太原市冬季大气颗粒物中多环芳烃分布特征及健康风险评价研究

Distribution Characteristics and Health Risk Assessment of Polycyclic Aromatic Hydrocarbons in Atmospheric Particulates in Taiyuan in Winter

根据2019年12月和2020年1月在太原市两个站点(五一广场和晋祠公园)采集的大气颗粒物样本,讨论了大气颗粒物中多环芳烃(PAHs)的浓度水平,环数特征和健康风险。结果表明在采样期内五一广场和晋祠公园的PAHs平均浓度分别为(57.57±11.44)ng/m3和(53.31±21.55)ng/m3;不同环数PAHs贡献顺序均为4环>5~6环>3环,2环均未检测到。苯并[a]芘(BaP)毒性当量浓度表明,五一广场和晋祠公园大气颗粒物中的Bap 24 h平均质量浓度分别超标了25.2%和12.8%;致癌风险评估表明,两个站点健康风险均高于可接受水平(10-6),且成人呼吸暴露风险高于儿童。

The concentration level,ring number characteristics and health risks of polycyclic aromatic hydrocarbons(PAHs)in the atmospheric particulates was discussed based on samples of atmospheric particulates in two stations(Wuyi Square and Jinci Park)collected in December 2019 and January 2020 in Taiyuan City.The results showed that the average concentration of PAHs during the sampling period was(57.57±11.44)ng/m3 in Wuyi Square station and(53.31±21.55)ng/m3 in Jinci Park station,respectively.The contribution order of PAHs with different ring number was 4 rings>5~6 rings>3 rings,and 2 rings were not detected.The average 24-hour mass concentration of Bap in atmospheric particles exceeded the standard by 25.2%in Wuyi Square and 12.8%in JinciPark.The results of carcinogenic risk assessment showed that the health risk levels of the two stations were higher than the acceptable level(10-6),and the respiratory risk of adult was higher than that of children.