Behavior of kaolinite and illite-based clays as landfill barriers

Cuevas, Jaime; Leguey, Santiago; Garralón, A.; Rastrero, Manuel Rodríguez; Procopio, Jesús R.; Sevilla, Ma Teresa; Jiménez, Nicanor Sánchez; Abad, Rafael Rodríguez; Garrido, Adrián

doi:10.1016/j.clay.2008.06.017

Cited by 24 publications

(27 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Shale is composed by clay minerals that usually display the lowest permeability because of their small particle size and complex porous structure (Cuevas, 2009). Their high specific surface area allows strong physical and chemical interactions with fluids and dissolved species which are subjected to electrostatic repulsion, sorption or specific cation exchange reactions.…”

Section: Gas In Place Quantificationmentioning

confidence: 99%

Assessment of Unconventional Shale Reservoir: The Fegaguira Fm, Chotts Basin, Tunisia

Rezouga¹,

Mohamed²,

Saidi³

et al. 2012

All Days

View full text Add to dashboard Cite

Geochemical data indicate that the Late Silurian-Early Devonian Fegaguira Formation is the main source rock that has been charged the Ordovician and the Triassic reservoirs in the Chotts basin, South of Tunisia. Its good to excellent geochemical characteristic and its convenient maturity range allow it to be nominated as a good shale reservoir.The reservoir assessment was based essentially on geochemical and mineralogical elements including: (1) source-rock distribution, thickness, organic richness, maturity level, petroleum generation and migration; (2) organic facies distribution, quality and kerogen transformation; and (3) mineralogical assessment, clay type and quartz richness. A geochemical database consisting of 224 cuttings samples of the Fegaguira Formation was used to determine its geochemical characteristics including mineralogy. The examined shales show different thickness distribution that decreases towards the south east. They were subdivided into three distinct units according to their diagraphic responses, lithology and organic richness. The two upper units exhibit good total organic carbon averaging 5%, an original hydrogen index averaging 560 mg HC/g of TOC suggesting that the Fegaguira Formation was originally rich in type II organic matter (oil and gas prone kerogen), maturity ranges from 0.7 to 1.1 % R 0 , transformation ratio is about 0.78% and quartz richness up to 16%. Detailed framework studies in petroleum geochemistry, lithostratigraphy and mineralogy combined with conventional modeling were used to estimate the unconventional oil and gas resources of the Fegaguira Formation. The important organic content, the carbon transformation ratio, the gas derived both from kerogen cracking and oil-to-gas cracking, including the calculated porosity and the quartz percentage suggest that the Feguiguira Formation is a promising reservoir.

show abstract

Section: Gas In Place Quantificationmentioning

confidence: 99%

Assessment of Unconventional Shale Reservoir: The Fegaguira Fm, Chotts Basin, Tunisia

Rezouga¹,

Mohamed²,

Saidi³

et al. 2012

All Days

View full text Add to dashboard Cite

show abstract

“…The low permeability of aquitards coupled with high sorption capacity confers importance to them as protective barriers keeping drinking water aquifers safe from contamination [ Bear , ; Neuzil , ; Starr et al ., ; Sudicky et al ., ] or in isolating wastes disposed in the subsurface [ Desaulniers et al ., ; Hendry et al ., ; Starr et al ., ; Sudicky et al ., ]. Recent interest has also focused on aquifer‐aquitard solute exchange related to long‐term contaminant sequestration [ Cuevas et al ., ; Mazurek et al ., ; Sudicky et al ., ; Zhang et al ., ] and aquitards acting as contaminant sources during back diffusion to aquifers [ Chapman and Parker , ; Liu and Ball , ; Parker et al ., ; Tang and Aral , , ; Yang et al ., ].…”

Section: Introductionmentioning

confidence: 99%

Forward and back diffusion through argillaceous formations

Yang

Annable

Jawitz

2017

Water Resources Research

View full text Add to dashboard Cite

The exchange of solutes between aquifers and lower‐permeability argillaceous formations is of considerable interest for solute and contaminant fate and transport. We present a synthesis of analytical solutions for solute diffusion between aquifers and single aquitard systems, validated in well‐controlled experiments, and applied to several data sets from laboratory and field‐scale problems with diffusion time and length scales ranging from 10−2 to 108 years and 10−2 to 102 m. One‐dimensional diffusion models were applied using the method of images to consider the general cases of a finite aquitard bounded by two aquifers at the top and bottom, or a semiinfinite aquitard bounded by an aquifer. The simpler semiinfinite equations are appropriate for all domains with dimensionless relative diffusion length, ZD < 0.7. At dimensionless length scales above this threshold, application of semiinfinite equations to aquitards of finite thickness leads to increasing errors and solutions based on the method of images are required. Measured resident solute concentration profiles in aquitards and flux‐averaged solute concentrations in surrounding aquifers were accurately modeled by appropriately accounting for generalized dynamic aquifer‐aquitard boundary conditions, including concentration gradient reversals. Dimensionless diffusion length scales were used to illustrate the transferability of these relatively simple models to physical systems with dimensions that spanned 10 orders of magnitude. The results of this study offer guidance on the application of a simplified analytical approach to environmentally important layered problems with one or two diffusion interfaces.

show abstract

“…There are numerous reports regarding the adsorption of strontium on many kinds of clay minerals present in and around disposal sites such as montmorillonite (2-6, 10, 11, 14, 16, 19-21, 23, 25), illite (2,3,5,9,13,20,21,24), kaolinite (2-5, 7-9, 15-20, 24), attapulgite (3), calcite (7), magnezite (17), zeolites (18,25), and silica colloids (8,11,22).…”

Section: Introductionmentioning

confidence: 99%

Adsorption Kinetics and Equilibria of Strontium onto Kaolinite

Keçeli

2014

Separation Science and Technology

View full text Add to dashboard Cite

Adsorption of Sr 2+ onto kaolinite has been studied by means of a radiotracer technique using the 90 Sr isotope. Bangham's and McKay models have been applied to kinetic results in Sr 2+ concentrations between trace −0.1 mol.L −1 . The magnitudes of film and intra-particle diffusion coefficients are 10−10 and 10−14 m 2 ·s −1 , respectively. Concentration dependence of diffusion coefficients indicated that Sr 2+ ions are adsorbed on two different adsorption sites by an exothermic and spontaneous process. The Freundlich isotherm parameters and exchange equilibrium constants derived from selectivity coefficients indicate that Sr adsorption are depressed by competing cations in the order of Na + < Mg 2+ < Al 3+ .

show abstract

Behavior of kaolinite and illite-based clays as landfill barriers

Cited by 24 publications

References 21 publications

Assessment of Unconventional Shale Reservoir: The Fegaguira Fm, Chotts Basin, Tunisia

Assessment of Unconventional Shale Reservoir: The Fegaguira Fm, Chotts Basin, Tunisia

Forward and back diffusion through argillaceous formations

Adsorption Kinetics and Equilibria of Strontium onto Kaolinite

Contact Info

Product

Resources

About