Polyacrolein (PA) was prepared by photoinduced free radical polymerization for adsorption of congo red (CR). The structural and physicochemical properties of PA were characterized using BET, zeta potential measure-ments, SEM, FT-IR and XPS. The adsorption process of CR accorded with the pseudo-second-order kinetics, while the adsorption isotherm conformed to be the Langmuir model and the adsorption was proved to be the spon-taneous and endothermic process (Delta G(0) < 0, Delta H-0 > 0). Electrostatic attraction, hydrogen bond and chemical reaction (formation of imine) were the critical drivin...
