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Hydrolysis and Condensation Reactions of Methacrylate-Modified Aluminum Alkoxides
Hydrolysis Condensation Reactions Methacrylate-Modified Aluminum Alkoxides
2010/8/19
The hydrolysis of aluminum tri-sec-butoxide and compounds obtained by substituting the larger functional groups for the present alkly groups in Al(O-sec-Bu)3, and the reaction of these products with a...
In Situ Infrared Speciation of Adsorbed Carbonate on Aluminum and Iron Oxides
Attenuated Total Reflectance-Fourier Transform Infrared Carbonate Adsorption Electrophoretic Mobility Infrared Point of Zero Charge Point of Zero Net Proton Charge X-ray Diffraction
2011/12/22
Abstract: Surface adsorption mechanisms of dissolved inorganic carbon species on soil minerals are not well understood. Traditional infrared (IR) study of adsorbed species of inorganic carbon using ai...
An Aluminum Pillared Montmorillonite with Fast Uptake of Strontium and Cesium from Aqueous Solutions
Cation Exchange Capacity Delamination Pillared Clay Radiocesium Radiostrontium Uptake
2011/12/22
Abstract: The uptake of Sr and Cs by 2 types of aluminum pillared layered clays (Al-PILC), a reference sample (AZA) and a specially tailored sample (FRAZA), were investigated. The AZA sample was prepa...
Effect of Time and Temperature on the Chemical Composition and Crystallization of Mixed Iron and Aluminum Species
Aluminum Crystallization Gibbsite Iron
2011/12/1
Abstract: We studied the influence of time ageing (up to 120 d at 50°C or 30d at 95°C) on the mineralogical and chemical composition of hydrolytic species of mixed aluminum and iron samples formed at ...
Formation of Aluminum Hydroxides as Influenced by Aluminum Salts and Bases
Aluminum hydroxides Pseudoboehmite Sulfates
2011/12/1
Abstract: The influence of different ions in the formation of Al(OH)3 polymorphs has been studied experimentally by promoting stoichiometric reactions between the aluminum salts (AlCl3, Al(NO3)3, Al2(...
The Center Shift in Mössbauer Spectra of Maghemite and Aluminum Maghemites
Al-Maghemite Center shift Maghemite Mossbauer effect
2011/12/29
Synthetic, relatively well-crystallized aluminum-substituted maghemite samples, γ-(Aly·Fe1−y)2O3, with y = 0, 0.032, 0.058, 0.084, 0.106 and 0.151 have been studied by X-ray diffraction and zero...
Effect of the Presence of Aluminum ions in Iron Solutions on the Formation of Iron Oxyhydroxides (FeOOH) at Room Temperature Under Acidic Environment
Akaganeite Aluminum Hydroxy-aluminum ions Iron hydrolysis Transmission electron microscopy X-ray diffraction
2011/12/29
The hydrolytic behavior of Fe solutions at room temperature under acidic conditions was investigated. In the presence of Al ions, with Cl and NO3 as associated anions, the Fe hydrolysis began almost i...
27Al MAS NMR and Aluminum X-ray Absorption Near Edge Structure Study of Imogolite and Allophanes
Allophane Aluminum Imogolite NMR XANES
2011/12/29
This paper compares the results of 27Al nuclear magnetic resonance spectroscopy (NMR) and Al-K-edge X-ray Absorption Near Edge Structure (XANES) of natural imogolite and allophanes and some crystallin...
Formation Mechanism of Aluminum Hydroxide Polymorphs
Al(OH)3 polymorphs Bayerite Gibbsite Noncrystalline materials Nordstrandite Pseudoboehmite
2011/12/30
Substantial studies have been carried out to investigate the mechanism of the formation of Al(OH)3 polymorphs. The influence of the nature of Al precipitation products on the formation of Al(OH)3 poly...
Effect of Prolonged Aging on the Transformation of Short-Range Ordered Aluminum Precipitation Products Formed in the Presence of Organic and Inorganic Ligands
Aging Gibbsite Montmorillonite Noncrystalline Al products Pseudoboehmite
2011/12/29
More than 40 samples of Al precipitation products formed in the presence of organic (aspartic, oxalic, citric, tartaric, malic, salicylic, and tannic acid, and acetylacetone) and inorganic (chloride, ...
Adsorption of Water Vapor by Soils: Investigations of the Influence of Organic Matter, Iron, and Aluminum on Energetic Heterogeneity of Soil Clays
Soil constituents Surface heterogeneity Water adsorption
2011/12/29
Water vapor adsorption isotherms were measured for samples of loessial soil clays modified by removing organic matter and Fe and Al compounds. The isotherms were analyzed by the exponential adsorption...
THE COORDINATION OF ALUMINUM IONS IN THE PALYGORSKITE STRUCTURE
Al-coordination MAS-NMR Palygorskite
2011/11/4
Abstract--NMR spectra ofPF1 - 1 Floridan palygorskite strongly suggest that AI 3§ occurs only in octahedral coordination. X-ray microanalysis of the palygorskite fibers indicate a chemical composition...
Effect of Tartaric Acid and pH on the Nature and Physicochemical Properties of Short-range Ordered Aluminum Precipitation Products
Aggregation Aluminum hydroxides Crystallization Porosity Precipitation Surface area Tartaric acid
2011/12/31
The influence of tartaric acid and pH on chemical composition, morphology, surface area, and porosity of short-range ordered Al precipitation products was studied. Samples were prepared (1) at pH 8.0 ...
The Coordination of Aluminum Ions in the Palygorskite Structure
Al-coordination MAS-NMR Palygorskite
2011/12/31
NMR spectra of PF1-1 Floridan palygorskite strongly suggest that Al3+ occurs only in octahedral coordination. X-ray microanalysis of the palygorskite fibers indicate a chemical composition defined by ...
The Influence of Aluminum on Iron Oxides. Part XVI: Hydroxyl and Aluminum Substitution in Synthetic Hematites
Al substitution Cell-edge lengths Hematite LOI OH substitution X-ray intensity
2011/12/31
Synthetic hematites with Al substitutions between 0 and 18 mol % were synthesized at different temperatures and water activities. The cell-edge lengths a for different synthesis conditions decreased l...