Deliquescence behaviour of single levitated ternary salt/carboxylic acid/water microdroplets

Faraday Discussions
Lennart TreuelR Zellner

Abstract

The deliquescence relative humidities (DRH) of ammonium sulfate as well as ammonium sulfate/dicarboxylic acid (glutaric, maleic and tartaric) mixtures as a function of temperature and relative composition have been studied using an electrodynamic balance (EDB) in connection with optical microscopy and Mie scattering. The absolute DRH values for pure ammonium sulfate as well as their temperature dependence are consistent with literature data and with the AIM model of Clegg et al. The addition of either glutaric or maleic acid to ammonium sulfate leads to a decrease of the DRH value, with the temperature dependence either remaining constant (glutaric acid) or increasing (maleic acid) with increasing acid concentration. This difference is attributed to the higher acidity of maleic acid, which generates stronger ionic interactions with the ammonium sulfate system. In the case of tartaric acid, the deliquescence behaviour of ammonium sulfate is substantially influenced by the formation of insoluble ammonium tartrate.

References

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Citations

Oct 25, 2011·The Journal of Physical Chemistry. a·Keith D BeyerChristian S Pearson
Apr 25, 2012·The Journal of Physical Chemistry. a·Andreas PeckhausReinhard Zellner
Jul 9, 2014·The Journal of Physical Chemistry. a·Benjamin J Dennis-SmitherJonathan P Reid
Sep 4, 2009·Physical Chemistry Chemical Physics : PCCP·L TreuelR Zellner
Jun 29, 2012·Chemical Society Reviews·Ulrich K KriegerJonathan P Reid
Apr 8, 2011·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Lennart TreuelReinhard Zellner
May 17, 2019·Faraday Discussions·Helen J ZengMark A Johnson
Jul 19, 2018·The Journal of Physical Chemistry. a·Kosuke NegishiJun-Ya Kohno
Mar 8, 2008·Environmental Science & Technology·E DinarY Rudich

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