Home – Home – Jornals – Chemistry for Sustainable Development 2020 number 6

Phenol adsorption from aqueous solutions on carbon sorbents was studied. The carbon sorbents were prepared from Kuzbass coals by means of chemical activation of raw coals using potassium hydroxide. Coal and potassium hydroxide were mixed by means of impregnation (with a mass ratio of coal/alkali 1 : 1), followed by mixture carbonization at 800 °C with isothermal exposure for 1 h. Phenol adsorption on thus prepared sorbents was shown to be described by Langmuir equation ( R ² ≈ 0.999). Sorption parameters point to the high efficiency of phenol adsorption on carbon sorbents, especially on the sorbent obtained from D coal. It was established that phenol adsorption from aqueous solutions by the sorbents is described by the pseudo-second-order adsorption kinetics model, and the limiting stage is the diffusion of phenol molecules in the microporous space of the sorbent.