Competitive removal of nickel (II), cobalt (II), and zinc (II) ions from aqueous solutions by starch-graft-acrylic acid copolymers

Guclu G., Guclu K., KELEŞ S.

JOURNAL OF APPLIED POLYMER SCIENCE, vol.106, no.3, pp.1800-1805, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 106 Issue: 3
  • Publication Date: 2007
  • Doi Number: 10.1002/app.26866
  • Journal Name: JOURNAL OF APPLIED POLYMER SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1800-1805
  • Istanbul University Affiliated: Yes

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+, 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 Co2+ > Ni2+ > Zn2+. In this study, metal ion removal capacities were determined by atomic absorption spectrophotometer (AAS). (C) 2007 Wiley Periodicals, Inc.