THE STUDY ON THE PRORERTIES OF ADSORPTION OF PYRIDINE AND N,N-DIMETHYLANILINE BY PHENOLIC RESIN ADSORBENT IN AQUEOUS SYSTEM

The adsorption of phenolic resin adsorbent for pyridine and N,N-dimethylaniline was studied in aqueous solutions under static and dynamic conditions in this paper. The dominating mechanism of adsorption of pyridine and N,N-dimethylaniline by phenolic resin adsorbent in aqueous solutions is deduced a hydrophobic sorption process from the experimental results. A semi-empirical rate equation adequately fits the sorption rate data of pyridine and N,N-dimethylaniline in the initial period, that is, till about 38.3~48.9% of the equilibrium sorption is attained. The experimental results show that the equilibrium sorption date for adsorbent JDW-2/pyridine (or JDW-2/N,N-dimethylaniline) systems in aqueous solutions indicated good agreement with the Langmuir isotherm equation. The correlation coefficients are bigger than 0.99. The sorption of pyridine and N,N-dimethylaniline in hexane therefore is monomolecular sorption. It is clear that the volumes of in 80% aqueous ethanol at the rate of desorption 1BV/h for removing 91.52% and 94.85% all the pyridine adsorbed on JDW-2 are 3.6 and 4.8 bed volumes respectively under dynamic conditions, which show that phenolic resin adsorbent own excellent desorption performance. It is very good to use 80% aqueous ethanol as desorption solvent stripping pyridine from JDW-2.