Water Desalination Using Polyelectrolyte Hydrogel: Gibbs Ensemble Modeling

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F22%3A10452318" target="_blank" >RIV/00216208:11310/22:10452318 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=~XVXPX5sqJ" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=~XVXPX5sqJ</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/gels8100656" target="_blank" >10.3390/gels8100656</a>

Result language

angličtina

Original language name

Water Desalination Using Polyelectrolyte Hydrogel: Gibbs Ensemble Modeling

Original language description

Polyelectrolyte hydrogels can absorb a large amount of water across an osmotic membrane as a result of their swelling pressure. On the other hand, the insoluble cross-linked hydrogel network enables dewatering under the influence of external (thermal and/or mechanical) stimuli. Moreover, from a thermodynamic perspective, a polyelectrolyte hydrogel is already an osmotic membrane. These properties designate hydrogels as excellent candidates for use in desalination, at the same time avoiding the use of expensive membranes. In this article, we present our recent theoretical study of polyelectrolyte hydrogel usage for water desalination. Employing a coarse-grained model and the Gibbs ensemble, we modeled the thermodynamic equilibrium between the coexisting gel phase and the supernate aqueous salt solution phase. We performed a sequence of step-by-step hydrogel swellings and compressions in open and closed systems, i.e., in equilibrium with a large and with a comparably small reservoir of aqueous solution. The swelling in an open system removes ions from the large reservoir, whereas the compression in a closed system decreases the salt concentration in the small reservoir. We modeled this stepwise process of continuous decrease of water salinity from seawater up to freshwater concentrations and estimated the energy cost of the process to be comparable to that of reverse osmosis.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10404 - Polymer science

Project

<a href="/en/project/GJ19-17847Y" target="_blank" >GJ19-17847Y: Development of effective desalination methods using polyelectrolyte hydrogels</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Gels [online]

ISSN

2310-2861

e-ISSN

2310-2861

Volume of the periodical

8

Issue of the periodical within the volume

10

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

656

UT code for WoS article

000873094400001

EID of the result in the Scopus database

2-s2.0-85140603595