Results 161 to 170 of about 5,084 (220)
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Chromium (VI) adsorption on boehmite
Journal of Hazardous Materials, 2009Boehmite was synthesized and characterized in order to study the adsorption behavior and the removal of Cr(VI) ions from aqueous solutions as a function of contact time, initial pH solution, amount of adsorbent and initial metal ion concentration, using batch technique.
Jaime Jiménez Becerril +1 more
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Towards ambient pressure leaching of boehmite through mechanical activation
Hydrometallurgy, 2014 This paper explores the possibility of manoeuvring the reactivity of boehmite through mechanical activation (MA) for enhancing the solid/liquid reaction between boehmite and NaOH.
Rakesh Kumar
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Mechanisms of chromate adsorption on boehmite
Journal of Hazardous Materials, 2015Adsorption reactions play an important role in the transport behavior of groundwater contaminants. Molecular-scale information is needed to elucidate the mechanisms by which ions coordinate to soil mineral surfaces. In this study, we characterized the mechanisms of chromate adsorption on boehmite (γ-AlOOH) using a combination of extended X-ray ...
Chad P, Johnston, Maria, Chrysochoou
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The Crystal Structure of Boehmite
Clays and Clay Minerals, 1979AbstractThe crystal structure of a synthetic boehmite sample has been refined to an R of 0.047 in the space group Amam from X-ray powder diffraction data. Inclusion of hydrogen atoms and/or refinement in the space group A21am gave poorer results. Cell dimensions were determined as a = 3.6936 (± 0.0003), b = 12.214 (± 0.001), c = 2.8679 (± 0.0003) Å ...
Gary G. Christoph +3 more
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Heat capacity and thermodynamic functions of boehmite (AlOOH) and silica-doped boehmite
The Journal of Chemical Thermodynamics, 2018Abstract Alumina has a variety of technological uses and has been utilized in many fields due to its versatility and abundance. The properties of aluminas, such as pore size, acid site concentration, and the amount of adsorbed water, can be tailored for a specific application using a variety of synthetic techniques.
Jason J. Calvin +4 more
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Properties of boehmite and Al2O3 thin films prepared from boehmite nanofibres
Journal of Materials Chemistry, 2011Transparent and nanoporous self-standing films consisting of oriented boehmite nanofibres were fabricated via the self-assembly of the fibres. The film-forming ability of boehmite nanofibres was closely related to their aspect ratio, and the fibres of 100 to 5000 in aspect ratio were favourable to fabricate the films.
Naofumi Nagai, Fujio Mizukami
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Clays and Clay Minerals, 1980
AbstractThirty two boehmites, synthesized at temperatures ranging from room temperature to 300°C, were examined by scanning electron microscopy, transmission electron microscopy, electron diffraction, X-ray powder diffraction, differential thermal analysis, and infrared spectroscopy.
Rodney Tettenhorst, Douglas A. Hofmann
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AbstractThirty two boehmites, synthesized at temperatures ranging from room temperature to 300°C, were examined by scanning electron microscopy, transmission electron microscopy, electron diffraction, X-ray powder diffraction, differential thermal analysis, and infrared spectroscopy.
Rodney Tettenhorst, Douglas A. Hofmann
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Formation of Fibrillar Boehmite
Journal of Porous Materials, 1999Fibrillar boehmite is a synthetic form of alumina where the morphology is in the form of fibrils instead of the normal corpuscular form. It is prepared from basic aluminium chloride. In this study a molar ratio of Cl−/Al2O3 of 1 was used. During the preparation the crystallinity of the product increases with time up to 48 h of crystallization.
B.S. Gevert, Zhong-Shu Ying
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Journal of Materials Chemistry, 2012
Boehmite nonwovens with hierarchical texture could be fabricated by a simple procedure consisting of mixing a boehmite nanofibre sol with an organic solvent and filtering the mixture. However, whether the nonwovens were obtained or not depended on the solvents.
Naofumi Nagai +8 more
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Boehmite nonwovens with hierarchical texture could be fabricated by a simple procedure consisting of mixing a boehmite nanofibre sol with an organic solvent and filtering the mixture. However, whether the nonwovens were obtained or not depended on the solvents.
Naofumi Nagai +8 more
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Hydrargillite → boehmite transformation
Inorganic Materials, 2010The hydrargillite → boehmite transformation has been studied at 200 and 250°C in water and water vapor. Samples have been characterized by X-ray diffraction, differential thermal analysis, thermogravimetry, IR spectroscopy, and transmission and scanning electron microscopy before and after autoclaving for various lengths of time.
G. P. Panasyuk +3 more
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