Spatial Distribution Characteristics and Potential Ecological Risk of Antimony and Selected Heavy Metals in Sediments of Duliujiang River

被引：0
|
作者：
Ning Z.-P. [1 ]
Xiao Q.-X. [1 ,2 ]
Lan X.-L. [1 ,2 ]
Liu Y.-Z. [1 ]
Xiao T.-F. [1 ,3 ]
Zhao Y.-L. [1 ,4 ]
Wu S.-L. [4 ]
机构：
[1] State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang
[2] University of Chinese Academy of Sciences, Beijing
[3] Innovation Center and Key Laboratory of Water Safety & Protection in the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou
[4] Pearl River Water Environment Monitoring Center, Guangzhou
来源：
Xiao, Tang-Fu (xiaotangfu@vip.gyig.ac.cn) | 1600年 / Science Press卷 / 38期
关键词：
Antimony (Sb); Ecological risk; Heavy metals; Sediment; Spatial distribution characteristics; The Duliujiang River;
D O I：
10.13227/j.hjkx.201701138
中图分类号：
学科分类号：
摘要：
In order to investigate the spatial distribution characteristics of Sb and selected heavy metals, and to discriminate their sources and potential ecological risks in surface sediments of the Duliujiang river, a total of 62 surface sediment samples were collected in this study. Total contents of Sb, As, Cd, Co, Cr, Cu, Mo, Ni, Pb, Tl, Zn and Fe in these samples were measured by inductively coupled plasma mass spectrometry (ICP-MS) and the inductive plasma optical emission spectrometry (ICP-OES). Principal component analysis (PCA) and Pearson correlation analysis were used to deduce the potential sources of these elements. Geo-accumulation index (Igeo), enrichment factor (EF) and Hakanson's potential ecological risk index (Eri and RI) were calculated to evaluate the pollution degree of heavy metals in sediments. The results indicated that the contents of heavy metals in sediments were impacted by human activities to different extents, and the Duliujiang River was significantly contaminated by Sb. The contents of Sb in sediments reached up to 7080 mg·kg-1, and gradually decreased from upstream to downstream, while the contents of As, Cd, Co, Cr, Cu, Mo, Ni, Pb, Tl and Zn varied indistinctively. The PCA results showed that the cumulative proportion of the first two components accounted for 77.67% of the total variables, suggesting that two major sources of Sb and other heavy metals were mining/smelting industry and natural sources. The calculated Igeo and EFs also showed that the surface sediments of the Duliujiang River were majorly polluted by Sb, followed by As and Co, lightly contaminated with Co, Cu, Mo, Ni, Pb and Tl, and uncontaminated with Cr. The ecological hazards (Eri) for each metals in a descending order were Sb>Cd>As>Co>Ni>Pb>Cu>Zn>Cr. The comprehensive index of potential ecological risks (RI) for heavy metals indicated that 58.1% of the 62 sediments samples had more than moderate ecological risks, and the sites with high RIs were generally located around Sb mining area and the downstream of the Baluo River. In addition, the Eri of Sb was a predominant component of RI, indicating that the Duliujiang River is an area with extremely high potential ecological risk of Sb. © 2017, Science Press. All right reserved.
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页码：2784 / 2792
页数：8
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