Crilley L R, Ayoko G A, Mazaheri M, Morawska L
International Laboratory for Air Quality and Health, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, 4059, Australia.
International Laboratory for Air Quality and Health, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, 4059, Australia.
Environ Pollut. 2016 Jan;208(Pt A):249-255. doi: 10.1016/j.envpol.2015.04.017. Epub 2015 May 4.
This comprehensive study aimed to determine the sources and driving factors of organic carbon (OC) and elemental carbon (EC) concentrations in ambient PM2.5 in urban schools. Sampling was conducted outdoors at 25 schools in the Brisbane Metropolitan Area, Australia. Concentrations of primary and secondary OC were quantified using the EC tracer method, with secondary OC accounting for an average of 60%. Principal component analysis distinguished the contributing sources above the background and identified groups of schools with differing levels of primary and secondary carbonaceous aerosols. Overall, the results showed that vehicle emissions, local weather conditions and secondary organic aerosols (SOA) were the key factors influencing concentrations of carbonaceous component of PM2.5 at these schools. These results provide insights into children's exposure to vehicle emissions and SOA at such urban schools.
这项综合性研究旨在确定城市学校环境空气中细颗粒物（PM2.5）中有机碳（OC）和元素碳（EC）浓度的来源及驱动因素。在澳大利亚布里斯班都会区的25所学校户外进行了采样。采用EC示踪法对一次有机碳和二次有机碳的浓度进行了量化，二次有机碳平均占60%。主成分分析区分了背景之上的贡献源，并识别出了一次和二次碳质气溶胶水平不同的学校组。总体而言，结果表明车辆排放、当地天气条件和二次有机气溶胶（SOA）是影响这些学校PM2.5中碳质成分浓度的关键因素。这些结果为了解城市学校儿童接触车辆排放物和SOA的情况提供了见解。
