文献类型：期刊文献

英文题名：Spatial-Temporal Variations for Pollution Assessment of Heavy Metals in Hengshui Lake of China

作者：Liu, Weiwei[1,2] Guo, Ziliang[1,2] Wang, Henian[1,2] Wang, Daan[1,2] Zhang, Manyin[1,2]

第一作者：Liu, Weiwei;刘魏魏

通信作者：Guo, ZL[1];Zhang, MY[1];Guo, ZL[2];Zhang, MY[2]

机构：[1]Chinese Acad Forestry, Inst Wetland Res, Beijing Key Lab Wetland Ecol Funct & Restorat, Beijing 100091, Peoples R China;[2]Natl Ecosyst Res Stn Hengshui Wetland, Hengshui 053000, Peoples R China

年份：2022

卷号：14

期号：3

外文期刊名：WATER

收录：;EI(收录号：20220611612475);Scopus(收录号：2-s2.0-85124205607);WOS:【SCI-EXPANDED(收录号:WOS:000930518300001)】；

基金：Funding: This work was supported by the Fundamental Research Funds of Chinese Academy of Forestry (CAFYBB2019MA010), and the National Natural Science Foundation of China (72104236 and 31700409).

语种：英文

外文关键词：heavy metals; pollution characteristics; risk assessment; wetland sediment; spatial-temporal changes; high-pollution regions; management strategies

摘要：A comprehensive analysis of the spatial and temporal variations of heavy metals in wetland sediment can delineate the changes in possible contamination sources, providing valuable conservation strategies for further wetland management. Using the pollution index, enrichment factors, and potential ecological risk index, the spatial and temporal variations in heavy metals (Cd, Hg, As, Pb, Cr, Cu, and Zn) were evaluated in Hengshui Lake in north China in 2005 and 2020. The results demonstrated that the concentrations and assessment index for most heavy metals all decreased, with that of As decreasing the most (-54.3%), which mainly benefited from the implementation of a series of ecological conservation and restoration projects. Although the assessment indexes for most heavy metals indicated non-pollution status, Hg and Cd exhibited medium enrichment and moderate potential ecological risk. Especially for Cd, the related indexes increased by 860.0%, mainly influenced by anthropogenic activities. Furthermore, the high pollution was mainly distributed nearby the regions of dense enterprises and wastewater overflow zone (i.e., Wangkou sluice, the Jizhou Small Lake and its causeway). This was primarily attributed to the discharge of industrial wastewater and Cd-polluted ecological diversion water. These findings demonstrated the necessity of the continued and targeted implementation of wetland conservation and restoration projects and identified possible contamination sources and important pollution regions that could provide insights into contamination control options and targeted management strategies for Hengshui Lake.