| Title: | Steady-State Based Model of Airborne Particle/Gas and Settled Dust/Gas Partitioning for Semivolatile Organic Compounds in the Indoor Environment |
| Author(s): | Li HL; Yang PF; Liu LY; Gong BB; Zhang ZF; Ma WL; Macdonald RW; Nikolaev AN; Li YF; |
| Address: | "International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (HIT), Harbin 150090, China. International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), Polar Academy/School of Environment, HIT, Harbin 150090, China. Heilongjiang Provincial Key Laboratory of Polar Environment and Ecosystem (HPKL-PEE), HIT, Harbin 150090, China. School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China. Department of Fisheries and Oceans, Institute of Ocean Sciences, P.O. Box 6000, Sidney, British Columbia V8L 4B2, Canada. Centre for Earth Observation Science, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada. Institute of Natural Sciences, North-Eastern Federal University, Yakutsk 677007, Russia. IJRC-PTS-NA, Toronto, Ontario M2N 6X9, Canada" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Indoor semivolatile organic compounds (SVOCs), present in the air, airborne particles, settled dust, and other indoor surfaces, can enter the human body through several pathways. Knowing the partitioning between gaseous and particulate phases is important in identifying specific pathway contributions and thereby accurately assessing human exposure. Numerous studies have developed equilibrium equations to predict airborne particle/gas (P/G) partitioning in air (K(P)) and dust/gas (D/G) partitioning in settled dust (K(D)). The assumption that P/G and D/G equilibria are instantaneous for airborne and settled dust phases, commonly adopted by current indoor fate models, is not likely valid for compounds with high octanol-air partition coefficients (K(OA)). Here, we develop steady-state based equations to predict K(P) and K(D) in the indoor environment. Results show that these equations perform well and are verified by worldwide monitoring data. It is suggested that instantaneous steady state could work for P/G and D/G partitioning of SVOCs in indoor environments, and the equilibrium is just a special case of the steady state when log K(OA) < 11.38 for P/G partitioning and log K(OA) < 10.38 for D/G partitioning. These newly developed equations and methods provide a tool for more accurate assessment for human exposure to SVOCs in the indoor environment" |
| Keywords: | "*Air Pollutants/analysis *Air Pollution, Indoor/analysis Dust/analysis Gases Humans *Phthalic Acids *Volatile Organic Compounds airborne particles indoor air quality partitioning semivolatile organic compound settled dust;" |
| Notes: | "MedlineLi, Hai-Ling Yang, Pu-Fei Liu, Li-Yan Gong, Bei-Bei Zhang, Zi-Feng Ma, Wan-Li Macdonald, Robie W Nikolaev, Anatoly N Li, Yi-Fan eng Research Support, Non-U.S. Gov't 2022/06/01 Environ Sci Technol. 2022 Jun 21; 56(12):8373-8383. doi: 10.1021/acs.est.1c07819. Epub 2022 May 30" |
