Adsorption Characteristic of Phenol by Hydroxamic Acid Functionalized Polystyrene Resin

Salicylhydroxamic acid (SHA) was covalently bounded onto the chloromethylated cross-linked polystyrene spheres (CPS) through the Friedel-Crafts alkylation reaction between them, preparing the SHA functionalized spheres SHA-CPS. The structure of SHA-CPS was characterized by FT-IR. The adsorption properties of SHA-CPS spheres towards phenol and p-nitrophenol were studied through the kinetic and isotherm experiments. The effects of various factors including temperature and pH value on adsorption capacities of phenol on SHA-CPS spheres were researched. The adsorption thermodynamic properties were explored for explaining the adsorptive mechanism. Results show that SHA-CPS possesses very strong adsorption ability and fast adsorption rate for phenol and p nitrophenol. The adsorption kinetic processes are in conformity with the pseudo first order equation well. The adsorption ability is significantly dependent on temperature and pH value. The adsorption isotherms conform well to the Freundich model, which is monolayer adsorption. Besides, SHA-CPS has the better reusability.