The Effect of Oxidation of Humic Acids on the Adsorption of Cd (II), Cu (II), Pb (II) and Zn (II) by a Humate-containing Hybrid Adsorbent
Boris S. Smolyakov
Nikolaev Institute of Inorganic Chemistry, Russian Academy of Sciences, Siberian Branch, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia.
Alexey K. Sagidullin *
Nikolaev Institute of Inorganic Chemistry, Russian Academy of Sciences, Siberian Branch, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia.
*Author to whom correspondence should be addressed.
Abstract
Humic acids of natural origin were oxidised with hydrogen peroxide and Fenton’s reagent to produce hybrid adsorbents based on mesoporous carbon. The characteristics of the modified humic acids and hybrid adsorbents were studied. Oxidation of humic acids provides an increase in adsorption of Cd (II), Cu (II), Pb (II) and Zn (II) by hybrid adsorbents. The values of adsorption capacity increase with increasing pH and vary in the order Cu> Pb> Zn> Cd.
Keywords: Adsorption, heavy metals, humic acids, hybrid adsorbent, oxidation