Studium kinetiky biosorpce Cr(VI) na slupkách citrusových plodů a vlivu Cr(III) na stanovení Cr(VI)

Abstract

This thesis studies the kinetics of biosorption of hexavalent chromium using waste citrus peel, as well as the influence of trivalent chromium on own determination of hexavalent chromium after the biosorption. The theoretical part describes the possible occurrence and negative impact of hexavalent chromium on the environment; methods of its removal; general mechanism of biosorption of Cr(VI) as well as the factors that may affect this process. In the practical part of this thesis there are presented the methodical procedures of modification of studied biosorbent and the methodology of adsorption kinetics’ modeling. The samples were activated with hydrochloric acid in different concentrations, namely from 0.01 to 1.0 mol/l. In the practical part there was also verified the influence of Cr(III) on the determination of Cr(VI), which was determined by the spectrophotometric method with 1,5-diphenylcarbazide.