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). (C) 2014 Elsevier Inc. All rights reserved.