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

Química Nova

Thiago V. Toledo²  Carlos R. Bellato²  Carlos H. Ferreira De Souza²  Junielly T. Domingues²  Danilo De C. Silva²  César Reis²  Maurício P. Ferreira Fontes¹ 

[1] ,Universidade Federal de Viçosa Departamento de Química Viçosa MG ,Brasil

关键词: magnetic chitosan;    adsorption;    chromium(VI);   

DOI  :  10.5935/0100-4042.20140245

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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