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Title: Charging and coagulation of radioactive and nonradioactive particles in the atmosphere

Abstract

Charging and coagulation influence one another and impact the particle charge and size distributions in the atmosphere. However, few investigations to date have focused on the coagulation kinetics of atmospheric particles accumulating charge. This study presents three approaches to include mutual effects of charging and coagulation on the microphysical evolution of atmospheric particles such as radioactive particles. The first approach employs ion balance, charge balance, and a bivariate population balance model (PBM) to comprehensively calculate both charge accumulation and coagulation rates of particles. The second approach involves a much simpler description of charging, and uses a monovariate PBM and subsequent effects of charge on particle coagulation. The third approach is further simplified assuming that particles instantaneously reach their steady-state charge distributions. It is found that compared to the other two approaches, the first approach can accurately predict time-dependent changes in the size and charge distributions of particles over a wide size range covering from the free molecule to continuum regimes. The other two approaches can reliably predict both charge accumulation and coagulation rates for particles larger than about 0.04 micrometers and atmospherically relevant conditions. Here, these approaches are applied to investigate coagulation kinetics of particles accumulating charge in a radioactivemore » neutralizer, the urban atmosphere, and an atmospheric system containing radioactive particles. Limitations of the approaches are discussed.« less

Authors:
 [1];  [1];  [1];  [2]
  1. Georgia Inst. of Technology, Atlanta, GA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
Work for Others (WFO); USDOE
OSTI Identifier:
1214013
Alternate Identifier(s):
OSTI ID: 1344282
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Atmospheric Chemistry and Physics (Online)
Additional Journal Information:
Journal Name: Atmospheric Chemistry and Physics (Online); Journal Volume: 16; Journal Issue: 5; Journal ID: ISSN 1680-7324
Publisher:
European Geosciences Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 07 ISOTOPE AND RADIATION SOURCES

Citation Formats

Kim, Yong-ha, Yiacoumi, Sotira, Nenes, Athanasios, and Tsouris, Costas. Charging and coagulation of radioactive and nonradioactive particles in the atmosphere. United States: N. p., 2016. Web. doi:10.5194/acp-16-3449-2016.
Kim, Yong-ha, Yiacoumi, Sotira, Nenes, Athanasios, & Tsouris, Costas. Charging and coagulation of radioactive and nonradioactive particles in the atmosphere. United States. https://doi.org/10.5194/acp-16-3449-2016
Kim, Yong-ha, Yiacoumi, Sotira, Nenes, Athanasios, and Tsouris, Costas. Fri . "Charging and coagulation of radioactive and nonradioactive particles in the atmosphere". United States. https://doi.org/10.5194/acp-16-3449-2016. https://www.osti.gov/servlets/purl/1214013.
@article{osti_1214013,
title = {Charging and coagulation of radioactive and nonradioactive particles in the atmosphere},
author = {Kim, Yong-ha and Yiacoumi, Sotira and Nenes, Athanasios and Tsouris, Costas},
abstractNote = {Charging and coagulation influence one another and impact the particle charge and size distributions in the atmosphere. However, few investigations to date have focused on the coagulation kinetics of atmospheric particles accumulating charge. This study presents three approaches to include mutual effects of charging and coagulation on the microphysical evolution of atmospheric particles such as radioactive particles. The first approach employs ion balance, charge balance, and a bivariate population balance model (PBM) to comprehensively calculate both charge accumulation and coagulation rates of particles. The second approach involves a much simpler description of charging, and uses a monovariate PBM and subsequent effects of charge on particle coagulation. The third approach is further simplified assuming that particles instantaneously reach their steady-state charge distributions. It is found that compared to the other two approaches, the first approach can accurately predict time-dependent changes in the size and charge distributions of particles over a wide size range covering from the free molecule to continuum regimes. The other two approaches can reliably predict both charge accumulation and coagulation rates for particles larger than about 0.04 micrometers and atmospherically relevant conditions. Here, these approaches are applied to investigate coagulation kinetics of particles accumulating charge in a radioactive neutralizer, the urban atmosphere, and an atmospheric system containing radioactive particles. Limitations of the approaches are discussed.},
doi = {10.5194/acp-16-3449-2016},
journal = {Atmospheric Chemistry and Physics (Online)},
number = 5,
volume = 16,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2016},
month = {Fri Jan 01 00:00:00 EST 2016}
}

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