Distribution and Ecological Risk Assessmentof Heavy Metals in Sediments in ChineseCollapsed Lakes

作者：Yukui Li, Fei Liu, Xiujie Zhou, Xin Wang, Qingchuan Liu, Pengfei Zhu, Lichao Zhang, Chongyu Sun · 发表于：Polish Journal of Environmental Studies · 年份：2017 · DOI：10.15244/pjoes/64379 · 被引用次数：17 · 研究领域：Heavy metals in environment、Mine drainage and remediation techniques、Arsenic contamination and mitigation

Surficial sediments and water (27 samples each) were collected from three representative lakes collapsed by mining activities in Huaibei, China. Contents of heavy metals (Sb, As, Cd, Pb, Zn) in both water and sediments were detected via atomic absorption spectrophotometry and atomic fluorescence spectrometry, respectively. The variation coefficient (C.V.) of each heavy metal as well as the partition coefficient (Kd) between surficial sediments and water was calculated. The ecological risks of heavy metals in collapsed lakes were assessed via geoaccumulation index (Igeo), and we estimated the Pearson correlation coefficients between heavy metals. Together with the real situations around collapsed lakes, we resolved the sources of heavy metals. We found that the contents of heavy metals in water were basically below Surface Water Quality Standard I. The contents of heavy metals in the majority of sediment samples exceeded the background levels in the Yangtze River and Huai River areas, but were below the threshold effect concentration. The spatial distributions of heavy metals in surficial sediments were not uniform, as the C.V.s indicate medium variations. Analysis of Partition coefficient showed that Lieshan collapsed lake (LSH) was under severe risk. An analysis of Igeo revealed gentle-medium ecological risks from Sb, As, and Cd. The cl...