| Title: | Volatile organic compound and particulate matter emissions from an ultrasonic essential oil diffuser |
| Author(s): | Schwartz-Narbonne H; Du B; Siegel JA; |
| Address: | "Department of Chemistry, University of Toronto, Toronto, ON, Canada. Department of Civil and Mineral Engineering, University of Toronto, Toronto, ON, Canada. Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada" |
| ISSN/ISBN: | 1600-0668 (Electronic) 0905-6947 (Linking) |
| Abstract: | "Ultrasonic essential oil diffusers (EODs) are a popular type of indoor scenting source. We performed a chamber study in which we measured the emissions from EODs used with lemon, lavender, eucalyptus, and grapeseed oils. Over the course of 15 min, the most abundant VOCs released from lemon, lavender, eucalyptus, and grapeseed oils were 2.6 +/- 0.7 mg of d-limonene, 3.5 +/- 0.4 mg of eucalyptol, 1.0 +/- 0.1 mg of linalyl acetate, and 0.2 +/- 0.02 mg of linalyl acetate, respectively. Each oil had a unique particulate matter (PM) emission profile in terms of size, number density, and rate. The dominant size ranges of the PM were 10-100 nm for lemon oil, 50-100 nm for lavender oil, 10-50 nm for lemon oil, and above 200 nm for grapeseed oil. PM(1) emission rates of approximately 2 mg/h, 0.1 mg/h, and 3 mg/h, were observed for lemon, lavender/eucalyptus, and grapeseed oils, respectively. A fivefold increase in PM(1) emission was measured when the EOD with eucalyptus oil was filled with tap water as opposed to deionized water. Modeling suggests that reasonable use cases of EODs can contribute substantially to primary and secondary PM in indoor environments, but this potential varies depending on the oil and water types used" |
| Keywords: | "*Air Pollutants/analysis *Air Pollution, Indoor/analysis *Oils, Volatile Particulate Matter/analysis Ultrasonics *Volatile Organic Compounds/analysis Pm2.5 Voc humidifier emissions indoor source primary emissions scenting source;" |
| Notes: | "MedlineSchwartz-Narbonne, Heather Du, Bowen Siegel, Jeffrey A eng Research Support, Non-U.S. Gov't England 2021/04/28 Indoor Air. 2021 Nov; 31(6):1982-1992. doi: 10.1111/ina.12845. Epub 2021 Apr 27" |
