THE STUDY ON THE PROPERTIES OF ADSORPTION OF VB_(12) BY PHENOLIC RESIN ADSORBENT
Zhong Lin Wang · Acta Polymerica Sinica · 2004
The adsorption of VB 12 was studied by using three ph enolic resin adsorbents:JDW 1,JDW 2,prepared in the laboratory and a commerci al product Duolite S 761 under static and dymanic conditions.The experimental r esults show that JDW 1 is superior to Duolite S 761 in adsorption of VB 12 (the s aturation adsorption capacity of JDW 1 for VB 12 is 84 mg/g dried resin).A semi e mpirical rate equation adequately fits the sorption rate data of VB 12 in t he ini tial period,till about 43%～69% of the equilibrium adsorption.The equilibrium adsorption date for phenolic resin adsorbents/VB 12 sys tems showed good agreement with the Langmuir isotherm equation.The correlation coeff icients are larger than 0 99.The adsorption of VB 12 therefore is monomole cular adsorption. Experiments of stripping VB 12 from JDW 2 resin with 80% aqueous methoanol showed that 92 20% and 95 93% of the adsorbed VB 12 we re removed at 4 2 and 6 4 bed volumes, respectively,(the desorption rate was 1 1 BV/h).It implies that phenolic resin adsorbents own excellent desorption performance, and it is good to use 80% aqueous methanol as desorption solvent for stripping VB 12 from JDW 2.