Pollution Level and Potential Ecological Risk of Heavy Metals in Surface Sediment of A Severe Polluted River in Nanjing

2018 3rd International Conference on Environmental Engineering and Sustainable Development

生态环境科学

Li, Y.^1^2 ; Xu, C.^2 ; Li, P.^3 ; Wang, Y.^2

Key Laboratory of Integrated Regulation and Resource Development On Shallow Lakes, Ministry of Education, Hohai University, Nanjing

210098, China^1

College of Environment, Hohai University, Nanjing

210098, China^2

Nanjing Water Planning and Designing Institute Co. Ltd, Nanjing

210006, China^3

关键词: Anthropogenic sources;    Contribution degree;    Disposal methods;    Nitrogen and phosphorus;    Pollution load indices;    Positive correlations;    Potential ecological risk;    Surface sediments;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/264/1/012007/pdf
DOI  :  10.1088/1755-1315/264/1/012007

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Black and smelly water bodies are generally caused by the enrichment and release of large amount of pollutants such as organic matter and heavy metals in sediments. Surface sediments at 11 sections of a severe polluted urban river in Nanjing were monitored to assess the pollution level and potential ecological risk. Results show that surface sediments were seriously polluted by heavy metals and contents of heavy metals were all higher than respective background values. Cd and Hg were major pollutants with relative high contents, following by Ni, As, and Zn. Comprehensive pollution load index of the river reached 4.1, indicating a "Progressive deteriorate" pollution level, with a contribution degree order of Cd>Hg>Pb>Zn>Cu>Ni>Cr>As. Most sections of the river exhibited high potential ecological risk with a contribution order of Cd>Hg>Pb>Cu>Ni>As>Zn>Cr. Additionally, there are significant positive correlations between Cu and organic matter (r = 0.947, p