Preparation method of attapulgite clay nanorod crystal composite microsphere adsorbent

Abstract

The invention relates to a preparation method for an attapulgite clay nanorod crystal composite microsphere adsorbent. According to the method, hydrochloric acid activated attapulgite clay nanorod crystals, concentrated ammonia liquor, ethyl orthosilicate, water and a solvent--absolute ethyl alcohol are reacted at a certain temperature, and through hydrolytic condensation and bonding of ethyl orthosilicate, a loose microsphere is formed by the attapulgite clay nanorod crystals. A loose microsphere composite material is formed by bonding each single attapulgite clay nanorod crystal with silica produced after hydrolytic condensation of ethyl orthosilicate, so the preparation method is simple; and the prepared microsphere composite material has good adsorption performance and has good application prospects in the field of sewage treatment.

Description

technical field

[0001] The invention relates to a preparation method of an attapulgite clay nanorod crystal composite microsphere adsorbent capable of rapid sedimentation, in particular to a method for forming loose microspheres by bonding attapulgite clay nanorod crystals to silicon dioxide by hydrolysis and condensation of ethyl orthosilicate Sorbent preparation method. Background technique

[0002] Attapulgite, also known as palygorskite, is a hydrous magnesium aluminum silicate mineral with a chain layer structure, and its ideal chemical formula is Si 8 o 20 Mg 5 (Al)(OH) 2 (H 2 O) 4 4H 2 O. Structural features make the attapulgite crystals in the form of fibers or needles, aggregated into straw bundles, and at the same time, the interior is filled with tunnel micropores consistent with the extension direction of the fibers, with a large specific surface area and internal surface area, showing a strong surface It has great application prospects in the field of wa...

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