阿哈水库柱状沉积物中重金属分布特征及潜在生态危害风险评价
The Distribution Characteristic and Potential Ecological Hazard Risk Assessment of Heavy Metals in Vertical Sediments of Aha Reservoir
投稿时间:2017-12-13  修订日期:2018-07-24
中文关键词:柱状沉积物  重金属  分布特征  潜在生态危害风险  阿哈水库
英文关键词:vertical sediment  heavy metals  distribution characteristic  potential ecological risk  Aha reservoir
基金项目:贵州省教育厅青年科技人才成长项目(No.黔教合KY[2016]158);贵州省科学技术基金(No. 黔科合J字[2013]2145);贵州省科学技术基金(No. 黔科合基础[2016]1072)
作者单位E-mail
郭云 贵州民族大学 15473478@qq.com 
王铭 贵州民族大学 firefoxming@qq.com 
赵宇中 贵州民族大学 50394027@qq.com 
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中文摘要:
      阿哈水库是贵阳市重要的饮用水源地,及时掌握其沉积物中重金属的污染现状和存在的潜在生态风险具有非常重要的现实意义。本文对阿哈水库库区4个采样点的柱状沉积物中重金属铜(Cu)、锌(Zn)、镉(Cd)、铅(Pb)、铬(Cr)、镍(Ni)6种毒性重金属进行了检测分析。结果表明,6种重金属含量在空间分布上有显著差异。在水平方向上,库心沉积物中的Cu、Cr和Pb含量最高,南郊水厂取水口的Zn和Cd含量最高,金钟河和游鱼河入库口沉积物中的6种重金属含量都相对较低。垂直方向上,南郊水厂取水口和库中心这两个采样点中Cr、Pb、Cu、Ni、Zn、Cd6种重金属峰值均出现在10-15 cm处。Zn、Cu和Pb平均含量都超过背景值,Cd富集系数最高,污染最严重。同时,潜在生态风险评价结果显示,水库沉积物重金属潜在生态危害风险从大到小依次为Cd,Cu,Pb,Ni,Zn,Cr,Cd是生态风险贡献因子,阿哈水库沉积物重金属总体上还是存在轻微的生态危害风险及处于轻微的污染状态。
英文摘要:
      Aha reservoir is an important drinking water source in Guiyang city. It is particularly important to know the pollution status and the potential ecological risk of heavy metals in sediment. Heavy metals such as Cu,Zn,Cd,Pb,Cr and Ni in sediment of four sampling points in Aha Reservoir were detected and analyzed. The results showed that the content of six kinds of heavy metals was significantly different in spatial distribution. In the horizontal direction, the content of Cu, Cr and Pb in the reservoir center was the highest, and the content of Zn and Cd in the water intake was the highest, and the content of the six kinds of heavy metals in the other two sampling points was relatively low. In the vertical direction, the peak value of Cr, Pb, Cu, Ni, Zn and Cd were all in 10-15 cm in the reservoir center and the water intake. The average content of Cu, Zn and Pb was exceeded background value. The accumulation coefficient of Cd was the highest. The potential ecological risk in the descending order of Cd,Cu,Pb,Ni,Zn and Cr. And Cd was the ecological risk contributing factor. On the whole the ecological risk in sediment of Aha reservoir was slight and was in slight pollution astate .
郭云,王铭,赵宇中.2018.阿哈水库柱状沉积物中重金属分布特征及潜在生态危害风险评价[J].水生态学杂志,39(4):24-30.
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