Simplified speciation and atmospheric volatile organic compound emission rates from non-aerosol personal care products |
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Authors: | Amber M Yeoman Marvin Shaw Nicola Carslaw Tim Murrells Neil Passant Alastair C Lewis |
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Affiliation: | 1. Wolfson Atmospheric Chemistry Laboratories, University of York, York, UK;2. Wolfson Atmospheric Chemistry Laboratories, University of York, York, UK
National Centre for Atmospheric Science, University of York, York, UK;3. Department of Environment and Geography, University of York, York, UK;4. Ricardo Energy & Environment Gemini Building, Harwell, UK |
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Abstract: | Volatile organic compounds (VOCs) emitted from personal care products (PCPs) can affect indoor air quality and outdoor air quality when ventilated. In this paper, we determine a set of simplified VOC species profiles and emission rates for a range of non-aerosol PCPs. These have been constructed from individual vapor analysis from 36 products available in the UK, using equilibrium headspace analysis with selected-ion flow-tube mass spectrometry (SIFT-MS). A simplified speciation profile is created based on the observations, comprising four alcohols, two cyclic volatile siloxanes, and monoterpenes (grouped as limonene). Estimates are made for individual unit-of-activity VOC emissions for dose-usage of shampoos, shower gel, conditioner, liquid foundation, and moisturizer. We use these values as inputs to the INdoor air Detailed Chemical Model (INDCM) and compare results against real-world case-study experimental data. Activity-based emissions are then scaled based on plausible usage patterns to estimate the potential scale of annual per-person emissions for each product type (eg, 2 g limonene person?1 yr?1 from shower gels). Annual emissions from non-aerosol PCPs for the UK are then calculated (decamethylcyclopentasiloxane 0.25 ktonne yr?1 and limonene 0.15 ktonne yr?1) and these compared with the UK National Atmospheric Emissions Inventory estimates for non-aerosol cosmetics and toiletries. |
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Keywords: | emission inventories indoor air quality modeling mass spectrometry personal care products siloxanes VOCs |
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