Predicting the Benefits of Mine Water Treatment under Varying Hydrological Conditions using a Synoptic Mass Balance Approach
Predicting the Benefits of Mine Water Treatment under Varying Hydrological Conditions using a Synoptic Mass Balance Approach
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使用天气质量平衡方法预测不同水文条件下矿井水处理的效益
DOI：
10.1021/acs.est.8b06047
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发表时间：
2018
影响因子：
11.4
通讯作者：
Jarvis A
中科院分区：
文献类型：
--
作者：
Jarvis A
废弃矿山流域的地球化学和水文数据表明，（1）点污染源未能占总接收河道金属负荷在较高的流量和（2）河流流量和pH值之间存在反比关系，由于泥炭地径流。量化点和扩散污染源的不同重要性，使一个主要的点污染源在一个流域的处理效益的预测。由于地下水和地表径流污染源的扩散，在较高的流量，随河流流量（0.33至14公斤锌/天）的入流锌负荷增加。实验室测试表明，金属释放从河床，驱动pH值下降，在较高的流量，也有助于增加下游金属负荷。预测点源处理效益表明，在低流量下（锌从>800 μg Zn/L降至120 μg Zn/L），在较高的流量下，由于扩散源的影响较大，处理效益减少（Zn从240 μg Zn/L降至仅200 μg Zn/L）。定量了解点源和扩散源污染的重要性，以及金属衰减和释放的瞬时过程，对于评估处理对下游水质的好处至关重要。
Geochemical and hydrological data from abandoned mine watersheds demonstrated that (1) point sources of pollution fail to account for total receiving watercourse metal load at higher flows and (2) an inverse relationship exists between river flow and pH due to peatland runoff. Quantifying the varying importance of point and diffuse pollution sources enabled prediction of treatment benefits for a major point source of pollution in one watershed. Instream zinc load increases with river flow (∼3 to 14 kg Zn/d) due to diffuse groundwater and surface runoff pollution sources at higher flows. Lab tests demonstrated that metal release from the streambed, driven by pH decreases at higher flows, also contribute to increased downstream metal loads. Predicting point source treatment benefits demonstrates major instream improvements at low flow (zinc decreases from >800 to 120 μg Zn/L). At higher flows treatment benefits diminish (Zn decreases from 240 to only 200 μg Zn/L) due to the greater influence of diffuse sources. A quantitative understanding of the variable importance of point and diffuse sources of pollution, and instream processes of metal attenuation and release, is crucial to evaluating the benefits of treatment to downstream water quality.