Batch Chromium(VI), Cadmium(II) and Lead(II) Removal from Aqueous Solutions by Horticultural Peat

  • Mihaela Ulmanu
  • Ildiko Anger
  • Yolanda Fernández
  • Leonor Castrillón
  • Elena Marañón
Article

Abstract

The selectivity and uptake capacity of horticultural peat available in Romania was evaluated with respect to the removal of Cd(II), Cr(VI) and Pb(II) ions from aqueous solution. The kinetics, sorption capacities, selectivity and pH dependence of sorption were determined. The influence of metal concentration in solution is discussed in the terms of Langmuir and Freundlich isotherm and constants. Sorption capacities increased with increasing metal concentration in solution. For solutions containing 300 mg/l of metal, the observed uptake capacities were 20 mg Cd(II)/g peat, 15 mg Cr(VI)/g peat and 30 mg Pb(II)/g peat. The study proved that horticultural peat is a suitable material for the removal of the studied heavy metal ions from aqueous solutions, achieving removal efficiencies higher than 90%, and could be considered as a potential material for treating effluent polluted with Cd(II), Cr(VI) and Pb(II) ions.

Keywords

Adsorption isotherms Adsorption kinetics Cadmium Chromium Lead Peat pH effect 

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Mihaela Ulmanu
    • 1
  • Ildiko Anger
    • 1
  • Yolanda Fernández
    • 2
  • Leonor Castrillón
    • 2
  • Elena Marañón
    • 2
  1. 1.National R&D Institute for Non-Ferrous and Rare MetalsPantelimonRomania
  2. 2.Department of Chemical Engineering and Environmental Technology, Higher Polytechnic School of EngineeringUniversity of OviedoGijónSpain

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