析还提供了在湿地环境通过湿地环境的水质改善水质的证据。存在的金属物种与SRB人群没有强烈相关;可溶性的物种也没有与长时间形成的物种相关。

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