Inhalation exposure of traffic police officers to polycyclic aromatic hydrocarbons (PAHs) during the winter in Beijing, China
Inhalation exposure of traffic police officers to polycyclic aromatic hydrocarbons (PAHs) during the winter in Beijing, China
复制标题
中国北京冬季交警吸入多环芳烃（PAH）的情况
DOI：
10.1016/j.scitotenv.2007.05.008
复制
发表时间：
2007-09-20
影响因子：
9.8
通讯作者：
Coveney, Raymond M.
中科院分区：
文献类型：
--
作者：
Liu, Yanan;Tao, Shu;Coveney, Raymond M.
本研究采用个体采样法对2005年冬季北京市交通警察暴露于多环芳烃（PAHs）的情况进行了评价。我们测量了收集的样品的气相和颗粒相多环芳烃在2004年夏天的早期研究使用相同的技术，并评估暴露风险的基础上计算的苯并（a）芘当量浓度（BaPeq）的夏季和冬季。冬季气态和颗粒相多环芳烃的平均暴露浓度分别为4300 2900 ng/m（3）和750 1000 ng/m（3），明显高于对照点同时测量的值，也明显高于夏季测量的值。警察和对照人群的多环芳烃暴露特征相似，气相中以萘为主，颗粒相中以荧蒽、芘、蒽和萘为主。夏季和冬季都有较大的日变化，这是由于天气条件的变化，特别是风速和相对湿度，这些变化往往会分散和消除空气中的多环芳烃。在冬季，交通警察的BaPeq平均值为82.1 ng/m3，显著高于对照组和环境空气的国家标准10 ng/m3。冬季颗粒相多环芳烃的暴露风险占总暴露风险的90%以上。每年，超过国家标准（10 ng/m3）的加权平均概率分别为69.3%和20.6%（c）2007年由Elsevier B. V.出版。
This study concerns the use of personal samplers to evaluate the exposure of traffic police to polycyclic aromatic hydrocarbons (PAHs) during the winter of 2005 in Beijing. We measured the samples collected for gas and particulate phases PAHs with the same technique used for an earlier study during the summer of 2004, and evaluated exposure risk based on the calculated benzo(a)pyrene equivalent concentrations (BaPeq) of both summer and winter. The mean exposure concentrations of gaseous and particulate phase PAHs in the winter are 4300 2900 ng/m(3) and 750 1000 ng/m(3), respectively, significantly higher than those measured simultaneously at control sites and also considerably higher than the values measured during the summer. The exposure PAH profiles for police and the control subjects are similar with predominant naphthalene in gaseous phase and dominant fluoranthene, pyrene, anthracene and naphthalene in particulate phase. Large daily variations occur both in summer and winter, because of the changes in the weather conditions especially wind speed and relative humidity which tend to disperse and scavenge PAHs in air. In the winter, the aver-age BaPeq value for traffic police is 82.1 ng/m(3), which is significantly higher than those for the control subjects and the national standard of 10 ng/m(3) for ambient air. Particulate phase PAHs contribute more than 90% of the total exposure risk in the winter. Annually, weighted-average probabilities of exceeding the national standard (10 ng/m(3)) are 69.3% and 20.6% for the police and the controls, respectively (c) 2007 Published by Elsevier B.V.