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Analytical Solutions for Contaminant Diffusion in Double-layered Porous Media

Li, Y. and Cleall, Peter John 2010. Analytical Solutions for Contaminant Diffusion in Double-layered Porous Media. ASCE Journal of Geotechnical and Geoenvironmental Engineering 136 (11) , pp. 1542-1554. 10.1061/(ASCE)GT.1943-5606.0000365

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Abstract

Analytical solutions for conservative solute diffusion in one-dimensional double-layered porous media are presented in this paper. These solutions are applicable to various combinations of fixed solute concentration and zero-flux boundary conditions (BC) applied at each end of a finite one-dimensional domain and can consider arbitrary initial solute concentration distributions throughout the media. Several analytical solutions based on several initial and BCs are presented based on typical contaminant transport problems found in geoenvironmental engineering including (1) leachate diffusion in a compacted clay liner (CCL) and an underlying stratum; (2) contaminant removal from soil layers; and (3) contaminant diffusion in a capping layer and underlying contaminated sediments. The analytical solutions are verified against numerical solutions from a finite-element method based model. Problems related to leachate transport in a CCL and an underlying stratum of a landfill and contaminant transport through a capping layer over contaminated sediments are then investigated, and the suitable definition of the average degree of diffusion is considered.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords: Analytical techniques, Containment, Diffusion, Layered systems, Porous media
Additional Information: Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/1090-0241/ (accessed 25/02/2014)
Publisher: ASCE
ISSN: 1090-0241
Date of First Compliant Deposit: 30 March 2016
Last Modified: 04 Jun 2017 02:03
URI: http://orca.cf.ac.uk/id/eprint/8277

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