Zhang Manwen, Zhang Sukun, Feng Guixian, Su Hui, Zhu Fengzhi, Ren Mingzhong, Cai Zongwei
Partner State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China; South China Institute of Environmental Science, MEP, Guangzhou, China.
South China Institute of Environmental Science, MEP, Guangzhou, China.
Environ Res. 2017 Apr;154:60-65. doi: 10.1016/j.envres.2016.12.021. Epub 2016 Dec 28.
To identify the sources of PM pollutants in work environments and determine whether the air quality inside an office was affected by a change in outdoor pollution status, concurrent indoor and outdoor measurements of PM were conducted at five different office spaces in the urban center of Guangzhou on low pollution days (non-episode days, NEDs), and high pollution days (haze episode days, EDs). Indoor-outdoor relationships between the PM mass and its chemical constituents, which included water-soluble ions, carbonaceous species, and metal elements, were investigated. A principle component analysis (PCA) was performed to further confirm the relationship between the indoor and outdoor PM pollution. The results reveal that (1) Printing and ETS (Environmental tobacco smoking) were found to be important office PM sources and associated with the enrichment of SO, OC, EC and some toxic metals indoors; (2) On EDs, serious outdoor pollution and higher air exchange rate greatly affected all studied office environments, masking the original differences of the indoor characteristics (3) Fresh air system could efficiently filter out most of the outside pollutants on both NEDs and EDs. Overall, the results of our study suggest that improper human behavior is associated with the day-to-day generation of indoor PM levels and sporadic outdoor pollution events can lead to poor indoor air quality in urban office environments. Moreover, fresh air system has been experimentally proved with data as an effective way to improve the air quality in office.
为了识别工作环境中细颗粒物（PM）污染物的来源，并确定办公室内空气质量是否受到室外污染状况变化的影响，在广州市中心的五个不同办公空间，于低污染日（非污染事件日，NEDs）和高污染日（雾霾事件日，EDs）同步进行了室内和室外PM测量。研究了PM质量与其化学成分（包括水溶性离子、含碳物质和金属元素）之间的室内外关系。进行了主成分分析（PCA）以进一步确认室内和室外PM污染之间的关系。结果表明：（1）发现打印和环境烟草烟雾（ETS）是重要的办公PM来源，并且与室内SO、有机碳（OC）、元素碳（EC）和一些有毒金属的富集有关；（2）在雾霾事件日，严重的室外污染和较高的空气交换率极大地影响了所有研究的办公环境，掩盖了室内特征的原始差异；（3）新风系统在非污染事件日和雾霾事件日都能有效过滤掉大部分室外污染物。总体而言，我们的研究结果表明，不当的人类行为与室内PM水平的日常产生有关，偶发的室外污染事件会导致城市办公环境中室内空气质量变差。此外，新风系统已通过数据实验证明是改善办公室空气质量的有效方法。
