Mobility and natural attenuation of metals and arsenic in acidic waters of the drainage system of Timok River from Bor copper mines (Serbia) to Danube River
Mobility and natural attenuation of metals and arsenic in acidic waters of the drainage system of Timok River from Bor copper mines (Serbia) to Danube River
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从博尔铜矿（塞尔维亚）至多瑙河的蒂莫克河排水系统酸性水中金属和砷的迁移性和自然衰减
DOI：
10.1007/s11356-018-2541-x
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发表时间：
2018
影响因子：
5.8
通讯作者：
Stevanovic Zoran
中科院分区：
文献类型：
--
作者：
Dordievski Stefan;Ishiyama Daizo;Ogawa Yasumasa;Stevanovic Zoran
博尔河、克里韦利河和贝拉河属于跨界多瑙河的支流提木克河的流域。这些河流接收来自冶金设施的富含金属的酸性废水和来自博尔铜矿周围矿山废物的酸性矿山废水（AMD）。本研究的目的是确定2015年从博尔铜矿到多瑙河的河流中金属和砷的迁移率和自然衰减。结果表明，冶金设施对博尔河的影响最大，每年通过高酸性废水（pH = 2.6）排放约400 t的铜。河水和沉积物中Cu的最高测量浓度分别为40 mg L - 1和1.6%。石灰岩基岩中方解石的溶解和天然河水中高浓度的碳酸氢盐离子（约250 mg L−1）增强了酸性河水的中和作用以及随后金属和砷的化学沉淀。河流中Al、Fe、Cu、As和Pb浓度的降低主要是由于河床降水所致。另一方面，稀释对Mn、Ni、Zn和Cd浓度的降低起重要作用。化学沉淀物料和含富铁矿物（铁矾、磁铁矿和黄铁矿）的浮选尾矿在高流量时期被输送到多瑙河。该研究表明，石灰岩基岩集水区的自然衰减过程对降低含amd河水中金属和砷的浓度起重要作用。
Bor, Krivelj, and Bela Rivers belong to the watershed of Timok River, which is a tributary of transboundary Danube River. These rivers receive metal-rich acidic wastewater from metallurgical facilities and acid mine drainage (AMD) from mine wastes around Bor copper mines. The aim of this study was to determine the mobility and natural attenuation of metals and arsenic in rivers from Bor copper mines to Danube River during the year 2015. The results showed that metallurgical facilities had the largest impact on Bor River by discharging about 400 t of Cu per year through highly acidic wastewater (pH = 2.6). The highest measured concentrations of Cu in river water and sediments were 40 mg L−1and 1.6%, respectively. Dissolution of calcite from limestone bedrock and a high concentration of bicarbonate ions in natural river water (about 250 mg L−1) enhanced the neutralization of acidic river water and subsequent chemical precipitation of metals and arsenic. Decreases in the concentrations of Al, Fe, Cu, As, and Pb in river water were mainly due to precipitation on the river bed. On the other hand, dilution played an important role in the decreases in concentrations of Mn, Ni, Zn, and Cd. Chemically precipitated materials and flotation tailings containing Fe-rich minerals (fayalite, magnetite, and pyrite) were transported toward Danube River during the periods of high discharge. This study showed that processes of natural attenuation in catchments with limestone bedrock play an important role in reducing concentrations of metals and arsenic in AMD-bearing river water.