Abstract
Carbon-mineral materials were obtained by mixing of clay mineral (montmorillonite) with aqueous solutions of cationic dye “methylene blue” and anionic dye “direct clean-blue” (a component of wastewater of dyeing enterprises) and subsequent drying and carbonization in an atmosphere of water vapor. It is shown that the specific surface area of the synthesized carbon materials depends on the nature of the modifying organic compound, its content in the sample and the influence of ultrasound. It is found that the preliminary activation of the initial clay increases the surface area, but does not have a significant effect on the adsorption of phenol, compared with materials obtained without activation. Hydrophobic surface properties of materials are confirmed by the results of studies on the adsorption of phenol from aqueous solutions. Adsorption capacity of obtained carbon-mineral materials with respect to phenol is 4-8.5 mg · g−1, which is 15-30 times higher than that of the original clay. Synthesized sorbents are comparable to the adsorption capacity with respect to phenol with carbon material obtained by direct pyrolysis.
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