Flow and transport through clay membrane barriers

Flux equations for liquid and solute migration through clay barriers that behave as semi-permeable membranes used in waste containment and remediation applications, known as clay membrane barriers (CMBs), are discussed. The results of a simplified analysis of flow through a geosynthetic clay liner (GCL) using measured values for the chemico-osmotic efficiency coefficient (ω) of the GCL indicate a total liquid flux that counters the outward Darcy (hydraulic) flux due to chemico-osmosis associated with clay membrane behavior of the GCL. Also, the solute (contaminant) flux through the GCL is reduced relative to the solute flux that would occur in the absence of membrane behavior due to chemico-osmotic counter advection and solute restriction. Since diffusion commonly controls solute transport through GCLs and other low-permeability clay barriers, the implicit (empirical) correlation between ω and the effective salt-diffusion coefficient of the migrating contaminant is an important consideration with respect to contaminant restriction in CMBs.

[1]  Craig H. Benson,et al.  Foundry Green Sands as Hydraulic Barriers: Field Study , 2002 .

[2]  Hydraulic Barriers in Soil and Rock , 1985 .

[3]  Michael A. Malusis,et al.  Theory for reactive solute transport through clay membrane barriers. , 2002, Journal of contaminant hydrology.

[4]  Jacques Lavoie,et al.  Design, construction, performance, and repair of the soil–bentonite liners of two lagoons , 1992 .

[5]  Charles D. Shackelford,et al.  Permeation of sand-processed clay mixtures with calcium chloride solutions , 1998 .

[6]  H. W. Olsen,et al.  A Laboratory Apparatus to Measure Chemico-Osmotic Efficiency Coefficients for Clay Soils , 2001 .

[7]  J. Loch,et al.  Chemical osmosis in compacted clayey material and the prediction of water transport , 1999 .

[8]  D. O'sadnick,et al.  Evaluation and Performance of a Sand/Bentonite Liner , 1995 .

[9]  T. Coplen,et al.  Ultrafiltration by a compacted clay membrane—II. Sodium ion exclusion at various ionic strengths☆☆☆ , 1973 .

[10]  A. J. Staverman.  Non-equilibrium thermodynamics of membrane processes , 1952 .

[11]  David E. Daniel,et al.  Diffusion in Saturated Soil. I: Background , 1991 .

[12]  J. K. Mitchell,et al.  Coupled salt and water flows in a groundwater basin , 1973 .

[13]  James K. Mitchell,et al.  Fundamentals of soil behavior , 1976 .

[14]  S. Barbour,et al.  Osmotic Flow and Volume Change in Clay Soils , 1986 .

[15]  D. J. Dappolonia.  Soil-Bentonite Slurry Trench Cutoffs , 1980 .

[16]  Peter Grathwohl,et al.  Diffusion in Natural Porous Media: Contaminant Transport, Sorption/Desorption and Dissolution Kinetics , 1998 .

[17]  M. I C H A.  Coupling Effects during Steady-State Solute Diffusion through a Semipermeable Clay Membrane , 2002 .

[18]  J. Vinograd,et al.  Diffusion of Electrolytes and of the Ions in their Mixtures , 1941 .

[19]  R. Yong,et al.  Geoenvironmental engineering : contaminated ground : fate of pollutants and remediation , 1997 .

[20]  Charles D. Shackelford,et al.  DIFFUSION OF CONTAMINANTS THROUGH WASTE CONTAINMENT BARRIERS , 1989 .

[21]  H. W. Olsen.  Simultaneous Fluxes of Liquid and Charge in Saturated Kaolinite 1 , 1969 .

[22]  A. Yeung.  Coupled Flow Equations for Water, Electricity and Ionic Contaminants through Clayey Soils under Hydraulic, Electrical and Chemical Gradients , 1990 .

[23]  W. D. Kemper,et al.  Osmotic Efficiency Coefficients Across Compacted Clays 1 , 1966 .

[24]  David E. Daniel,et al.  Hydraulic conductivity and waste contaminant transport in soil , 1994 .

[25]  Richard D. Woods,et al.  Geotechnical Practice for Waste Disposal '87 , 1987 .

[26]  A. Katchalsky,et al.  Nonequilibrium Thermodynamics in Biophysics , 1965 .

[27]  Ah Gipson.  Permeability Testing on Clayey Soil and Silty Sand-Bentonite Mixture Using Acid Liquor , 1985 .

[28]  S. Day.  The Compatibility of Slurry Cutoff Wall Materials with Contaminated Groundwater , 1994 .

[29]  Christopher R. Ryan,et al.  Vertical Barriers in Soil for Pollution Containment , 1987 .

[30]  James K. Mitchell,et al.  Coupled fluid, electrical and chemical flows in soil , 1993 .

[31]  David E. Daniel,et al.  Calcium and sodium bentonite for hydraulic containment applications , 1997 .

[32]  Craig H. Benson,et al.  Evaluating the hydraulic conductivity of GCLs permeated with non-standard liquids , 2000 .

[33]  Craig H. Benson,et al.  HYDRAULIC CONDUCTIVITY AND SWELLING OF NONPREHYDRATED GCLS PERMEATED WITH SINGLE-SPECIES SALT SOLUTIONS , 2001 .

[34]  S. J. Fritz.  Ideality of Clay Membranes in Osmotic Processes: A Review , 1986 .

[35]  Michael A. Malusis,et al.  Chemico-osmotic efficiency of a geosynthetic clay liner , 2002 .

[36]  S. Jefferis,et al.  Geoenvironmental Engineering For In Situ Remediation , 2000 .

[37]  Alan J. Rabideau,et al.  Boundary conditions for modeling transport in vertical barriers , 1998 .

[38]  H. W. Olsen,et al.  CHEMICO-OSMOSIS VERSUS DIFFUSION-OSMOSIS , 1990 .

[39]  Harold W. Olsen,et al.  Liquid Movement Through Kaolinite under Hydraulic, Electric, and Osmotic Gradients , 1972 .