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Effects of Exchangeable Cations on Hydraulic Conductivity of a Marine Clay
Consolidation Dispersion Exchangeable cation Hydraulic conductivity
2011/12/28
A laboratory study of the hydraulic conductivity (HC) of a marine clay with monovalent, divalent and trivalent cations revealed large differences in HC. The exchangeable cations employed in this study...
Morphology, Texture, and Microstructure of Halloysitic Soil Clays as Related to Weathering and Exchangeable Cation
Exchangeable cation Halloysite Interstratification Microstructure Smectite TEM
2011/12/31
This paper aims at characterizing the morphology, texture, and microstructure of three hydrated kaolin rich clays (f < 0.2 µm) from volcanic soils. These clays represent a weathering sequence in...
Use of Methylene Blue and Crystal Violet for Determination of Exchangeable Cations in Montmorillonite
Cation exchange capacity Crystal violet Exchangeable cations ICP Methylene blue Montmorillonite Organic cations
2012/1/4
A procedure for the determination of cation exchange capacity (CEC) and the amounts of exchangeable cations adsorbed to montmorillonite is proposed. The method consists of a single incubation of the c...
57Fe Mossbauer Spectroscopic Study of Structural Changes During Dehydration of Nontronite: Effect of Different Exchangeable Cations
Mossbauer Dehydration Nontronite Cation migration Tetrahedral site
2012/1/4
Dehydration-induced migration of different exchangeable cations toward the layers of nontronite has been studied by M鰏sbauer spectroscopy. As interlayer water is removed exchangeable cations migrate t...
The Effect of Heat Treatments on the Total Charge and Exchangeable Cations of Ca-, Na-, and Li-Saturated Kaolinite
Kaolinite Cation exchange capacity Water adsorption Lithium retention
2011/12/31
The effect of heat treatments on the total charge and water adsorption by Ca-, Na- and Li-saturated kaolinite was studied using extraction techniques and thermal gravimetric analysis, respectively. Me...
Influence of Exchangeable Cations on the Surface Free Energy of Kaolinite as Determined from Contact Angles
Contact angle Dispersion Kaolinite Surface free energy Wettability
2012/1/5
The influence of adsorbed H+, Na+, K+, Ca2+, Mg2+, Ba2+, and Al3+ ions on the wettability of a kaolinite surface was determined from contact angles, which were measured in kaolinite-water drop- air (s...
Effect of Exchangeable Potassium on the Hydraulic Conductivity of Smectite-Sand Mixtures
Hydraulic conductivity Potassium Salinity Sand Smectite Swelling
2012/1/11
Changes in hydraulic conductivity of smectite-sand mixtures (using four reference smectites) as a function of the concentration (0.01, 0.003, 0.002, 0.001 M Cl- and distilled water) and potassium adso...
Relationship Between Exchangeable and Total Magnesium in Pennsylvania Soils
Cation exchange Chlorite Illite Magnesium Smectite Soil Vermiculite
2012/2/2
The particle size distribution, total and exchangeable Mg, and mineralogical compositions were determined on eight well-drained, noncultivated subsoils from Pennsylvania. No correlation was found betw...
Effects of Exchangeable Cation Composition on the Thermal Expansion/Contraction of Clinoptilolite
Clinoptilolite Dehydration Exchangeable cation Thermal expansion X-ray powder diffraction Zeolite
2012/2/6
To understand and predict the effects of a thermal pulse induced by a radioactive waste repository on clinoptilolite-bearing rocks, the lattice parameters of 6 natural and 3 cation-exchanged (Ca, K, N...
Influence of Exchangeable Cation Composition on the Size and Shape of Montmorillonite Particles in Dilute Suspension
Exchange cations Light transmission Montmorillonite Particle size Tactoid Viscosity
2011/11/23
Abstract: Viscosity and light-transmission measurements of dilute suspensions of montmorillonites having different exchangeable cations were used to calculate relative particle sizes as a function of ...
Effect of Exchangeable Ions and Ionic Strength on Boron Adsorption by Montmorillonite and Illite
Adsorption Boron Cation exchange Illite Ionic strength Montmorillonite
2012/2/7
The effects of exchangeable Na and Ca and the ionic strength of NaCl and CaCl2 solutions on the boron adsorption by the Na and Ca forms of montmorillonite and illite at pH 9 were studied. The boron ad...
Hydrolysis and Dehydration Reactions of Exchangeable Cu2+ on Hectorite
Copper Dehydration Electron spin resonance Hectorite Hydrolysis Water
2012/2/7
Electron spin resonance (ESR) analysis of Cu2+-hectorite suspensions provides evidence for the surface-induced hydrolysis of Cu(H2O)62+ at low pH and surface-inhibited hydrolysis (or precipitation) at...
Acetamide and Polyacrylamide Adsorption onto Clays: Influence of the Exchangeable Cation and the Salinity of the Medium
Acetamide Adsorption Montmorillonite Polyacrylamide Saline Media
2012/2/10
The adsorption of acetamide and partly hydrolyzed polyacrylamides onto montmorillonite has been investigated with emphasis on the valency of the exchangeable cation of the clay and the ionic strength ...
Exchangeable Cation—Structural Parameter Relationships in Montmorillonite
Structural Parameter Relationships Montmorillonite Exchangeable Cation
2012/2/15
The interaction between “unhydrated” cations (those not separated from the surface by a solvent sheath) in hole positions and the montmorillonite surface was analyzed theoretically by considering the ...
Exchangeable Cation Distribution in Nickel- and Magnesium- Vermiculites
Exchangeable Cation Distribution Magnesium- Vermiculites
2012/2/15
Abnormal scatterings of X-rays take place between Bragg spots. Their study in hydrated Mg- and Ni-vermiculites shows that they appear in reciprocal space in the form of modulated lines, elongated alon...