Electroosmotic permeability in kaolinite and CaCO3 poultice mixtures

IF 3.5 2区综合性期刊 0 ARCHAEOLOGY

Journal of Cultural Heritage Pub Date : 2024-06-06 DOI:10.1016/j.culher.2024.05.015

Naser Eslami , Jorge Feijoo , Juan M. Paz-Garcia , Elisa Franzoni , Lisbeth M. Ottosen

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Abstract

Electrokinetic treatment of masonry for desalination or electroosmotic dewatering depends on a poultice, in which the electrodes are placed, which fulfills several purposes. Poultice composed of kaolinite and CaCO₃ have been shown to have good workability and high pH buffering capacity. In this work, the electroosmotic (EO) permeability is studied in different kaolinite - CaCO₃ mixtures. In addition, the effect on EO of using NaCl as a mixing solution is investigated. A special cell is used to test the EO in the specimens. A phenomenological approach, based on the potential gradient and the flux of solution, was used to calculate the EO flow rate and EO permeability coefficient. Results showed that by increasing the concentration of CaCO₃ in the poultice mixture, the EO flow rate decreased and the poultice with 80 % CaCO₃ and more did not have any EO flow. Furthermore, the ionic strength in the mixing solution decreases the EO flow rate.

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高岭石和 CaCO3 膏药混合物中的电渗渗透性

对用于海水淡化或电渗脱水的砖石进行电动力处理，取决于放置电极的 "泥浆"，"泥浆 "具有多种功能。由高岭石和 CaCO3 组成的泥浆具有良好的可操作性和较高的 pH 缓冲能力。在这项工作中，研究了不同高岭石-CaCO3 混合物的电渗（EO）渗透性。此外，还研究了使用 NaCl 作为混合溶液对 EO 的影响。测试试样中的 EO 时使用了一个特殊的样品池。采用基于电位梯度和溶液通量的现象学方法计算环氧乙烷流速和环氧乙烷渗透系数。结果表明，随着膏药混合物中 CaCO3 浓度的增加，环氧乙烷流速降低，CaCO3 含量达到或超过 80% 的膏药没有任何环氧乙烷流动。此外，混合溶液中的离子强度也会降低环氧乙烷的流速。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Cultural Heritage 综合性期刊-材料科学：综合

CiteScore

6.80

自引率

9.70%

发文量

166

审稿时长

52 days

期刊介绍： The Journal of Cultural Heritage publishes original papers which comprise previously unpublished data and present innovative methods concerning all aspects of science and technology of cultural heritage as well as interpretation and theoretical issues related to preservation.