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首页> 外文会议>AWRA specialty conference on ground water/surface water interactions >USE OF PASSIVE TREATMENT SYSTEMS TO MITIGATE THE IMPACT OF ACID-MINE GROUNDWATER DISCHARGES ON RECEIVING STREAMS
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USE OF PASSIVE TREATMENT SYSTEMS TO MITIGATE THE IMPACT OF ACID-MINE GROUNDWATER DISCHARGES ON RECEIVING STREAMS

机译：无源处理系统的使用来减轻酸地地下水排放对接收流的影响

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The project area comprises the 70 km~2 headwaters drainage basin of Slippery Rock Creek in Northwestern Pennsylvania. Slippery Rock Creek and its tributaries have been adversely impacted by acid mine drainage for over a 100 years and, at present, over 75 groundwater discharges from abandoned coal mines have been identified within the watershed and, of these, 59 are contributing acid load to receiving streams. The pH values of these streams range from 2.5 to 6.0, with acidity exceeding alkalinity and iron, manganese and aluminum concentrations varying from 2.0 to over 100 mg/L. To date, 15 passive treatment systems have been installed which are removing 30% of the acid loading and contribute 193 kg/day of alkalinity to Slippery Rock Creek and its tributaries. In addition, these systems are effective in removing over 27% of the iron and aluminum to receiving streams. The total cost of the 15 treatment systems is nearly $2.1 million, with an estimated additional $7.9 million being required to mitigate all acidic discharges within the project area.
机译：该项目区包括滑岩溪西北宾夕法尼亚70公里〜2个源头流域。滑岩溪及其支流已经由酸性矿山排水用于在百年不利影响，并且在目前，从废弃煤矿超过75地下水放电已经确定流域内和，这些的，59到接收贡献酸负荷流。这些流的pH值范围从2.5至6.0，酸度超过碱度和铁，锰和铝的浓度从2.0变化到超过100毫克/升。迄今为止，15个被动处理系统已经安装了哪些删除的酸负载量为30％，并有助于193公斤/碱度的天至滑岩溪及其支流。此外，这些系统可以有效地除去铁和铝的超过27％至接收流。 15个处理系统的总成本将近210万$，估计额外的$ 7.9万被要求减轻项目区域内的所有酸性排放。

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