State Key Laboratory on Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Beijing 100085, China.
J Hazard Mater. 2010 Apr 15;176(1-3):945-51. doi: 10.1016/j.jhazmat.2009.11.131. Epub 2009 Dec 3.
In this study, the source and risk associated with heavy metals in the estuarine sediments of Chaohu Lake Valley in East China were studied. The results demonstrated that most metal contents (Cd, Pb and Zn) increased continuously from 0.21, 8.05 and 73.76 mg/kg in the substrate to 0.33, 17.20 and 100.22 mg/kg in the surface sediments on average, respectively, in all ten estuaries evaluated. In addition, the high proportion of chemically reactive forms of Cd (18.10-33.60%) implied a moderately high risk, while the risk associated with Pb and Zn was moderate in most estuaries. Enrichment factor (EF) and cluster analysis (CA) were conducted to assess the metal sources. The EF values of Cd, Pb and Zn (4.96, 3.68 and 2.25, respectively) indicated that they had accumulated in the estuarine sediments. Additionally, CA suggested that their primary sources were anthropogenic, namely the extensive use of fertilizers. Therefore, heavy metal pollution due to agricultural intensification in Chaohu Lake Valley should be taken into account during the formation of valley management strategies for the water environment.
本研究探讨了中国东部巢湖水系河口沉积物中重金属的来源和风险。结果表明，在所评价的十个河口，平均而言，大多数金属含量（Cd、Pb 和 Zn）从基质中的 0.21、8.05 和 73.76mg/kg 分别连续增加到表层沉积物中的 0.33、17.20 和 100.22mg/kg。此外，Cd 的化学活性形态（18.10-33.60%）比例较高，表明存在中度高风险，而大多数河口的 Pb 和 Zn 风险处于中度水平。富集因子（EF）和聚类分析（CA）用于评估金属来源。Cd、Pb 和 Zn 的 EF 值（分别为 4.96、3.68 和 2.25）表明它们在河口沉积物中积累。此外，CA 表明它们的主要来源是人为的，即化肥的广泛使用。因此，在制定巢湖水系河谷水环境管理策略时，应考虑农业集约化导致的重金属污染。
