长春市周边公路沿线农田土壤多环芳烃污染特征及风险评价

Pollution Characteristics and Risk Assessment of Polycyclic Aromatic Hydrocarbons in Farmland Soils Along Highways Around Changchun City

以长春市周边主要公路沿线的农田土壤为研究对象,开展环境风险研究,通过分析农田土壤的多环芳烃(Polycyclic Aromatic Hydrocarbons,PAHs)含量和种类,对PAHs的分布特征和来源进行分析,以期为长春地区治理PAHs污染提供参考。结果表明,PAHs总含量范围为0.85~45.86 mg/kg,PAHs主要来源以生物质燃烧源为主,石油源与石油燃烧源同时存在。研究区农田土壤有50%的点位存在着一定程度的PAHs污染风险,需要引起关注。

The farmland soils along the main highways around Changchun City was taken as the research object,the environmental risk research was carried out.Through studying the content and types of polycyclic aromatic hydrocarbons(PAHs),the distribution characteristics and sources of PAHs were analyzed,in order to provide references for the treatment of PAHs pollution in Changchun area.The results showed that the total content of PAHs ranged from 0.85 mg/kg to 45.86 mg/kg,the main source of PAHs was biomass combustion source,while petroleum source and petroleum combustion source existed simultaneously.50%of the agricultural soils in the study area had a certain degree of PAHs contamination risk that required attention.