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Competitive removal of nickel (II), cobalt (II), and zinc (II) ions from aqueous solutions by starch‐ graft ‐acrylic acid copolymers
Author(s) -
Güçlü Gamze,
Güçlü Kubilay,
Keleş Sibel
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26866
Subject(s) - copolymer , ceric ammonium nitrate , aqueous solution , acrylic acid , starch , metal ions in aqueous solution , grafting , polymer chemistry , nuclear chemistry , cobalt , chemistry , zinc , nickel , metal , inorganic chemistry , materials science , organic chemistry , polymer
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 Co 2+ , Ni 2+ , Zn 2+ 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 Co 2+ > Ni 2+ > Zn 2+ . In this study, metal ion removal capacities were determined by atomic absorption spectrophotometer (AAS). © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007