Acetamide-Modified Hyper-Cross-Linked Resin: Synthesis, Characterization, and Adsorption Performance to Phenol from Aqueous Solution

Acetamide-modified hyper-cross-linked resin, HCP-HMTA-AA, was prepared and its adsorption performance was evaluated using phenol as the adsorbate. The prepared HCP-HMTA-AA owned predominant micro/mesopores and medium polarity, making it possess a superior adsorption to phenol as compared with polystyrene (PS), chloromethylated polystyrene (CMPS), hyper-cross-linked polymer (HCP) and amino-modified hyper-cross-linked resin (HCP-HMTA). The adsorption enthalpy was -99.56 kJ/mol at zero fractional loading, multiple hydrogen bonding contributed to such a great adsorption enthalpy and an approximately planar hexahydric ring was formed between acetamide of HCP-HMTA-AA and phenol. The dynamic capacity of phenol on HCP-HMTA-AA was 291.3 mg/g at a feed concentration of 946.2 mg/L and a flow rate of 48 mL/h and the resin column was almost regenerated by a mixed solvent including 50% of ethanol (v/v) and 0.01 mol/L of sodium hydroxide (w/v). HCP-HMTA-AA was repeatedly used for five times and the equilibrium adsorption capacity for the five time reached 94.2% of the equilibrium adsorption capacity for the first time. (C) 2014 Wiley Periodicals, Inc.