School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, China.
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Ecotoxicol Environ Saf. 2021 Jan 15;208:111631. doi: 10.1016/j.ecoenv.2020.111631. Epub 2020 Nov 13.
This study was conducted to assess heavy metals in the overlying water and sediments of Luhun Reservoir, Henan Province, China, which is positioned downstream from a molybdenum (Mo) mining area. The pollution indexes indicated that deposition of all metals may have been affected by the mining area. The single element pollution factor (P) of Mo was the highest among all heavy metals, with a mean value of 2.05. However, the sediments were subject to long-term accumulation of metals, particularly Mo, Cd, Pb, and Zn, which originated from anthropogenic sources. The mean individual element potential ecological risk index values for Cd were above 385, while the mean value comprehensive potential ecological risk index was 465, which indicates a high ecological risk. Moreover, the enriched heavy metals had different spatial distributions in the Luhun Reservoir sediments. Finally, Pearson correlation analysis indicated that the Pb was mainly affected by different anthropogenic sources and had no relationship with other metals, which suggests that the influence of mining area on heavy metal concentrations in the reservoir is difficult to disentangle.
本研究旨在评估河南省陆浑水库表层水体和沉积物中的重金属含量，该水库位于钼矿区下游。污染指数表明，所有金属的沉积可能都受到了矿区的影响。在所有重金属中，钼的单元素污染因子（P）最高，平均值为 2.05。然而，这些沉积物长期积累了金属，特别是钼、镉、铅和锌，这些金属都来源于人为来源。镉的单个元素潜在生态风险指数的平均值都在 385 以上，而综合潜在生态风险指数的平均值为 465，这表明存在很高的生态风险。此外，陆浑水库沉积物中富集的重金属具有不同的空间分布。最后，皮尔逊相关分析表明，铅主要受到不同人为源的影响，与其他金属没有关系，这表明矿区对水库中重金属浓度的影响难以分辨。
