期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：242
期号：5
页码：1-8
DOI：10.1088/1755-1315/242/5/052022
出版社：IOP Publishing
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.
