Adsorption of Ni2+ from aqueous solutions by novel polyethyleneimine-attached poly(p-chloromethylstyrene) beads

Say R., Tuncel A., Denizli A.

JOURNAL OF APPLIED POLYMER SCIENCE, vol.83, no.11, pp.2467-2473, 2002 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 83 Issue: 11
  • Publication Date: 2002
  • Doi Number: 10.1002/app.10239
  • Journal Name: JOURNAL OF APPLIED POLYMER SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2467-2473
  • Keywords: water purification, polyethyleneimine, heavy metal removal, Ni(II), adsorption, POLY(2-HYDROXYETHYL METHACRYLATE) MEMBRANES, HEAVY-METAL IONS, CHELATING RESIN, LIQUID MEMBRANE, COPPER IONS, REMOVAL, MERCURY, CADMIUM, WATER, LEAD
  • Anadolu University Affiliated: No

Abstract

In this study Ni2+ adsorption properties of polyethyleneimine (PEI)-attached poly(p-chloromethylstyrene) (PCMS) beads were investigated. Spherical beads with an average size of 186 gm were obtained by the suspension polymerization of p-chloromethylstyrene conducted in an aqueous dispersion medium. Owing to the reasonably rough character of the bead surface, PCMS beads had a specific surface area of 14.1 m(2)/g. PEI chains could be covalently attached onto the PCMS beads with equilibrium binding capacities up to 208 mg PEI/g beads, via a direct chemical reaction between the amine and chloro-methyl groups. After PEI adsorption with 10% (w/w) initial PEI concentration, free amino content of PEI-attached PCMS beads was determined as 0.91 mEq/g. PEI-attached PCMS beads were utilized as adsorbents in the adsorption/desorption of Ni2+ ions from synthetic solutions. The adsorption process was fast; 90% of adsorption occurred within 90 min, and equilibrium was reached at around 2 h. Adsorption capacity was obtained to be 78.2 mg/g at a pH of about 6.0. The chelating beads can be easily regenerated by 0.1 M HNO3, with higher effectiveness. (C) 2002 John Wiley Sons, Inc.