Department of Chemical and Environmental Engineering, Yale University, New Haven, CT, USA.
Max Planck Institute for Chemistry, Mainz 55128, Germany.
Sci Adv. 2020 Mar 4;6(10):eaay4109. doi: 10.1126/sciadv.aay4109. eCollection 2020 Mar.
The contamination of indoor nonsmoking environments with thirdhand smoke (THS) is an important, poorly understood public health concern. Real-time THS off-gassing from smokers into a nonsmoking movie theater was observed with online and offline high-resolution mass spectrometry. Prominent emission events of THS tracers (e.g., 2,5-dimethylfuran, 2-methylfuran, and acetonitrile) and other tobacco-related volatile organic compounds (VOCs) coincided with the arrival of certain moviegoers and left residual contamination. These VOC emission events exposed occupants to the equivalent of 1 to 10 cigarettes of secondhand smoke, including multiple hazardous air pollutants (e.g., benzene and formaldehyde) at parts-per-billion concentrations. Nicotine and related intermediate-volatility nitrogen-containing compounds, which vaporized from clothes/bodies and recondensed onto aerosol, comprised 34% of observed functionalized organic aerosol abundance. Exposure to THS VOC emission events will be considerably enhanced in poorly ventilated or smaller spaces in contrast with a large, well-ventilated theater-amplifying concentrations and potential impacts on health and indoor chemistry.
室内非吸烟环境中三手烟（THS）的污染是一个重要但尚未被充分认识的公共卫生问题。通过在线和离线高分辨率质谱法观察到吸烟者在非吸烟电影院中实时排放 THS。THS 示踪剂（例如 2,5-二甲基呋喃、2-甲基呋喃和乙腈）和其他与烟草相关的挥发性有机化合物（VOC）的突出排放事件与某些观影者的到来同时发生，并留下残留污染。这些 VOC 排放事件使居住者暴露在相当于 1 到 10 支二手烟的环境中，包括以十亿分之几浓度存在的多种有害空气污染物（例如苯和甲醛）。从衣服/身体蒸发并重新凝结到气溶胶上的尼古丁和相关的中挥发性含氮化合物占观察到的官能化有机气溶胶丰度的 34%。与大型、通风良好的剧院相比，在通风不良或较小的空间中，THS VOC 排放事件的暴露将大大增加，从而放大浓度并可能对健康和室内化学产生影响。
