Hu Yandi, Bai Zhipeng, Zhang Liwen, Wang Xue, Zhang Li, Yu Qingchan, Zhu Tan
College of Environmental Science and Engineering, Nankai University, State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, 300071, Tianjin, China.
Sci Total Environ. 2007 Sep 1;382(2-3):240-50. doi: 10.1016/j.scitotenv.2007.04.038. Epub 2007 Jun 4.
In China, traffic policemen have to stand for several hours a day at the road intersections with high vehicle flows. To assess their exposure to airborne carcinogenic polycyclic aromatic hydrocarbons (PAHs) during their working time, a preliminary study was conducted to measure the personal exposure level to PAHs. And a probabilistic incremental lifetime cancer risk (ILCR) model together with the benzo[a]pyrene (BaP) toxic equivalents (BaP(eq)) method was used to conduct health risk assessment. Personal exposure monitors (PEM) were carried by traffic policemen to collect PM10 samples during their daily work in Tianjin, China. Meanwhile, PM100 samples were collected at the roadsides and on campus of Nankai University as comparison. PAHs species were quantitatively analyzed by GC/MS. Experimental results showed that the concentrations of total PAHs, BaP and BaP(eq) were much higher at the road intersections (867.5, 26.2, 82.4 ng m(-3)), where the traffic policemen stand during their work time, than those at the roadsides (46.6, 1.5, 5.7 ng m(-3)), and on campus (19.5, 0.7, 2.4 ng m(-3)). According to the risk assessment results, the occupational risk falls within the range from 10(-6) to 10(-3). On the basis of sensitivity analysis results, further research should be directed to give better characterization of the yearly concentration distribution of PAHs and the cancer slope factor (CSF) of BaP in order to improve the accuracy of the health risk assessment.
在中国，交通警察每天必须在车辆流量大的道路交叉口站立数小时。为了评估他们在工作期间暴露于空气中致癌多环芳烃（PAHs）的情况，进行了一项初步研究以测量PAHs的个人暴露水平。并使用概率性终身癌症风险（ILCR）模型和苯并[a]芘（BaP）毒性当量（BaP(eq)）方法进行健康风险评估。在中国天津，交通警察佩戴个人暴露监测器（PEM）在日常工作中采集PM10样本。同时，在路边和南开大学的校园采集PM100样本作为对照。通过气相色谱/质谱联用仪对PAHs种类进行定量分析。实验结果表明，交通警察工作时所站立的道路交叉口处的总PAHs、BaP和BaP(eq)浓度（分别为867.5、26.2、82.4 ng m(-3)）远高于路边（分别为46.6、1.5、5.7 ng m(-3)）和校园（分别为19.5、0.7、2.4 ng m(-3)）。根据风险评估结果，职业风险在10(-6)至10(-3)范围内。基于敏感性分析结果，应进一步开展研究以更好地表征PAHs的年浓度分布和BaP的癌症斜率因子（CSF），从而提高健康风险评估的准确性。
