Because of the thin soil layer and the highly developed karst pipeline in karst landform,the pollu-tant level and the health risk assessment of soil in karst area,as a natural protective layer,is worth stud-ying.Taking 16 kinds of polycyclic aromatic hydrocarbons(PAHs)in the soil of Huixian wetland in Guilin as the research object,the content and composition characteristics of PAHs in soil of different land use types in Huixian wetland of Guilin in winter and summer were analyzed,their sources were analyzed,and the health risk assessment was carried out.The results show that the content of PAHs in the soil ranges from 8.57 ng/g to 1 407.21 ng/g,mainly in the fourth ring road,and the content of PAHs in the garden soil is the lowest.The principle component analysis-multiple linear regression(PCA-MLR)source analysis results show that the PAHs in the study area are mainly from vehicle emission sources.The correlation a-nalysis shows that human activities are the main influencing factor of the content of PAHs in the soil of the study area.Health risk assessment was carried out based on Monte Carlo simulation,and the results show that the potential carcinogenic risk of PAHs in soil is negligible.
关键词
土壤/多环芳烃(PAHs)/土地利用类型/来源解析/健康风险评价/桂林会仙湿地
Key words
soil/polycyclic aromatic hydrocarbons(PAHs)/land use type/source analysis/health risk assess-ment/Huixian wetland in Guilin
维普
万方数据