Química Nova (Jan 2014)

Preparation and evaluation of magnetic chitosan particles modified with ethylenediamine and Fe(III) for the removal of Cr(VI) from aqueous solutions

  • Thiago V. Toledo,
  • Carlos R. Bellato,
  • Carlos H. Ferreira de Souza,
  • Junielly T. Domingues,
  • Danilo de C. Silva,
  • César Reis,
  • Maurício P. Ferreira Fontes

DOI
https://doi.org/10.5935/0100-4042.20140245
Journal volume & issue
Vol. 37, no. 10
pp. 1610 – 1617

Abstract

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The adsorption of Cr(VI) in aqueous solution by magnetic particles of crosslinked chitosan-ethylenediamine-Fe(III) (MPCh-EDA-FeCL) was studied in a batch system. Fe3+ in the MPCh-EDA-FeCL permitted that adsorption of Cr(VI) occurred with maximum efficiency between pH 3 and 11. The maximum adsorption capacity at pH 7.0 was 81.04 mg g-1 at 25 ºC. The adsorption kinetic process was described by the pseudo-second-order model. Thermodynamic parameters indicated spontaneous, exothermic and chemical adsorption nature. The adsorbent was successively regenerated using a 0.1 mol L-1 NaOH solution. Results were satisfactory for treatment of wastewater from the electroplating industry.

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