The theoretical calculation of activity coefficients in the use of baromembrane methods for water treatment

Engineering Surveying & Deformation Monitoring

Authors

First and Last Name Academic degree E-mail Affiliation
Maryna Kravchenko Ph.D. marina-diek [at] ukr.net Kyiv national university of construction and architecture
Kyiv, Ukraine
Oksana Hunchenko Ph.D. gunchenko.oksana [at] gmail.com Kyiv national university of construction and architecture
Kyiv, Ukraine
Yuliia Bereznytska Ph.D. Juli_mmm [at] ukr.net Kyiv national university of construction and architecture
Kyiv, Ukraine
Lesya Vasylenko Ph.D. lesya.kiev [at] ukr.net Kyiv national university of construction and architecture
Kyiv, Ukraine
Haba Kristina Ph.D. marina-diek [at] ukr.net Kyiv national university of construction and architecture
Kyiv, Ukraine

I and my co-authors (if any) authorize the use of the Paper in accordance with the Creative Commons CC BY license

First published on this website: 28.08.2021 - 14:11
Abstract 

Baromembrane methods are a modern tool for implementing a number of priority areas of science, technology and engineering. One of the main problems in the use of baromembrane methods in water treatment processes is the problem of calculating one of the main parameters of these processes - osmotic pressure. For medium and high values of concentration, due to deviations of thermodynamic equations from ideality due to electrostatic forces and forces of intermolecular interaction, in the formula for calculating osmotic pressure it is necessary to enter values of activity coefficients. The existing methods of calculation of activity coefficients are analyzed in the article and the method of theoretical calculation of activity coefficients in the process of using baromembrane methods for water treatment is offered.

Keywords 
Osmotic pressure
baromembrane methods
aqueous solution
activity coefficient
ion
thermodynamic processes
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