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

AUTOR(ES)

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

FONTE

Quím. Nova

DATA DE PUBLICAÇÃO

2014

RESUMO

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.

Documentos Relacionados

• Evaluation of analytical procedures for determination of Cr(III and Cr(VI) in solid samples.
• Reduction of Fe(III), Cr(VI), U(VI), and Tc(VII) by Deinococcus radiodurans R1
• Mechanisms for Accessing Insoluble Fe(III) Oxide during Dissimilatory Fe(III) Reduction by Geothrix fermentans
• Preparation and application of a magnetic composite (Mn3O4/Fe3O4) for removal of As(III) from aqueous solutions
• Reduction of Cr(VI) by a Consortium of Sulfate-Reducing Bacteria (SRB III)