Production of cellulose-containing sorption materials for wastewater treatment from heavy metal ions

Abstract

The results of the study of various methods of treatment of sawdust on their sorption properties are presented. It was found that treatment of the initial sorbent with hydrochloric acid solution, ultrahigh-frequency radiation and ultrasound leads to an increase in the sorption capacity of the material. It has been found that the process of zinc ions sorption from water by sawdust sorbents can be described by means of two dependences: the Freundlich adsorption equation (for the equilibrium range of metal ions 0,001– 0,02 mol/dm3) and the Langmuir monomolecular adsorption (0,02–0,04 mol/dm3). It was shown that the mechanisms of zinc ion binding by sawdust samples are ionic exchange involving carboxyl and hydroxyl groups as well as physical adsorption.