Effect of Sodium Sulphide Concentration on the Adsorption Kinetics and Photocatalytic Oxidation on Zinc Oxide
E. I. KAPINUS, S. V. KAMYSHAN and E. V. MANUYLOV
Institute for Sorption and Problems of Endoecology, National Academy of Sciences of Ukraine, Ul. Generala Naumova 13, Kyiv 03164 (Ukraine)
E-mail: eugenekapinus@yahoo.com
Keywords: sodium sulphide, zinc oxide, adsorption kinetics, photocatalytic oxidation kinetics
Pages: 93–98
Abstract
Adsorption and photocatalytic oxidation kinetics for sulphide ions on zinc oxide in aqueous solutions has been studied. It has been found that the rate constants of sodium sulphide adsorption and photocatalytic oxidation on zinc oxide decrease with increasing the substrate concentration, which indicates an auto-inhibition of these processes due to blocking the surface of zinc oxide by sodium sulphide.
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