Combined wicking and evaporation of NaCl solution with efflorescence formation: The efflorescence exclusion zone
Combined wicking and evaporation of NaCl solution with efflorescence formation: The efflorescence exclusion zone
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DOI：
10.1063/5.0007548
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发表时间：
2020-06-01
影响因子：
4.6
通讯作者：
Prat, Marc
中科院分区：
文献类型：
--
作者：
Lazhar, Ramzi;Najjari, Mustapha;Prat, Marc
本文提出了一种结合毛细作用和蒸发作用的NaCl溶液并导致盐泛霜形成的实验。实验结果表明，除样品底部区域外，在暴露于蒸发的多孔介质表面上均发生风化。这个区域保持无风化，称为禁区。结果表明，排阻区的范围取决于底部水库中的溶质浓度。一个模型的开发，它有助于理解的排斥现象。解释和模拟了禁区上边界的拱形。这项研究也被视为一个成功的测试模型的风化生长驱动的蒸发和盐沉淀在以前的研究。该建模方法有望帮助开发更好的模型，盐输运与结晶在多孔介质的表面与土壤盐渍化问题或盐风化的多孔材料。由AIP Publishing授权出版。
An experiment combining wicking and evaporation of a NaCl solution and leading to the formation of salt efflorescence is presented. The experiment shows that efflorescence develops over the porous medium surface exposed to evaporation except in the bottom region of the sample. This region remains free of efflorescence and is called the exclusion zone. It is shown that the exclusion zone extent depends on the solute concentration in the bottom reservoir. A model is developed, and it helps understand the exclusion phenomenon. The arch shape of the exclusion zone upper boundary is explained and modeled. The study is also seen as a successful test for the model of efflorescence growth driven by evaporation and salt precipitation presented in a previous study. The modeling approach is expected to help develop better models of salt transport with crystallization at the surface of porous media in relation with soil salinization issues or the salt weathering of porous materials. Published under license by AIP Publishing.