云南某特色产业园区周边土壤中多环芳烃的源分析与健康风险评价

Source Analysis and Risk Assessment of Polycyclic Aromatic Hydrocarbons(PAHs)in the Surrounding Soil of One Special Industrial Park of Yunnan

采集并分析了云南某特色产业园区煤磷化工企业内外土壤、积尘样品中16种PAHs的浓度。采用同分异构比值法进行来源分析,采用健康风险评价模型进行致癌风险评估。通过分析样品中PAHs的组分发现:土壤中各PAHs组分4环以上的占比较大,其中含量:5环>6环>4环;积尘中各PAHs组分3环、4环占比较大。通过同分异构比值法分析发现:云南某特色产业园区不同土壤监测点位的PAHs污染物浓度不同,但总体特征相似。土壤中PAHs主要来源于煤以及生物质的燃烧。通过健康风险评价方法对土壤中PAHs的致癌风险和非致癌风险分析表明:云南某特色产业园区土壤中PAHs不会对周边居民造成非致癌风险;土壤中PAHs均会对儿童造成致癌风险,部分采样点也会对成人造成一定的致癌风险。

The concentrations of 16 PAHs in soil and dust samples of coal and phosphorus chemical enterprises in a special industrial park of Yunnan were collected and analyzed.The isomeric ratio method was applied for source analysis and the health risk assessment model was adopted for cancer risk assessment.Through analyzing the components of PAHs in the samples,it was found that PAHs components with more than 4 rings in the soil accounted for the most,among which,the content of 5 ringsPAHs was more than that 6 rings and 4 rings.The 3-and 4-ring components of PAHs in dust accumulation accounted for a large proportion.Through isomerism ratio analysis,it was found that the concentrations of PAHs pollutants at different monitoring points in the industrial parks in Xudian County were different,but the overall characteristics were similar.The main sources of PAHs in soil are coal and biomass combustion.The analysis of the carcinogenic risk and non-carcinogenic risk of PAHs in the soil through the method of health risk assessment showed that PAHs in the soil of the industrial park will not cause non-carcinogenic risk to the surrounding residents.PAHs in soil may cause carcinogenic risk to children,and some sampling sites could also cause carcinogenic risk to adults.