Assessment and sources of heavy metals in the suspended particulate matter, sediments and water of a karst lake in Guizhou Province, China

被引：5
|
作者：
Li, Dianpeng [1 ]
Yang, Tangwu [1 ,2 ]
Zhou, Rixiu [1 ]
Zhu, Zhengjie [1 ,2 ]
An, Shuqing [1 ,2 ]
机构：
[1] Nanjing Univ, Sch Life Sci, Nanjing 210046, Jiangsu, Peoples R China
[2] Nanjing Univ Ecol Res Inst Changshu, Suzhou 215500, Jiangsu, Peoples R China
来源：
MARINE POLLUTION BULLETIN | 2023年 / 189卷
关键词：
Caohai; SPM; Sediment; Water; Heavy metal; Risk assessment; ECOLOGICAL RISK-ASSESSMENT; TRACE-ELEMENTS; SURFACE SEDIMENTS; RIVER; POLLUTION; CADMIUM; ESTUARY; CAOHAI; CONTAMINATION; EXPOSURE;
D O I：
10.1016/j.marpolbul.2023.114636
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
An integrated assessment of heavy metal (HM) contamination in dissolved matter, suspended particular matter (SPM) and sediments in lakes is essential. This study assessed the risks of HMs in the water, SPM and sediment of Caohai, China, and analyzed the changes in sediment HM contamination in conjunction with historical data. The HM transport was dominated by the SPM load, and the concentrations of Zn (179.07-1821.24 mg kg (1)), Pb (53.63-181.46 mg kg (1)), and Cd (3.68-21.31 mg kg(-1)) in SPM and sediment were 5.34-149.11 times higher than the upper continental crust (UCC) values. SPM and sediments were lightly to extremely polluted and had moderate to very high toxicity risks with Cd, Pb and Zn, and these three HMs originated from industrial and agricultural sources. The concentrations of Zn, Pb, and Cd in Caohai sediments increased by 36.7-187.9 % in 2022 compared to pre-2020. This research provides valuable reference data for the remediation of polluted karst lakes.
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页数：10
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