徐州市大气细颗粒物中多环芳烃人群健康风险评估

Assessment on health risk of polycyclic aromatic hydrocarbons in airborne PM2.5 in Xuzhou City

目的调查徐州市大气颗粒物中的细颗粒物(PM2.5)中多环芳烃(PAHs)的污染水平并对人群进行健康风险评估。方法采用大气中流量采样器在徐州市泉山区采集PM2.5样品,用液相色谱法定量分析2016年徐州市PM2.5中16种PAHs的质量浓度,并对人群健康风险进行评估。结果 2016年徐州市大气PM2.5中PAHs月平均总质量浓度(∑16PAHs)范围为0.85~94.8 ng/m3,16种致癌性PAHs的等效致癌浓度(BEQ)范围为0.00011~6.81 ng/m3;儿童、成年男性、成年女性PAHs的致癌超额危险度年平均值分别为1.10×10-6、1.67×10-6、1.59×10-6。结论徐州市区大气PM2.5中多环芳烃污染较为严重,但致癌风险处于可接受水平。

Objective To investigate the level of pollution of polycyclic aromatic hydrocarbons(PAHs) in airborne PM2.5 in Xuzhou City, and to assess the health risk of urban population.MethodsThe mid-flow samplers were used tocollect PM2. 5 samples in the Quanshan District of Xuzhou City in 2016. The concentrations of sixteen PAHs were detected byHPLC and the health risk of the population was assessed.ResultsThe total concentration of PAHs in the PM2.5 was 0.85-94.8 ng/m3, and the benzo(a)pyrene equivalent concentration(BEQ) of 16 PAHs ranged from 0.00011 ng/m3 to 6.81 ng/m3.The carcinogenic risk of the children, male adults and female adults were 1.10×10-6, 1.67×10-6, and 1.59×10-6 respectively.ConclusionThe pollution of PAHs in airborne PM2.5 in the rural area of Xuzhou City is serious, though the carcinogenicrisk is at the acceptable level.