Effective adsorption of phenolic compounds by functional group modified resins: behavior and mechanism

A series of functional hyper-crosslinked resins were successfully synthesized by incorporating amino, hydroxyl, and complex functional groups into post-crosslinked polymer. Possessing high specific surface area and effective functional groups, the newly synthesized resins showed excellent adsorption capacity toward various phenolic compounds. HC-IT displayed huge advantage over the others. Its adsorption capacity for salicylic acid was up to 336 mg/g, which was 3.01-6.64 times higher than that of the commercial resins and 2.33 times higher than its non-functionalized precursor HCLR (144 mg/g). The improved adsorption capacity was attributed to its high specific surface area, good polarity, and proper pore structure.