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BIBTEX RIS

PREPARATION AND EVALUATION OF MAGNETIC CHITOSAN PARTICLES MODIFIED WITH ETHYLENEDIAMINE AND Fe(III) FOR THE REMOVAL OF Cr(VI) FROM AQUEOUS SOLUTIONS

2014; Brazilian Chemical Society; Linguagem: Inglês

10.5935/0100-4042.20140245

ISSN

1678-7064

Autores

Thiago Vinícius Toledo, Carlos Roberto Bellato, Carlos H. Ferreira de Souza, Junielly Tomaz Domingues, Danilo De C. Silva, César Reis, Maurício Paulo Ferreira Fontes,

Tópico(s)

Adsorption and biosorption for pollutant removal

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.Fe 3+ 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 o C. 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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