| Title: | Gas/particle partitioning of semi-volatile organic compounds in the atmosphere: Transition from unsteady to steady state |
| Author(s): | Li YF; Qiao LN; Ren NQ; Macdonald RW; Kannan K; |
| 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, HIT (PA-HIT), Harbin 150090, China; Heilongjiang Provincial Key laboratory of Polar Environment and Ecosystem (HPKL-PEE), School of Environment, HIT, Harbin 150090, China; IJRC-PTS-NA, Toronto M2N 6X9, Canada. Electronic address: ijrc_pts_paper@yahoo.com. 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, HIT (PA-HIT), Harbin 150090, China; Heilongjiang Provincial Key laboratory of Polar Environment and Ecosystem (HPKL-PEE), School of Environment, HIT, Harbin 150090, China. 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, HIT (PA-HIT), Harbin 150090, China. Institute of Ocean Sciences, Department of Fisheries and Oceans, P.O. Box 6000, Sidney, BC V8L 4B2, Canada. Wadsworth Center, New York State Department of Health, Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany, Empire State Plaza, P.O. Box 509, Albany, NY 12201-0509, USA" |
| DOI: | 10.1016/j.scitotenv.2019.136394 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "We derive differential equations to determine the kinetics of gas/particle partitioning of semi-volatile organic compounds (SVOCs). These equations model the transient states from initiation of sorption to particles (non-steady state) through the establishment of steady state. Two hypothetical scenarios are examined: (1) exchange of SVOCs between gas- and particle-phases alone; and (2) both gas/particle partitioning and wet and dry deposition of particles. The differential equations show that, under Scenario 1, a steady state is reached as an equilibrium between gas- and particle-phases, whereas under Scenario 2, the attained steady state is not in equilibrium. Our model shows that SVOCs in atmosphere where particle deposition is occurring reach a steady non-equilibrium state sooner than they would reach equilibrium under Scenario 1. We infer that SVOCs in the atmosphere will reach steady state instead of equilibrium between gaseous and particulate phases in circumstances where wet and dry deposition of particles cannot be neglected. In addition, our study indicates that the time for SVOCs to reach steady state in the atmosphere is fast, most likely within minutes or hours, suggesting that SVOCs are in steady or quasi-steady state in the atmosphere. Our analysis also reveals that gas/particle partitioning and particle deposition of SVOCs are dependent on each other" |
| Keywords: | Gas/particle partition Particle deposition Semi-volatile organic compounds Steady state Transition; |
| Notes: | "PubMed-not-MEDLINELi, Yi-Fan Qiao, Li-Na Ren, Nan-Qi Macdonald, Robie W Kannan, Kurunthachalam eng Netherlands 2020/01/11 Sci Total Environ. 2020 Mar 25; 710:136394. doi: 10.1016/j.scitotenv.2019.136394. Epub 2019 Dec 30" |
