Abstract
Salt weathering is recognized as one of the main deterioration mechanisms that affect cultural heritage. The damage caused by this decay mechanism can range from simple aesthetic damage, when salts crystallize on the surface as efflorescence, to cause the loss of material, when salts crystalize beneath the material surface as sub- and crypto-efflorescence. To reduce the risk associated with salt-induced deterioration, the use of electrokinetic treatments, as desalination applied on-site, is undoubtedly the one that has allowed obtaining high extraction percentages in a short period of time. This study evaluates the efficacy of a new double electrode system at the anode (DA setup), to overcome the results achieved with the traditional electrokinetic configuration, using only one electrode (SA setup), to desalinate a brick masonry wall, located in the ancient stables of the eighteenth century Bernstorff Palace (Gentofte-Denmark), which is affected by salt-induced decay. The obtained results show that the DA setup allows maintaining higher moisture content in poultices located at the anode than using SA setup. This fact allows a proper and lasting current flow, which enhances the removal efficacy of all the anions present in the wall.
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Acknowledgements
This research was funded by the TOP Heritage program (P2018/NMT-4372) of the Community of Madrid. J. Feijoo’s work is supported by the Ministerio de Ciencia Innovación y Universidades, Spanish Government, through a Juan de la Cierva grant. Special acknowledgments to the professional support of the Interdisciplinary Thematic Platform from CSIC Open Heritage: Research and Society (PTI-PAIS) and an I-COOP 2018 cooperation project (COOPB20379) between the coauthors of this paper (Egypt and Spain), funded by CSIC.
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Feijoo, J., de Buergo, M.A., Fort, R., Aly, N. (2023). Experimental Study of Different Electrokinetic Configurations for Desalination of a Brick Wall. In: El-Qady, G.M., Margottini, C. (eds) Sustainable Conservation of UNESCO and Other Heritage Sites Through Proactive Geosciences. Springer Geology. Springer, Cham. https://doi.org/10.1007/978-3-031-13810-2_6
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