Abstract
The adsorption capacity of bentonite modified with carbon nanotubes (CNT) and fired at a temperature of 550 °C was studied. Adsorption isotherms of Cu2+ and Fe2+ ions by CNT-modified bentonite are plotted as functions of Ср concentrations under static conditions. It is shown that the bentonite fraction with a granule size of 0.10…0.99 mm has the highest adsorption efficiency. Studies of the process of adsorption of Cu2+ ions on CNT-modified bentonite showed that it is described by the Freundlich isotherm, while the process of adsorption of Fe2+ ions on the same bentonite can be represented in terms of the Langmuir isotherm. An improved local wastewater treatment plant for a textile enterprise is proposed, which, as one of the main elements, includes an adsorption filter loaded with CNT-modified bentonite. The effectiveness of wastewater treatment of a textile enterprise has been confirmed by production tests.
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