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Electrochemical desalination of bricks - Experimental and modeling

Skibsted, Gry; Ottosen, Lisbeth M.; Jensen, Pernille E. and Paz Garcia, Juan Manuel LU (2015) In Electrochimica Acta 181. p.24-30
Abstract
Chlorides, nitrates and sulfates play an important role in the salt-decay of porous materials in buildings and monuments. Electrochemical desalination is a technology able to remove salts from such porous materials in order to stop or prevent the decay. In this paper, experimental and numerical results for ED treatments of red bricks contaminated with NaCl, NaNO3, and Na2SO4 are presented and compared. The results show high removal efficiencies of similar to 99 % for Cl- and NO3-, and similar to 89 % for SO42- in less than 8 days when applying 2.22 A m(-2). The slightly slower removal rate in the sulfate-contaminated bricks with respect to the monovalent ions is discussed. Comparison between the experimental and the simulation results... (More)
Chlorides, nitrates and sulfates play an important role in the salt-decay of porous materials in buildings and monuments. Electrochemical desalination is a technology able to remove salts from such porous materials in order to stop or prevent the decay. In this paper, experimental and numerical results for ED treatments of red bricks contaminated with NaCl, NaNO3, and Na2SO4 are presented and compared. The results show high removal efficiencies of similar to 99 % for Cl- and NO3-, and similar to 89 % for SO42- in less than 8 days when applying 2.22 A m(-2). The slightly slower removal rate in the sulfate-contaminated bricks with respect to the monovalent ions is discussed. Comparison between the experimental and the simulation results showed that the proposed numerical model is able to predict electrochemical desalination treatments with remarkable accuracy, and it can be used as a predictive tool for the optimization and the design of the treatment. (C) 2015 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Electrokinetics, Desalination, Salt-decay, Electrode processes
in
Electrochimica Acta
volume
181
pages
24 - 30
publisher
Pergamon
external identifiers
  • wos:000363474500004
  • scopus:84945460074
ISSN
0013-4686
DOI
10.1016/j.electacta.2015.03.041
language
English
LU publication?
yes
id
c499f9e4-f4eb-45de-bca0-e704c8dfd118 (old id 8195222)
date added to LUP
2015-11-26 10:22:09
date last changed
2017-01-15 03:17:12
@article{c499f9e4-f4eb-45de-bca0-e704c8dfd118,
  abstract     = {Chlorides, nitrates and sulfates play an important role in the salt-decay of porous materials in buildings and monuments. Electrochemical desalination is a technology able to remove salts from such porous materials in order to stop or prevent the decay. In this paper, experimental and numerical results for ED treatments of red bricks contaminated with NaCl, NaNO3, and Na2SO4 are presented and compared. The results show high removal efficiencies of similar to 99 % for Cl- and NO3-, and similar to 89 % for SO42- in less than 8 days when applying 2.22 A m(-2). The slightly slower removal rate in the sulfate-contaminated bricks with respect to the monovalent ions is discussed. Comparison between the experimental and the simulation results showed that the proposed numerical model is able to predict electrochemical desalination treatments with remarkable accuracy, and it can be used as a predictive tool for the optimization and the design of the treatment. (C) 2015 Elsevier Ltd. All rights reserved.},
  author       = {Skibsted, Gry and Ottosen, Lisbeth M. and Jensen, Pernille E. and Paz Garcia, Juan Manuel},
  issn         = {0013-4686},
  keyword      = {Electrokinetics,Desalination,Salt-decay,Electrode processes},
  language     = {eng},
  pages        = {24--30},
  publisher    = {Pergamon},
  series       = {Electrochimica Acta},
  title        = {Electrochemical desalination of bricks - Experimental and modeling},
  url          = {http://dx.doi.org/10.1016/j.electacta.2015.03.041},
  volume       = {181},
  year         = {2015},
}