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Influence of Semi-volatile Species on Particle Hygroscopic Growth : Volume 9, Issue 1 (22/01/2009)

By Villani, P.

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Book Id: WPLBN0003976935
Format Type: PDF Article :
File Size: Pages 27
Reproduction Date: 2015

Title: Influence of Semi-volatile Species on Particle Hygroscopic Growth : Volume 9, Issue 1 (22/01/2009)  
Author: Villani, P.
Volume: Vol. 9, Issue 1
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Monier, M., Sellegri, K., Laj, P., & Villani, P. (2009). Influence of Semi-volatile Species on Particle Hygroscopic Growth : Volume 9, Issue 1 (22/01/2009). Retrieved from http://community.ebooklibrary.org/


Description
Description: UMR6016, Laboratoire de Météorologie Physique (LaMP), Observatoire de Physique du Globe de Clermont-Ferrand Université Blaise Pascal, Clermont-Ferrand, France. The hygroscopic properties of aerosol particles are often related to their content of soluble material, on the basis of the Kohler theory. Recent studies, however, seem to indicate that the role of aerosol particle semi-volatile fraction properties has been underestimated. In this study, we use a novel method based on a Tandem Differential Mobility Analyser (TDMA) system combining particle volatilization and humidification conditioning (VH-TDMA) to test the effect of the gentle volatilization of a small fraction of the atmospheric particles on the particle hygroscopic growth in several environments (urban to remote). Results show that the particle hygroscopic properties can either be enhanced or decreased after thermal conditioning of the particle at moderate temperatures (50 to 110°C). The hygroscopic growth factor changes induced by volatilization indicate that some volatile compounds, although present at low concentrations, drastically influence the hygroscopic growth of particles in the way that can not be predicted by the Kohler theory at equilibrium.

Summary
Influence of semi-volatile species on particle hygroscopic growth

Excerpt
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