Arsenic adsorption using Fe(III)-loaded porous amidoximated acrylonitrile/itaconic copolymers

摘要: A highly selective polymeric ligand exchanger was developed for the removal of trace As(V) from aqueous solution. This adsorbent prepared by loading Fe(III) onto porous amidoximated polyacrynitrile (AN)/itaconic acid (IA) copolymers (Fe(III)-AO AN/IA). Negligible ferric ion dissolution observed Fe(III)-AO AN/IA in solution acidic pHs up to 2. adsorption is a pH-dependent process with maximum capacity 1.32 mg/g at pH 2–3. The found be governed pseudo second-order kinetics, and could described Freundlich model. had higher selectivity than other anions simulated groundwater body such as Cl−, SO42−, PO43−, SiO32−. Fixed-bed indicated that effectively captured 400 μg/L <10 within 190 bed volumes (BV). adsorbed on efficiently eluted 10 BV 5% NaCl (at = 9.0).