摘要
为探究保定市PM2.5中多环芳烃(PAHs)的污染特征及其健康风险,于2017年1月和7月采集了保定市城区5个地点的PM2.5样品,利用气质联用仪测定了16种优控PAHs的质量浓度。结果表明,保定市夏季和冬季PAHs平均质量浓度分别为(7.16±2.23)ng/m^3和(629.73±338.53)ng/m^3。特征比值分析表明,机动车燃油排放、生物质和煤燃烧排放是保定市环境空气PM2.5载带PAHs的主要来源。终生致癌风险(ILCR)评估结果表明,成人夏季和冬季ILCR分别为4.59×10^-6和6.47×10^-4,提示具有较高的健康风险,需要采取措施进行防控。
The present paper is aimed at analyzing the potential sources of PAHs by the method of diagnostic ratio and the health risk evaluation by using the Monte Carlo model.As is well known,the polycyclic aromatic hydrocarbons(PAHs)associated with the fine particles(PM2.5)are harmful to human health.In order to get to understand the pollution features and the health risks of PM2.5-bound PAHs in Baoding city,we have collected PM2.5 samples on the 90 mm quartz fiber by using the mediumflow air samplers operating at a flow rate of 100 L/min during summer(July 8-18)and winter(January 12-20)in 2017.The above said 5 sites are typical for the different functional areas of the city at the 16 priority PAHs designated to examine by the environmental protection with the GC-MS.The results of our investigation prove that the ranges of the total PAHs concentrations stand in the range of 3.85-14.18 ng/m^3 with the average rate of(7.16±2.23)ng/m^3 in summer and 168.50-1571.84 ng/m^3 with the average of(629.73±338.53)ng/m^3 in winter.The average concentration rate of Ba P(which can usually be taken as an indicator of carcinogenic PAHs)prove to be 42.48 ng/m^3 in winter(exceeding the annual average limit rate stipulated by the national ambient air quality standards,known as 1 ng/m^3).Moreover,the PAH profiles can be approached by the results from the different distributions of the individual PAHs in different seasons.For example,naphthalene,benzo(b)fluoranthene and phenanthrene are thick with most abundant PAHs rate in summer but with fluoranthene,pyrene and benzo(b)fluoranthene rates in winter.The diagnostic ratios analysis indicate that,the vehicle exhaust,coal combustion and biomass burning serve as the major contributors to the PM2.5-bound PAHs in ambient air of Baoding.According to the risk assessment results,the inhalation incremental lifelong cancer risk(ILCR)sufferers for adults are 4.59×10^-6 in summer and 6.47×10^-4 in winter,especially,for the high potential cancer risk.The sensitivity analysis results indicate that furthe
作者
韩金保
肖亚楠
刘晨飞
韩坤
HAN Jin-bao;XIAO Ya-nan;LIU Chen-fei;HAN Kun(School of Quality&Technical Supervision,Hebei University,Baoding 071002,Hebei,China;National&Local Joint Engineering Research center of Metrology Instrument and System,Hebei University,Baoding 071002,Hebei,China;Non-destructive Testing L aboratory,Hebei University,Baoling 071002,Hebei,China)
出处
《安全与环境学报》
CAS
CSCD
北大核心
2020年第4期1459-1466,共8页
Journal of Safety and Environment
基金
河北省高等学校科学技术研究项目(QN2016024)
国家自然科学基金项目(41701579)
河北大学高层次创新人才科研启动经费项目(1081/801260201072)。
