Pollution Assessment and Sources Identification of Heavy Metals in Surface Sediments from the Nantaizi Lake, Middle China

2017 International Conference on Advanced Environmental Engineering

生态环境科学

Ma, Jinlong^1 ; Li, Fei^1 ; Jia, Xiaolin^1 ; Zhang, Jingdong^1

Research Center for Environment and Health, Zhongnan University of Economics and Law, Wuhan

430073, China^1

关键词: Correlation analysis;    Environmental quality standards;    Heavy metal concentration;    Heavy metal elements;    Heavy metal pollution;    Microbial activities;    Potential ecological risk;    Sources identifications;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/111/1/012020/pdf
DOI  :  10.1088/1755-1315/111/1/012020

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The total contents of heavy metal elements including Cr, Cd, Cu, Zn, Pb and As were investigated in sediments from the Nantaizi Lake in Hanyang district of Wuhan. The heavy metal pollution level of Nantaizi Lake was calculated by potential ecological risk index and the main sources of pollutants were researched by correlation analysis and principal component analysis. The results show that heavy metal concentration of Nantaizi Lake sediments is within the Chinese Environmental Quality Standard for Soils (GB 15618-1995) level-II standard limitation. According to the result of potential ecological risk index, ecological hazard rank of heavy metal element of Nantaizi Lake sediments is: Cd>Cu>As>Pb>Zn>Cr, and whole water environment of lake is slightly polluted. Through correlation analysis and principal component analysis, it is found that industrial sewage and domestic wastewater in human activities are the main contributors to heavy metal sources of Nantaizi Lake, and chemical processes, such as endogenous microbial activities of lake etc., also affect heavy metal sources in sediments simultaneously.