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Eslami N, Fadaei H, Abbasi J. Desalination of Historical Porous Materials Using Electro Kinetic Method: A Review to last Researches. KCR 2021; 4 (1) :65-78
URL: http://journal.richt.ir/kcr/article-1-176-en.html

Soluble salts are known as serious threat for monuments and historical porous materials. The alteration mechanism related by soluble salts such as rocks is essentially a physical process based on the stress level generated by the crystallization of the salts in the pores. In recent years many ways have been developed to extract or deactivate these salts. The efficiency of every desalination system is being evaluated by the amount of extracted soluble salts and the depth of treatment in material. In fact, ionic transport is result of a consortium of energies: kinetic energy, electric energy and chemical energy. These three energies are united together to move and extraction of soluble salts in an optimum  desalination system. The electro kinetic technique is a non-destructive method to extract soluble salts based on electric migration of ions inside the material. This method is even applicable for matrixes with very fine porosity and very low hydraulic permeability. In recent years this method
has been specially considered in European countries. High amount of extracted salts and deep effect on materials have been caused to happen many researches on this topic on historical heritage and considerable results have been gained. This article is a review of background, principles and generals of this method in conservation and desalination of historical porous materials which are threatened by soluble salts alteration. Results from traditional desalination ways are compared with this method as a pioneer technique show an improvement of the quality of desalination, saving time and high efficiency of this method.