摘要：

The heterogeneity of activated carbons (ACs) prepared from different precursors is investigated on the basis of adsorption isotherms of phenol and 2,3,4-trichlorophenol from dilute aqueous solutions at various pH values. The Langmuir-Freundlich equation as well as the Dubinin-Astakhov one have been used to estimate the parameters characterizing adsorption from aqueous phenol solutions on heterogeneous carbon surfaces. Adsorptionenergy distribution (AED) functions have been calculated by using an algorithm based on a regularization method. Analysis of these functions for activated carbons provides significant comparative information about their heterogeneity. Besides, literature data on enthalpy values for the transfer of phenol from a solution to surfaces of ACs confirm the correctness of the adsorption energies obtained in our study. The AED functions for phenol on activated carbons, generated by a utilization of the regularization method have been verified. As a verification tool, the Grand Canonical Monte Carlo simulation method carried out on a square lattice has been chosen.

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