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Hard and Soft Acid-Base Model Applied to Bivalent Cation Selectivity on a 2:1 Clay Mineral
Bivalent Cations Covalent Bonding Electronegativity HSAB Montmorillonite Selectivity Coefficient Softness
2011/12/8
Abstract: We applied the hard and soft acid-base (HSAB) model (Xu and Harsh 1990a, 1990b) to bivalent cation exchange on a purified Ca-montmorillonite. As a result, a satisfactory model is proposed to...
Hydrophobic Nature of Organo-Clays as a Lewis Acid/Base Phenomenon
Organo-clay Surface tension Lewis acid/base
2011/12/31
The surface thermodynamic properties of a series of n-alkylammonium and quaternary ammonium treated clay films were determined by contact angle measurement of drops of test liquids using the Young equ...
Study of Some Physicochemical Properties of Pillared Montmorillonites: Acid-Base Potentiometric Titrations and Electrophoretic Measurements
Electrophoretic mobility Montmorillonite Pillared clays Potentiometric titration Surface charge
2012/1/4
The surface charges and the zeta potential of a Na-montmorillonite (Na-mont) and two pillared montmorillonite (MP1 and MP2) samples with different aluminum contents were determined by potentiometric t...
The Release of Aluminum from Aluminosilicate Minerals. II. Acid-Base Potentiometric Titrations
Aluminum Biotite Buffer Illite Kaolinite Mica Montmorillonite
2012/2/9
Acidified suspensions of Al-saturated kaolinite, montmorillonite, mica, illite, and biotite in 10−3 M NaNO3 were potentiometrically titrated with 0.1 N NaOH and 0.1 N HNO3 in succession in a CO2...
Acid-Base Interactions and the Properties of Kaolinite in Non-Aqueous Media
Acid-Base Interactions Kaolinite Non-Aqueous Media
2012/2/17
In non-aqueous systems, kaolinite can show, in addition to the physical interactions, considerable chemical activity. This study considers the chemical reactions that can occur at the kaolinite surfac...