Research on the Mechanism and Kinetics of Oil-Product Adsorption from Industrial Wastewater by a Modified Hydrophobic Carbonate Sludge

Abstract

Features of dissolved oil-product adsorption from industrial wastewater by a modified hydrophobic carbonate sludge are studied. The adsorption isotherm is obtained. The adsorption mechanism on the new sorbent is investigated as physical unactivated adsorption using thermodynamic and kinetic parameters. The Gibbs free energy (–(20.26–21.46) kJ/mol), isosteric heat of adsorption (0.9–1.17 kJ/mol), adsorption rate constants ((0.2–0.47)·10^–3sec^–1), and apparent activation energy (6.6–28.6 kJ/mol) are calculated. Adsorption under dynamic conditions is studied.