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Publisher: Altai State University
Journal: Khimiia rastitel'nogo syr'ia (Chemistry of plant raw material)
Languages: Russian
Types: Article
Subjects: rice hull; amorphous silica; sorption; acid hydrolysis, рисовая шелуха, аморфный кремнезем, сорбция
The samples silicone dioxide containing 95−99,9% of the basic substance depending on conditions of the raw materials preparation and the temperature of treatment were obtained from rice hull by the oxidation burring method. Their phase composition and morphology were studied. The samples have amorphous and crystal state. Their specific surface and pore size distribution were determined by nitrogen adsorption. The specific surface value varied in the range of 6−230 m2/g and the pore diameters – in the range of 4,4−129,9 nm.All the samples were investigated as sorbent for extraction Cu (II) and Mn (II) ions from modelling solutions. The sample efficient to these ions were found. The oxidation degree of the sorbed ions on silicon dioxide surface was determined by X-ray photoelectron spectroscopy method.
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