Ecological risk of heavy metals in sediments of the Luan River source water |
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Authors: | Jingling Liu Yongli Li Bao Zhang Jinling Cao Zhiguo Cao Joseph Domagalski |
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Institution: | (1) State Key Joint Laboratory of Environmental Simulation and Pollution Control & School of Environment, Beijing Normal University, 100875 Beijing, China;(2) US Geological Survey, 6000 J Street, Placer Hall, Sacramento, CA 95819, USA |
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Abstract: | Distribution and characteristics of heavy metals enrichment in sediment were surveyed including the bio-available form analyzed
for assessment of the Luan River source water quality. The approaches of sediment quality guidelines (SQG), risk assessment
code and Hakanson potential ecological risk index were used for the ecological risk assessment. According to SQG, The results
show that in animal bodies, Hg at the sampling site of Wuliehexia was 1.39 mg/kg, Cr at Sandaohezi was 152.37 mg/kg and Cu
at Hanjiaying was 178.61 mg/kg exceeding the severe effect screening level. There were 90% of sampling sites of Cr and Pb
and 50% sites of Cu exceeded the lowest effect screening level. At Boluonuo and Wuliehexia, the exchangeable and carbonate
fractions for above 50% of sites were at high risk levels and that for above 30% of sites at Xiahenan and Wulieheshang were
also at high risk levels. Other sites were at medium risk level. Compared to soil background values of China, Hg and Cd showed
very strong ecological risk, and the seven heavy metals of Hg, Cd, Cu, As, Pb, Cr, Zn at ecological risk levels were in the
descending order. The results could give insight into risk assessment of environmental pollution and decision-making for water
source security. |
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Keywords: | Luan River Sediment Heavy metal Ecological risk assessment |
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