Assessment of indoor air quality at an electronic cigarette (Vaping) convention
Assessment of indoor air quality at an electronic cigarette (Vaping) convention
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DOI：
10.1038/s41370-017-0005-x
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发表时间：
2018-11-01
影响因子：
4.5
通讯作者：
Rule, Ana M.
中科院分区：
文献类型：
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作者：
Chen, Rui;Aherrera, Angela;Rule, Ana M.
电子烟（vaping）公约是推广电子烟的公共活动，其中允许在室内使用电子烟。使用电子烟的人群集中，空气通风不良，会导致室内空气污染。为了估计这种最坏情况下的电子烟暴露，我们在美国马里兰州（MD）的一次电子烟会议上评估了室内空气质量。测量颗粒物（PM10）和实时总挥发性有机化合物（TVOCs），CO2和NO2浓度的实时浓度。还收集了空气尼古丁和PM10浓度的综合样品。在任何一个观察时间，与会者人数估计在75至600人之间。估计24小时时间加权平均（TWA）PM10为1800 μ g/m（3），比EPA 24小时规定（150 μ g/m（3））高12倍。室内TVOC浓度的中位数（范围）为0.13（0.04-0.3）ppm。PM10和TVOC浓度与CO2浓度高度相关，表明使用电子烟的人数很多，室内空气质量差。空气中的尼古丁浓度为125微克/立方米，相当于在酒吧和夜总会测量的浓度。电子烟大会中的电子烟气溶胶聚集了许多电子烟用户，是PM10，空气尼古丁和VOC的主要来源，损害了室内空气质量。这些发现也引起了电子烟供应商和其他场馆工作人员的职业担忧。
E-cigarette (vaping) conventions are public events promoting electronic cigarettes, in which indoor use of e-cigarettes is allowed. The large concentration of people using e-cigarettes and poor air ventilation can result in indoor air pollution. In order to estimate this worst-case exposure to e-cigarettes, we evaluated indoor air quality in a vaping convention in Maryland (MD), USA. Real-time concentrations of particulate matter (PM10) and real-time total volatile organic compounds (TVOCs), CO2 and NO2 concentrations were measured. Integrated samples of air nicotine and PM10 concentrations were also collected. The number of attendees was estimated to range from 75 to 600 at any single observation time. The estimated 24-h time-weighted average (TWA) PM10 was 1800 mu g/m(3), 12-fold higher than the EPA 24-h regulation (150 mu g/m(3)). Median (range) indoor TVOCs concentration was 0.13 (0.04-0.3) ppm. PM10 and TVOC concentrations were highly correlated with CO2 concentrations, indicating the high number of people using e-cigarettes and poor indoor air quality. Air nicotine concentration was 125 mu g/m(3), equivalent to concentrations measured in bars and nightclubs. E-cigarette aerosol in a vaping convention that congregates many e-cigarette users is a major source of PM10, air nicotine and VOCs, impairing indoor air quality. These findings also raise occupational concerns for e-cigarette vendors and other venue staff workers.