Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Efflorescence relative humidity of airborne sodium chloride particles: A theoretical investigation
AbstractThe previously developed theoretical model [Gao, Y., Chen, S.B., Yu, L.E., 2006. Efflorescence relative humidity for ammonium sulfate particles. Journal of Physical Chemistry A, 110, 7602–7608], which has successfully predicted the efflorescence relative humidity (ERH) of ammonium sulfate ((NH4)2SO4) particles at room temperature, is employed to estimate the ERH of sodium chloride (NaCl) particles in sizes ranging from 6nm to 20μm. The theoretical predictions well agree with the reported experimental data in literatures. When the NaCl particles are larger than 70nm, the ERH decreases with decreasing dry particle sizes, and reach a minimum around 44% RH, otherwise the ERH increases with decreasing dry particle sizes (<70nm) because of the Kelvin effect. Compared with (NH4)2SO4 particles, the Kelvin effect on ERH is stronger for NaCl particles smaller than 30nm, while the dry particle size exerts weaker influence on NaCl particles larger than 70nm.
Efflorescence relative humidity of airborne sodium chloride particles: A theoretical investigation
AbstractThe previously developed theoretical model [Gao, Y., Chen, S.B., Yu, L.E., 2006. Efflorescence relative humidity for ammonium sulfate particles. Journal of Physical Chemistry A, 110, 7602–7608], which has successfully predicted the efflorescence relative humidity (ERH) of ammonium sulfate ((NH4)2SO4) particles at room temperature, is employed to estimate the ERH of sodium chloride (NaCl) particles in sizes ranging from 6nm to 20μm. The theoretical predictions well agree with the reported experimental data in literatures. When the NaCl particles are larger than 70nm, the ERH decreases with decreasing dry particle sizes, and reach a minimum around 44% RH, otherwise the ERH increases with decreasing dry particle sizes (<70nm) because of the Kelvin effect. Compared with (NH4)2SO4 particles, the Kelvin effect on ERH is stronger for NaCl particles smaller than 30nm, while the dry particle size exerts weaker influence on NaCl particles larger than 70nm.
Efflorescence relative humidity of airborne sodium chloride particles: A theoretical investigation
Gao, Yonggang (Autor:in) / Chen, Shing Bor (Autor:in) / Yu, Liya E. (Autor:in)
Atmospheric Environment ; 41 ; 2019-2023
05.12.2006
5 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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