Artículo
Modeling the influence of MgSO4 invariant points on multiphase reactive transport process during saline soil evaporation
Fecha de publicación:
01/2013
Editorial:
Elsevier
Revista:
Physics and Chemistry of the Earth
ISSN:
1474-7065
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
In the present work, we modeled a laboratory experiment where a sand column saturated with a MgSO4 solution is subject to evaporation. We used a compositional formulation capable of representing the effect of geochemistry on flow and transport for concentrated solutions under extreme dry conditions. The model accounts for the water sink/sources terms due to hydrated mineral dissolution/precipitation and the occurrence of invariant points, which prescribe the water activity. Results show that the occurrence of the invariant points at the top of the domain could affect the vapor flux at the column top and salt precipitation along the column. In fact, the invariant points occurrence could explain the spatial fluctuation on the salt precipitates formation. Results also suggest that the complex hydrochemical interactions occurring during soil salinization, including osmotic effects, are crucial not only to understand the salt precipitation, but also the evaporation rate.
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Identificadores
Colecciones
Articulos(CCT - TANDIL)
Articulos de CTRO CIENTIFICO TECNOLOGICO CONICET - TANDIL
Articulos de CTRO CIENTIFICO TECNOLOGICO CONICET - TANDIL
Citación
Gamazo, P.; Saaltink, M. W.; Carrera, J.; Slooten, L. J.; Bea, Sergio Andrés; et al.; Modeling the influence of MgSO4 invariant points on multiphase reactive transport process during saline soil evaporation; Elsevier; Physics and Chemistry of the Earth; 64; 1-2013; 57-64
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