Water transport in electrokinetic remediation of unsaturated kaolinite. Experimental and numerical study
This work evaluated water transport that occurs in a partially saturated soil of low hydraulic permeability when undergoing an electrokinetic remediation process. The soil used was a compacted kaolinite. To evaluate a wide range of possible conditions, soil with three di?erent initial water contents...
| Autores: | , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Universidad de Castilla-La Mancha |
| Repositorio: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/15811 |
| Acceso en línea: | http://dx.doi.org/10.1016/j.seppur.2017.10.009 http://hdl.handle.net/10578/15811 |
| Access Level: | acceso abierto |
| Palabra clave: | Electrokinetic remediation Unsaturated soils Multiphysics simulation Soil flushing Numeical model |
| Sumario: | This work evaluated water transport that occurs in a partially saturated soil of low hydraulic permeability when undergoing an electrokinetic remediation process. The soil used was a compacted kaolinite. To evaluate a wide range of possible conditions, soil with three di?erent initial water contents (10, 15 and 20%) was used, obtaining a range of dry densities of 1300–1600 kg m-3. The tests were performed using a lab-scale setup with a soil capacity of 675 cm3 and applying di?erent electrical potential gradients (0.5, 1, 1.5 and 2 V cm-1). The experimental results obtained were used to validate a conceptual model implemented in COMSOL. The validated model was used to conduct a detailed interpretation of the observed water transport processes and to perform a study of the hydraulic behaviour of the soil as a function of the initial conditions of compaction, water saturation and applied electrical potential gradient. |
|---|