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...
| Authors: | , , , , , |
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| Format: | article |
| Publication Date: | 2017 |
| Country: | España |
| Institution: | Universidad de Castilla-La Mancha |
| Repository: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/15811 |
| Online Access: | http://dx.doi.org/10.1016/j.seppur.2017.10.009 http://hdl.handle.net/10578/15811 |
| Access Level: | Open access |
| Keyword: | Electrokinetic remediation Unsaturated soils Multiphysics simulation Soil flushing Numeical model |
| Summary: | 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. |
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