Macroporous crosslinked polydivinylbenzene/ polyacryldiethylenetriamine (PDVB/PADETA) interpenetrating polymer networks (IPNs) and their efficient adsorption to o-aminobenzoic acid from aqueous solutions

摘要

Macroporous crosslinked polydivinylbenzene/polyacryldiethylenetriamine (PDVB/PADETA) interpenetrating polymer networks (IPNs) were prepared in this study and their adsorption performance was investigated using o-aminobenzoic acid as the adsorbate. The results indicated that PDVB/PADETA IPNs had a large equilibrium capacity to o-aminobenzoic acid, the Freundlich and Sips models were appropriate for fitting the equilibrium data, and the isosteric enthalpy kept constant (about -30 kJ mol~(-1)) with the equilibrium capacity at 5-125 mg g~(-1). The pseudo-first-order rate equation characterized the kinetic data better than the pseudo-second-order rate equation. At an initial concentration of 593.1 mg L~(-1) and a flow rate of 84 mL h~(-1), the breakthrough and saturated capacities were 50.62 and 95.70 mg mL~(-1) wet resin, respectively, and the resin column could be regenerated by 0.1 mol L~(-1) of sodium hydroxide(w/v) and 40% of ethanol (v/v).