Heavy Metal Pollution Characteristics and Potential Ecological Risk Assessment of Surface Soil in Dawen River Basin

4th International Conference on Energy Equipment Science and Engineering

Ding, Min^1^2 ; Zhang, Linlin^1 ; Zhang, Zhirui^1 ; Xu, Xu^1 ; Tang, Jianting^1 ; Fan, Ting^1 ; Zhao, Weijun^1

Tourism College, Taishan University, Tai'an

271000, China^1

College of Tourism and Environment, Shaanxi Normal University, Xi'an

710062, China^2

关键词: Background value;    Comprehensive index method;    Ecological hazards;    Heavy metal pollution;    Heavy metals in soil;    Potential ecological hazards;    Potential ecological risk;    Soil environment;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/242/5/052022/pdf
DOI  :  10.1088/1755-1315/242/5/052022

来源: IOP

【 摘 要 】

In this paper, 21 surface soil samples on both banks of Dawen River were selected for heavy metal testing and analysis. The average contents of heavy metals in soil samples in Dawen River Basin were as follows: Cr (72.3 mg/kg) > Pb (19.7 mg/kg) > As (8.80 mg/kg) > Cd (0.23 mg/kg) > Hg (0.05 mg/kg). Compared with the regional background value, the content of most heavy metals in the soil of the study area is higher. The single factor index method and Nimero comprehensive index method were used to evaluate the characteristics of heavy metal pollution in soil. The results show that the soil environment is in good condition. Potential ecological hazards of heavy metals in soil were calculated by Hakanson's potential ecological hazard index method. The results showed that 80.95% of the studied areas were slightly ecological hazards, 14.29% were moderately ecological hazards, and 4.76% were very strong ecological hazards.