Competitive removal of nickel (II), cobalt (II), and zinc (II) ions from aqueous solutions by starch‐graft‐acrylic acid copolymers |
| |
| Authors: | Gamze Güçlü Kubilay Güçlü Sibel Keleş |
| |
| Affiliation: | 1. Department of Chemical Engineering, Faculty of Engineering, Istanbul University, 34320 Avc?lar, Istanbul, Turkey;2. Department of Chemistry, Faculty of Engineering, Istanbul University, 34320 Avc?lar, Istanbul, Turkey |
| |
| Abstract: | Graft copolymerization of acrylic acid (AA) onto starch was carried out with ceric ammonium nitrate as initiator under nitrogen atmosphere. The grafting percentages (GP%) of starch‐graft‐acrylic acid (St‐g‐AA) copolymers were determined. The effect of GP% of St‐g‐AA copolymers on the competitive removal of Co2+, Ni2+, Zn2+ ions from aqueous solution was investigated at different pH (2, 4, 6). The concentrations of each ion in aqueous solution 5 mmol/L. Effects of various parameters such as treatment time, initial pH of the solution and grafting percentage of starch graft copolymers were investigated. Metal ion removal capacities of St‐g‐AA copolymers increased with GP% of the copolymers and pH. The results show that the removal of metal ions followed as given in the order Co2+ > Ni2+ > Zn2+. In this study, metal ion removal capacities were determined by atomic absorption spectrophotometer (AAS). © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007 |
| |
| Keywords: | starch acrylic acid heavy metal ion removal graft copolymers |
|
|
