Adsorption of methylene blue and malachite green on micro-mesoporous carbon materials

The aim of this work was to investigate the determination of adsorption kinetics and adsorption isotherms for methylene blue (MB) and malachite green (MG) from aqueous solutions, on micro-mesoporous carbon materials, C–HA, C–HA–CO2, C–CA and C–CA–CO2, obtained by soft-templating method. In most cases, the adsorption kinetics proceeded in compliance with pseudo II-order reaction model, only in one case with pseudo I-order reaction model: C–CA (MG). Adsorption, in equilibrium conditions, was described by Langmuir and Freundlich equations. In five cases, the adsorption proceeded in compliance with the Langmuir model: C–HA (MB, MG), C–HA–CO2 (MB, MG), C–CA–CO2 (MB); in three cases, the adsorption was described using Freundlich equation: C–CA (MG, MB), C–CA–CO2 (MG).

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