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
2014 Química Nova  
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
more » ... thermic 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.
doi:10.5935/0100-4042.20140245 fatcat:pru5dcrvhnbkzfvcxqkpaulvsy