Brine Rejection from Freezing Salt Solutions: A Molecular Dynamics Study

Luboš Vrbka and Pavel Jungwirth
Phys. Rev. Lett. 95, 148501 – Published 27 September 2005

Abstract

The atmospherically and technologically very important process of brine rejection from freezing salt solutions is investigated with atomic resolution using molecular dynamics simulations. The present calculations allow us to follow the motion of each water molecule and salt ion and to propose a microscopic mechanism of brine rejection, in which a fluctuation (reduction) of the ion density in the vicinity of the ice front is followed by the growth of a new ice layer. The presence of salt slows down the freezing process, which leads to the formation of an almost neat ice next to a disordered brine layer.

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  • Received 16 June 2005

DOI:https://doi.org/10.1103/PhysRevLett.95.148501

©2005 American Physical Society

Authors & Affiliations

Luboš Vrbka and Pavel Jungwirth*

  • Institute of Organic Chemistry and Biochemistry and Center for Biomolecules and Complex Molecular Systems, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Prague 6, Czech Republic

  • *Corresponding author. pavel.jungwirth@uochb.cas.cz

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Issue

Vol. 95, Iss. 14 — 30 September 2005

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