|Autor||De Clercq, H. and Vanhellemont, Y. and De Swaef, V.|
|Titel||Salt extraction of limestone by means of electrophoresis: some results on type of contact material and electrode position|
|Link||Datei:30 SWBSS-2014 De Clercq etal.pdf|
|Bemerkungen||In: De Clercq, Hilde (editor): Proceedings of SWBSS 2014. Third International Conference on Salt Weathering of Buildings and Stone Sculptures Royal Institute for Cultural Heritage, Brussels, Belgium, 14-16 October 2022, S. 421-434|
Eintrag in der Bibliographie
|[De Clercq.etal:2014]||De Clercq, H.; Vanhellemont, Y.; De Swaef, V. (2014): Salt extraction of limestone by means of electrophoresis some results on type of contact material and electrode position. In: Hilde De Clercq (Hrsg.): Proceedings of SWBSS 2014 3rd International Conference on Salt Weathering of Buildings and Stone Sculptures,KIK-IRPA, Royal Institute for Cultural Heritage Brussels 421-434, 10.5165/hawk-hhg/249|
electrophoresis, limestone, contact material, sodium chloride, sodium sulphate
This paper describes some results of salt extraction by means of electrophoresis on limestone contaminated with two types of salts: NaCl and Na2SO4. Limestone plates in various dimensions have been tested. The electrophoresis is evaluated in terms of the measured current during the electrophoresis process and the remaining amount of salts in the samples, determined by conductivity measurements of the water extract. Three different contact materials have been tested: cotton, cellulose fibers and a mixture consisting of calcite powder and cellulose fibers. Results have shown that the last is the most efficient one. Two different electrode configurations have been tested on one type of the limestone plates. Results have shown that salts are removed from zones not necessarily positioned right between or physically in contact with the electrodes. There are indications that a better efficiency is obtained in case the electrodes are positioned on opposite sides, compared to an electrode-layout by which the electrodes are on the same side of the sample. It seems that the efficiency of the electrophoresis does not depend on the size of the electrodes, as long as the contact material is spread over the entire surface of the sample to be salt extracted.
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