PAHs Content,Source And Risk In Multi-media Environment Of Fenhe River Basin

In order to understand the pollution of organic matter in the Fenhe River and the ecological environment problems,in this study,the content,source and risk of 16 polycyclic aromatic hydrocarbons（PAHs）of sediments,soils,water,and PM₁₀ in the winter and summer of the Fenhe basin were studied using LC-MS,and based on this,the basis for the coordinated development of the economic environment in the region were provided.The results showed that the variation of the winter ∑PAHs content in the sediment was 74.83 to 58146.4 μg/kg,with an average of 5290.876 μg/kg.In summer,the variation of the content of the ∑PAHs was 89.14 to 24593.7 μg/kg,with an average of 2322.171 μg/kg.In the soil,the variation of the content of the PAHs in winter was 322.64 to 34472.6 μg/kg,with an average of 6862.540μg/kg;in summer,the content of the PAHs was 57.76 to 12965.6 μg/kg,with an average of 2684.291 μg/kg.In winter,the variation of the content of the PAHs in the water is 0 to 386.71 μg/kg,with an average of32.099 μg/L;in summer,the variation of the content of the PAHs is 0.03 to 25.912 ng/L,with an average of18.709 ng/L.In winter,the content of PAHs in PM₁₀ of atmospheric particulate matter was controlled at95.92 ng/m³ to 383.115 ng/m³,with an average of 161.32 ng/m³;the content of PAHs in summer is 79.23ng/m³ to 136.685 ng/m³,with an average of 96.75 ng/m³.Using the characteristic ratio method and the main component analysis method,the source of PAHs pollution is analyzed,and the results show that: the main source of PAHs in sediments is petroleum combustion;the main sources of PAHs in soil are biomass and coal combustion;the main sources of PAHs in water are petroleum and coal combustion;The main source of PAHs in PM₁₀ is incomplete combustion of petroleum.The results of the risk assessment of sediments and water ecology show that the 20 sample sediments and PAHs in the water concerned have some potential ecological risks and are harmful to the surrounding organisms.The health risk assessment of PAHs in the atmosphere and soil shows that most points of PAHs in both winter and summer lead to health hazards to the human body and are more harmful to children than adults.