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Photochemical Dissolution of Goethite in Acid/Oxalate Solution
Goethite Iron Lepidocrocite Photochemical dissolution Oxalate
2012/1/11
During photochemical dissolution of goethite in acid/oxalate solution, Fe3+, Fe2+, and CO2 were released and towards the end of the reaction ferrous oxalate precipitated. The dissolution process invol...
Effects of Reduction and Reoxidation of Structural Iron on the Surface Charge and Dissolution of Dioctahedral Smectites
Dissolution Iron Nontronite Oxidation Reduction Smectite Surface area
2012/2/6
The effect of Fe oxidation state on the surface charge (CEC) and solubility of smectites were studied using the <2-祄, Na+-saturated fraction of an Upton, Wyoming; a Czechoslovakian; and a New Zealand ...
Effect of Selective Dissolution on Charge and Surface Properties of an Acid Soil Clay
Anion exchange Cation exchange Electrophoresis Inceptisol Soil clay Surface charge Zeta potential
2012/2/6
To evaluate the importance of oxides to the surface chemistry of acid mineral soils, clay fractions were separated from a surface and subsurface horizon of an Inceptisol representative of many of the ...
Kinetics of Glass Dissolution and Zeolite Formation Under Hydrothermal Conditions
Clinoptilolite Dissolution Kinetics Mordenite Phillipsite Synthesis Volcanic glass Zeolite
2012/2/8
After a temperature-dependent period when little dissolution occurs, the dissolution of rhyolitic glass can be described by dC/dt = k(Cs − C), where Cs is the concentration of dissolved silica a...
Dissolution of Iron Oxides and Oxyhydroxides in Hydrochloric and Perchloric Acids
Acid Akaganeite Dissolution Goethite Hematite Iron oxide Lepidocrocite Maghemite Magnetite
2012/2/8
The dissolution of synthetic magnetite, maghemite, hematite, goethite, lepidocrocite, and akaganeite was faster in HCl than in HClO4. In the presence of H+, the Cl− ion increased the dissolution...
Dissolution Kinetics of Phlogopite. II. Open System Using an Ion-Exchange Resin
Dissolution Ion-exchange resin Kinetics Open system Mica Phlogopite
2012/2/8
The rate of dissolution of phlogopite in an open system was measured at low temperature and pressure and at pH 3–5. The maximum dissolution rate was achieved by maintaining extremely low ionic concent...
Dissolution Kinetics of Phlogopite. I. Closed System
Closed system Dissolution Kinetics Mica Phlogopite
2012/2/8
Dry ground phlogopite was placed in deionized water saturated with CO2 at room temperature and pressure. The bulk solution was buffered between a pH of 5 and 6 which is close to the pH of natural weat...
Determination of Noncrystalline Soil Components by Weight Difference after Selective Dissolution
Allophane Noncrystalline Quantification Selective dissolution Soil Weight loss
2011/11/22
Abstract: A procedure based on loss of weight after selective dissolution analysis (SDA) and washing with (NH4)2CO3 was developed for estimating the noncrystalline material content of soils derived fr...
Dissolution of Smectites in Hydrochloric Acid: II. Dissolution Rate as a Function of Crystallochemical Composition
Crystallochemical Dissolution Hydrochloric Nontronite Smectite
2012/2/10
A correlation was made of crystallochemical data from 15 smectites with the half time of dissolution (t05) in 6 N hydrochloric acid at 96°C. From this the relation ln t05 = 3.95 − 1.96 FeVI W...
Extrapolation of Aqueous Dissolution Data to Determine Comparative Free Energies of Formation (CΔGfo), and Relative Mineral Stabilities
Dissolution Energy Formation Mineral Solubility Stability
2012/2/10
Analytical data from aqueous dissolution studies of minerals, mineral systems, and naturally equilibrated solutions such as surface waters and groundwaters provide the basic ingredients necessary to c...
Dissolution of Two Australian Palygorskites in Dilute Acid
Dissolution Two Australian Palygorskites Dilute Acid
2012/2/13
The dissolution of two relatively pure Australian palygorskites in mild acid was studied. For both palygorskites, Si and Mg releases were linear with respect to added acid. The rate of Si release with...
Geochemical Mechanics for the Dissolution, Transport, and Deposition of Aluminum in the Zone of Weathering
Geochemical Mechanics Dissolution Aluminum
2012/2/15
Organic acids in the 0·01M concentration range representing amino-, aliphatic, and aromatic types present in humus dissolve 70–85 ppm Al from Arkansas bauxite at room temperature, whereas 0·03 ppm is ...
Kinetics of Acid-Dissolution of Palygorskite (Attapulgite) and Sepiolite
Kinetics Acid-Dissolution Palygorskite Attapulgite Sepiolite
2012/2/20
Palygorskite and sepiolite were digested with large excesses of hydrochloric acid at constant temperature for various periods of time. The reaction was found to be of first order with respect to the m...
KINETICS OF ACID-DISSOLUTION OF PALYGORSKITE (ATTAPULGITE) AND SEPIOLITE
PALYGORSKITE ATTAPULGITE SEPIOLITE
2011/11/4
Palygorskite and sepiolite were digested with large excesses of hydrochloric acid at constant temperature for various periods of time. The reaction was found to be of first order with respect to the m...