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Cation-Exchange Reactions of Siliceous and Aluminous Phillipsites
Cation exchange Cation selectivity Chemical composition Phillipsite Zeolite
2012/2/8
Exchange isotherms for the pairs Na-K and Na-Ca were measured by use of 0.1 N solutions at 5°, 35°, and 70°C in phillipsite from Tecopa, California (3.63 Al/32 oxygen unit cell), and Oki Islands, Shim...
Kaolins: Sources of Differences in Cation-Exchange Capacities and Cesium Retention
Cation-exchange capacity Cs retention Interlayer wedges Kaolinite Vermiculite
2012/2/9
Seven kaolins from Georgia (southeastern U.S.A.), ranging from high to low commercial grade, were characterized by X-ray powder diffraction and chemical techniques to establish that the variation in q...
Layer Charge-Cation-Exchange Capacity Relationships in Montmorillonite
Cation-exchange capacity Hectorite Hofmann-Klemen effect Layer charge Montmorillonite
2012/2/10
The charge density distribution among different classes of a series of reduced charge montmorillonites is heterogeneous as in the parent Camp Berteau clay. In addition, charge reduction proceeds inhom...
Determination of the Cation-Exchange Capacity (Layer Charge) of Small Quantities of Clay Minerals by Nephelometry
Exchange Microanalysis Nephelometry Smectite
2012/2/9
Nephelometric (light scattering) methods for the determination of Ca and Ba in the 0–30 ppm range, and their application to the estimation of the cation exchange capacity (±10%) of small (≤30 mg) samp...
Ideal Behavior in Na+-Trace Metal Cation Exchange on Camp Berteau Montmorillonite
Cation Exchange Heterovalent Exchange Montmorillonite Trace Metals
2012/2/9
The conditions under which an exchanger phase will behave as an ideal mixture are established from thermodynamic principles. It is shown that, if a stoichiometric cation-exchange reaction is reversibl...
Cation-Exchange Behavior of Clays and Synthetic Aluminosilica Gels
Amorphous Material Ca/Mg K//NH4 Methylene Blue Montmorillonite Vermiculite
2012/2/9
Cation-exchange capacities determined by methylene blue adsorption (CEC MB) and by the amount of K displaced from a K-saturated clay by NH4 (CEC K//NH4) correlate closely in five soil clays from Penns...
A Study on the Cation Exchange of [Co(NH3)6]3+ from H-Co (NH3)6-Vermiculite by Inorganic and Quaternary Ammonium Ions
[Co(NH3)6]3+ H-Co (NH3)6-Vermiculite Inorganic Quaternary Ammonium Ions
2012/2/15
The exchange of [Co(NH3)6] 3+ from its vermiculite complex has been carried out with a number of inorganic and alkyl quaternary ammonium ions of varying ionic sizes. The distribution and selectivity c...
A Kinetic Survey of the Cation Exchange and of the Oxidation of a Vermiculite
Kinetic Survey Oxidation Vermiculite Cation Exchange
2012/2/14
With the use of a BaCl 2 solution containing radioactive Ba2+ ions, kinetics of cation exchange have been done on a Kenya vermiculite, natural on one hand and previously oxidized either by 50°C water ...
‘Vermiculite’Determination on Whole Soils by Cation Exchange Capacity Methods
Vermiculite Whole Soils Cation Exchange Capacity
2012/2/15
The proposed method is a modification of one by Alexiades and Jackson (1965). Calcium exchange capacity (CaEC) and potassium exchange capacity (KEC) are determined, after removal of organic matter and...
Mineralogy and Cation Exchange Properties of Libby Vermiculite Separates as Affected by Particle-Size Reduction
Mineralogy Cation Exchange Properties Libby Vermiculite Particle-Size Reduction
2012/2/15
A vermiculite (Libby, Montana) sample obtained from the Zonolite company contained mostly coarse-grained separates with only 8? per cent clay. The 2?0 祄 fraction was used for particle-size reduction s...
Determination of the Cation Exchange Capacity of Clays and Soils Using an Ammonia Electrode
Clays and Soils Determination of the Cation Ammonia Electrode
2012/2/15
The ammonia electrode serves as the basis of a simple, accurate method for determination of cation exchange capacity of small (ca. 50 mg) samples of clays. The technique is also capable of accurate me...
The Effect of Cation Exchange of Tris(Ethylenediamine)Cobalt(III) for Sodium on Nitrogen Sorption by Montmorillonite
Tris(Ethylenediamine)Cobalt(III) Sodium Nitrogen Sorption Montmorillonite
2011/11/18
Abstract: The cation exchange process between tris(ethylenediamine)cobalt(III) and Na+ on montmorillonite was studied by atomic absorption spectrophotometry, X-ray diffraction, differential thermal an...
Acid Character of Sauconite: Increase in Cation Exchange Capacity on Aging in Water and the Role of Zn2+ and Al3+ Ions
Acid Character Sauconite Increase Cation Exchange Capacity Zn2+ Al3+
2012/2/20
pH- and conductometric titration curves of acid sauconite, freshly prepared by the action of H-resin on sauconite showed four segments, each, where H+, Al3+ and Zn2+ ions and a weak acid reacted with ...
Adsorption of Hydroxy-Al by Certain Phyllosilicates and its Relation to K/Ca Cation Exchange Selectivity
Adsorption Hydroxy-Al Certain Phyllosilicates K/Ca
2012/2/20
The adsorption of hydroxy-Al by the 2?? ?size fractions of muscovite, biotite, K-depleted micas, vermiculite and montmorillonite was studied. The differences in the amounts of hydroxy-Al adsorbed were...
Methylene Blue Absorption by Clay Minerals. Determination of Surface Areas and Cation Exchange Capacities (Clay-Organic Studies XVIII)
Methylene Blue Absorption Clay Minerals Cation Exchange Capacities
2012/2/20
Under appropriate conditions, both surface areas and cation exchange capacities of clay minerals can be measured by absorption of methylene blue from aqueous solutions. The method has been applied to ...