Characteristics and Health Risk Assessment of PolycyclicAromatic Hydrocarbons in Junior Middle School in Xi’an
- 作者：NIU Xin-YiCAO Jun-JiXU Hong-MeiGUINOT BenjaminShun-ChengCAO Nan-YingLAI Sen-Chao
- 会议时间：2012-11-16
- 关键词：PM2.5 ; PAHs ; health risk assessment ; junior middle school ; Xi’an
- 作者单位：NIU Xin-Yi,Shun-Cheng,LAI Sen-Chao(Department of Civil and Structural Engineering, The Hong Kong Polytechnic University,Kowloon, Hong Kong)CAO Jun-Ji(SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075 Institute of Global Environmental Change, Xi’an Jiaotong University, Xi'an 710049)XU Hong-Mei(SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075 Graduate University of Chinese Academy of Science, Beijing 100049)GUINOT Benjamin,CAO Nan-Ying(SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075)
- 母体文献：中国环境科学学会室内环境与健康分会第五届年会论文集
- 会议名称：中国环境科学学会室内环境与健康分会第五届年会
- 会议地点：长沙
- 主办单位：中国环境科学学会
- 语种：chi
摘要
The concentrations of polycyclic aromatic hydrocarbons(PAHs)in different-sized airborne particles(from PM0.25 to PM2.5) were measured in a junior middle school in Xi’an from 8 March 2012 to 22 March 2012.The average PAHs concentration was 82.57 ng·m-3 and the dominant species were Fluorene (FLO), Phenanthrene(PHE), Chrysene (CHR), Benzo[b]fluoranthene (BbF) and Benzo[e]pyrene (BeP). The average outdoor PAHslevel was higher than the indoor level. BaP, the most carcinogenic PAH, was at an average level of 3.24 ng·m-3.PAHs concentration in PM0.25 was much higher than that in larger size particles. Due to its respirable size, itcaused greater health impacts on human, especially for the teenagers in this study. The average BEQ (BaPEquivalent Concentration) was 9.30 and was higher in outdoor air. BaP, followed by BbF and DahA, contributedthe most to BEQ among all measured PAHs, and these three PAHs accounted for 76.37% of the total BEQ.Combustion is the main source of PAHs in ambient air. The health risk assessment of PAHs for the students wasevaluated.