Effects of Mining Activities on the Release of Heavy Metals (HMs) in a Typical Mountain Headwater Region, the Qinghai-Tibet Plateau in China.
Effects of Mining Activities on the Release of Heavy Metals (HMs) in a Typical Mountain Headwater Region, the Qinghai-Tibet Plateau in China.
复制标题
青藏高原典型山地水源区采矿活动对重金属释放的影响
DOI：
10.3390/ijerph15091987
复制
发表时间：
2018-09-12
影响因子：
--
通讯作者：
Liu Y
中科院分区：
文献类型：
--
作者：
Wei W;Ma R;Sun Z;Zhou A;Bu J;Long X;Liu Y
了解高寒山区水源地重金属污染状况对维护流域生态系统稳定具有重要意义。在黑河干流及沿着支流共采集水样119个，沉积物样品104个。测定了水体和沉积物中8种重金属（As、Cd、Cr、Cu、Mn、Ni、Pb和Zn）的含量，以描述其空间变异性并评价水质。为了确定HMs的来源和途径，还测量了水样中的阴离子、阳离子和微量元素以及δD/δ 18 O稳定同位素。水质评估结果表明，支流受到当地采矿活动的影响。因子分析结果表明，沉积物中的重金属均来自母岩。自然风化作用和采矿作用都对HMs有贡献。Cr、Ni来源于玉石沟基性辉长岩和蛇纹石的风化作用。Mn似乎更多地受到农业和放牧等人为活动的影响。根据所涉及的采矿技术，在这一地区有两种释放有害物质的途径。对于露天采矿，采矿主要通过增强风化促进了HM的释放。对于地下采矿，由于风化作用较弱，高海拔地区的HMs可能导致更大的酸性矿山排放。随着海拔的降低，降水量增加，一系列复杂的水文因子对淋溶和径流影响显著。研究结果可用于提高水资源管理效率。
Understanding the heavy metal (HM) contamination in alpine mountain headwaters regions is important to maintaining the ecosystem stability of the basin. A total of 119 water samples and 104 sediment samples were collected along tributaries and the main course of Heihe River. The concentrations of eight heavy metals (As, Cd, Cr, Cu, Mn, Ni, Pb, and Zn) in water and sediment were measured to describe their spatial variability and to assess water quality. To identify the origins and pathways of HMs, anions, cations, and trace elements, as well as δD/δ18O stable isotopes in water samples were also measured. The results of water quality assessment suggested that tributaries were affected by local mining activity. Factor analysis in sediments showed that all HMs in sediments were inherited from the parent bedrock. Both natural weathering and mining contribute HMs. Cr and Ni were homologous with a source from the weathering of basic gabbro and serpentine at Yushigou. Mn appeared to be influenced more by artificial activities such as agriculture and grazing. Depending on the mining technique involved, two pathways for the release of HMs were distinguished in this area. For open-pit mining, mining promoted the release of HMs primarily via enhanced weathering. For underground mining, HMs might have contributed to greater acid mine discharge at high elevations due to the weak weathering processes. As the elevation decreases, precipitation increases, and a series of complex hydrological factor significantly affect leaching and runoff. The study results can be applied to improve water management efficiency.
登录
查看更多内容
影响因子：
5.8
作者：
Liu, Haiwei;Zhang, Yan;Xu, Jialai
通讯作者：
Xu, Jialai
黑河流域水文循环及其对内流域水资源管理的启示
影响因子：
4.4
作者：
Li, Xin;Cheng, Guodong;Cai, Ximing
通讯作者：
Cai, Ximing
影响因子：
9.8
作者：
Huang, Xiang;Sillanpaa, Mika;Vogt, Rolf D.
通讯作者：
Vogt, Rolf D.
DOI：
10.3390/ijerph13030247
发表时间：
2016-02-23
影响因子：
--
作者：
Bu J;Sun Z;Zhou A;Xu Y;Ma R;Wei W;Liu M
通讯作者：
Liu M
影响因子：
8.8
作者：
Kumar, Manoj;Ramanathan, A. L.;Bhattacharya, Prosun
通讯作者：
Bhattacharya, Prosun