Adsorption of acenaphthene on porous organic polymers

Adsorption behavior-of the three-ring polynuclear aromatic hydrocarbon (PAI-I) acenaphthene from aqueous solutions on the adsorber polymers Wofatit EP 61 and EP 63 (Chemie GmbH Bitterfeld, Germany) was examined. Using dimethylsulfoxide as a solubilizer, equilibrium, kinetic, and fixed-bed dynamic experiments could be carried out. Freundlich parameters for equilibrium data were obtained, exhibiting high capacities at low liquid concentrations: K-F = 0.14 mg(1-g).L-g/mg(A) and n = 0.5 for EP 61; and K-F = 0.22 mg(1-n).L/mg(A) and n = 0.39 for EP 63, By fitting the numerical solution of a mathematical model to experimental data from kinetic experiments in a differential bed adsorber operated at high circulation velocity, effective intraparticle diffusivity could be estimated to be D-eff = 2.5.10(-10) cm(2)/s. According to these data and parameters from empirical equations, breakthrough curves were predicted analytically and numerically and compared to experimental data, A good agreement with the numerical solution was observed. The presence of dimethylsulfoxide influenced neither equilibrium nor kinetic data.