Kinetika adsorpce, rovnováha adsorpce a modelování odstranění mědi z vodného roztoku adsorpcí na mix šišek

Abstract

This thesis studies the processes of adsorption kinetics, the equilibrium and modeling removal of Cu(II) from aqueous solutions using a chemically modified cones of selected coniferous trees (Pinus sylvestris, Picea abies). In the theoretical part there are chapter dealing with the current state of issue, biosorption process, characteristic of biosorbents and description of copper. The experimental part describes the methodology of mechanical, chemical a thermal treatment of biosorbent, further modeling kinetics of sorption Cu(II), the study of optimum pH and the equilibrium sorption mechanism using adsorption isotherms, Langmuir and Freudlich model. The highest efficacy was observed at 0-0.5 mm fraction after activation 1.0 mol.l-1 NaOH. Best removal of this faction was held for 20 min. In this time, the efficiency of 88 % (q = 4.4 mg.g-1). To 100% removal efficiency was pH 5.0. With regard to increasing the pH value is gradually decreased adsorption efficiency. Langmuir model was better, because this model has higher reliability of regression than Freudlich model.