Adsorption Characteristics of Fumaric Acid onto Weakly Basic Hypercrosslinked Polystyrene Ion-exchangers

摘要

A new weakly basic ion-exchanger (called XC-11), with a hypercrosslinked macroporous polystyrene matrix and a high specific surface area, was synthesized. When traditional weakly basic ion-exchange resins were employed in adsorption experiments, it was found that their sphericity after attrition decreased drastically when they were used ten times cyclically to adsorb and desorb fumaric acid from actual manufacturing effluent. This indicated that a traditional weakly basic exchange resin could not be applied in practice for the recovery of fumaric acid from industrial wastewater. However, the mechanical strengths of the self-synthesized new weakly basic ion-exchanger XC-11 and the hypercrosslinked polymeric adsorbent NDA-150 remained virtually unchanged under the same conditions, indicating their feasibility for practical applications.