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DOI	10.1016/j.atmosenv.2020.117731
	Characteristics of secondhand cannabis smoke from common smoking methods: Calibration factor, emission rate, and particle removal rate
	Zhao T.; Cheng K.-C.; Ott W.R.; Wallace L.; Hildemann L.M.
发表日期	2020
ISSN	13522310
卷号	242
英文摘要	The widespread legalization of recreational cannabis use raises growing concerns about exposure to secondhand cannabis smoke (SCS). However, few studies are characterizing fine particulate matter (PM2.5) exposure from SCS. Here, we determined PM2.5 calibration factors (CFs) for SCS from four common cannabis consuming methods—glass pipe smoking, joint smoking, bong smoking, and cannabis pen vaping—for widely used optical monitors (SidePak™ AM510, TSI Inc., Shoreview, MN) by comparing the monitors with gravimetric mass measurements. We furthermore investigated the emission rate, particle size distribution, and particle removal rate of SCS. The CFs of SidePak PM2.5 monitors measuring the four types of SCS were 0.31 (SE = 0.02), 0.39 (SE = 0.02), 0.40 (SE = 0.01), and 0.44 (SE = 0.03), respectively. The arithmetic mean emission rates of the four SCS sources were ~2–6 times that of secondhand tobacco smoke (STS) on a per-puff basis. The fresh SCS (1-min after smoking) showed a bimodal size distribution—one mode located at ~380–420 nm and another at ~800–840 nm. Under low-ventilation conditions, the indoor removal rates of SCS from cannabis vaping were slightly higher (i.e., 0.61–0.77/h) than those for the other three sources (i.e., 0.35–0.53/h). © 2020 Elsevier Ltd
英文关键词	Aerosols; Calibration factor; Cannabis; Emission rate; Marijuana; Particulate matter; PM2.5; Removal rate; Size distribution
语种	英语
scopus关键词	Calibration; Indoor air pollution; Particle size; Particle size analysis; Particulate emissions; Size distribution; Ventilation; Arithmetic mean; Bimodal size distribution; Calibration factors; Fine particulate matter (PM2.5); Gravimetric mass; Low ventilation; Optical monitors; Particle removal; Smoke; cannabis; tobacco smoke; detection method; emission; particle size; particulate matter; pollutant removal; size distribution; smoke; smoking; aerosol; Article; cannabis smoking; cigarette smoking; evaporation; heating; human; particle size; particulate matter; passive smoking; pipe smoking; priority journal; vaping; Cannabis; Cannabis sativa; Neptunia; Nicotiana tabacum
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/152984
作者单位	Civil and Environmental Engineering, Stanford University, StanfordCA 94305, United States
推荐引用方式 GB/T 7714	Zhao T.,Cheng K.-C.,Ott W.R.,et al. Characteristics of secondhand cannabis smoke from common smoking methods: Calibration factor, emission rate, and particle removal rate[J],2020,242.
APA	Zhao T.,Cheng K.-C.,Ott W.R.,Wallace L.,&Hildemann L.M..(2020).Characteristics of secondhand cannabis smoke from common smoking methods: Calibration factor, emission rate, and particle removal rate.Atmospheric Environment,242.
MLA	Zhao T.,et al."Characteristics of secondhand cannabis smoke from common smoking methods: Calibration factor, emission rate, and particle removal rate".Atmospheric Environment 242(2020).