Aplikácia nízkonakladových sorbentov k odstráneniu síranov a vybraných kovov z vodnej matrice.

Abstract

Adsorption of selected metals and sulphates on the surface of an orange peel from aqueous solution was investigated using batch (dosing) mechanism. Experiments were carried out as a function pH, sorbent dosage, contact time and temperature. The equilibrium adsorption constants were examined Langmuier and Freundlich isotherm model. The Langmuier model to describe the equilibrium data fits better than the Freundlich model. The maximize uptake of copper (q20 = 5 mg/g), manganese (q20 = 15 mg/g) and sulfate (q30 = 5 mg/g) on the surface of an orange peel appr. 90 %. Removal of iron (q20 = 10 mg/g) was appr. 55 %. Speed sorption kinetics will follow the pseudo-second order. Thermodynamic parameters depict the exothermic nature of sorption and the processes will spontaneous and favorable. FTIR analysis demonstrates that carboxyl and hydroxyl groups were involved in the uptake of ions. The sorption of contaminants from aqueous solution by Wood-Rotting fungi Troudnatec pásovaný (Fomitopsis pinicola) has been studied as the effect of pH, sorbent dosage, contact time and temperature. Langmuier and Freundlich model were applied to describe the sorption isotherms of metal ions. Langmuier model describes data obtained better than Freundlich isotherm. The maximum sorption capacity was under optimal conditions (pH 6.0, contact time 20-30 minutes at 25 °C) to remove sulfates (q20 = 5 mg/g), manganese (q20 = 15 mg/g) and copper (q20 = 5 mg/g) of 100 %. Uptake of iron (q20 = 10 mg/g) was 50 %. The calculated thermodynamic parameters showed that the sorption was feasible, spontaneous and sorption had exothermic nature. Kinetic examination of the experimental data showed that the sorption process will followed well pseudo-second order. The results suggest that the orange peel and wood