Article

Water, Air, and Soil Pollution

, Volume 192, Issue 1, pp 337-348

First online:

Enhanced Adsorption of Metal Ions Onto Polyethyleneimine-Impregnated Palm Shell Activated Carbon: Equilibrium Studies

  • Chun Yang YinAffiliated withFaculty of Chemical Engineering, Universiti Teknologi MARA Email author 
  • , Mohamed Kheireddine ArouaAffiliated withDepartment of Chemical Engineering, Faculty of Engineering, University of Malaya
  • , Wan Mohd Ashri Wan DaudAffiliated withDepartment of Chemical Engineering, Faculty of Engineering, University of Malaya

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Abstract

In this study, palm shell activated carbon was impregnated with polyethyleneimine (PEI) and the effect of impregnation on batch adsorption of Ni2+, Cd2+or Pb2+ as well as the equilibrium behavior of adsorption of metal ions on PEI-impregnated AC were investigated. PEI impregnation evidently increased the single metal adsorption capacities of Ni2+ or Cd2+except for Pb2+, where its adsorption capacities were reduced by 16.67% and 19.55% for initial solution pH of 3 and 5 respectively. This suggested that PEI-impregnated AC could be used for selective separation of Pb2+ ions from other metal ions. The adsorption data of all the metal ions on both virgin and PEI-impregnated AC for both initial solution pH of 3 and 5 generally fitted the Langmuir and Redlich-Peterson isotherms considerably better than the Freundlich isotherm.

Keywords

Adsorption Isotherms Metal ions Palm shell activated carbon Polyethyleneimine