【摘要】 目的了解宣威市室内及室外空气中多环芳烃污染状况并研究当地居民的健康风险状况。方法于2009年2月选择宣威市热水镇及来宾镇90户村民进行室内和室外空气样本采样,检测苯并(a)芘(B[a]P)浓度,并应用美国环保局(EPA)健康风险评价模型,对空气中B[a]P致当地人群的健康风险进行研究。结果来宾镇和热水镇室内空气中B[a]P浓度严重超标,超标倍数分别为132倍和64倍;来宾镇室外空气中B[a]P浓度超标3.7倍,热水镇没有超标;同1979年调查结果相比,两镇室内污染水平有所降低,但室外污染程度有所增加。当地成人和儿童的人群终身致癌超额危险度分别为7.074×10-5和4.877×10-5,同1979年调查的污染水平相比,均降低一个数量级,但仍高于可接受水平(10-6),且成人的致癌风险是儿童的1～2倍。结论宣威市室内空气多环芳烃污染严重,人群终身致癌超额危险度高于可接受水平。更多还原

【Abstract】 Objective To investigate the indoor and outdoor air pollution of PAHs in the Xuanwei, Yunnan province and assess the health risk. Methods Indoor and outdoor air samples were collected and tested, and was used to assess air benzo (a)pyrene-induced health risks to local population by the application of EPA health risk assessment model. Results The results showed that the level of pollution compared with the past level declined, but the concentration of benzo (a) pyrene in indoor air of Laibin and Reshui town both seriously exceeded the national indoor air quality standard. The excessive multiples were 132 and 64 respectively. For outdoor air in the two towns, benzo(a)pyrene was beyond the national environmental air quality standard limits just in Laibin town, the excessive multiple was 3.7,and the level of pollution increased compared with the past. The average people life-long cancer risks of benzo(a)pyrene for adults and children were 7.074×10-5 and 4.877×10-5 respectively ,lower than that of 20 years ago, but still above the acceptable risk level 10-6. Cancer risk for adults was 1-2 times as high as that of children. Conclusion In Xuanwei, indoor air pollution of PAHs is serious and life-long cancer risk for the local residents is above the acceptable risk level.更多还原