The features of vanillin and isovanillin sorption onto fibrous anion exchanger FIBAN A-1
The kinetic and equilibrium features of vanillin and isovanillin sorption by strong basic anion-exchanger Fiban A-1 in static conditions are determined. The equilibrium time in the system hydroxybenzaldehyde solution - sorbent has been measured. The analysis of kinetic curves for isomers sorption based on Boyd-Adamson kinetic model has been made, the mechanism of mixed diffusion has been established for vanillin and isovanillin uptake. The values of isovanillin extraction degree by anion-exchanger Fiban A-1 have been estimated at pH range 2-12. Based on the analysis of vanillin and isovanillin sorption isotherms, the polymolecular mechanism of sorbate uptake has been revealed. The equilibrium characteristics of hy-droxybenzaldehydes sorption have been determined using the sorption models of Langmuir and BET.