Aluminum hydroxide is a compound with diverse crystalline structures, some of which demonstrate the ability to remove chemicals from aqueous solutions. In this research, aluminum hydroxide with the Bayerite structure was synthesized and used to remove Citric Acid (CA). This structure was not modified under the reaction conditions where CA ranged from 2 to 6 mg of CA in 20 mL of water, the t...

The structure–property relationship of catalytic supports for the deposition redox-active transition metals is great importance improving efficiency and reusability catalysts. In this work, role alumina support precursors Cu-Fe/Al2O3 catalysts used total oxidation toluene as a model volatile organic air pollutant elucidated. Surface characterization revealed that surface area, pore volume acid ...

With the rapid development of alumina industry and shortage bauxite, high-alumina coal fly ash (HACFA) has attracted more attention as a potential alternative resource. In order to extract from HACFA with newly developed technology, investigation crucial step, reaction between NH4Al(SO4)2·12H2O NH3·H2O, is necessary valuable. Thermodynamic analyses have shown that four kinds hydrate (boehmite, ...

The water-reactivity of AleGa and AleGaeIneSn alloys is investigated as a means to utilize the chemical potential energy of Al to split water for the production of H2. Al in bulk quantities of these alloys participates in a heterogeneous reaction with water to produce H2 and a-Al(OH)3 (bayerite). Low melting point phases in these alloys are believed to enable the observed reaction upon liquefac...

A novel and aqueous gel-casting process has been successfully developed to fabricate porous MgAl₂O₄ ceramics by using hydratable alumina and MgO powders as raw materials and deionized water as hydration agent. The effects of different amounts of deionized water on the hydration properties, apparent porosity, bulk density, microstructure, pore size distribution and compressive strength of the sa...

In nuclear research reactors, aluminium alloys are corroded and an hydroxide film covers their surface. Defects created by neutron irradiation can have a detrimental effect on this corrosion. study, two ion irradiations performed 6061-T6 alloy. The first experiment aims at studying the of metal matrix second displacement per atom is most 2.5 dpa in irradiated with Al ions 1.2 5 MeV 8 1.8 (calcu...

The Gardanne alumina plant (Marseille region, Southeast France) has disposed its residues as a slurry (red muds) in the Mediterranean Sea up to 2015 when new regulations allowed sole discharge of clarified effluent. This reduced quantity suspended material from ~300 g/L less than 10 mg/L. detailed chemical composition this effluent been determined by ICP-OES, ionic chromatography, 1H NMR spectr...

Aluminum Carbide (Al4C3) is a main source of corrosion problems in metal matrix composites as well refractory products. Hydrolysis to methane happening at room temperature leads various structural problems. As methods quantify Al4C3 are scarce, this paper proposes method measure containing analyte powders mg areas by combining robust autoclave system with non-dispersive infrared (NDIR) process ...

Here we addressed the question of whether burning guano produces a characteristic suite morphological changes and/or unique mineralogical products. The observed in our experimental (both fresh and decayed) included colour change (blackening), grain size (grain generally reduced, morphology rendered less distinct), alteration minerals by dehydration (e.g., gypsum to anhydrite, brushite whitlocki...