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

被引：13
|
作者：
Toledo, Thiago V. [1 ]
Bellato, Carlos R. [1 ]
Ferreira de Souza, Carlos H. [1 ]
Domingues, Junielly T. [1 ]
Silva, Danilo de C. [1 ]
Reis, Cesar [1 ]
Ferreira Fontes, Mauricio P. [2 ]
机构：
[1] Univ Fed Vicosa, Dept Quim, BR-36570000 Vicosa, MG, Brazil
[2] Univ Fed Vicosa, Dept Solos, BR-36570000 Vicosa, MG, Brazil
来源：
QUIMICA NOVA | 2014年 / 37卷 / 10期
关键词：
magnetic chitosan; adsorption; chromium(VI); EFFECTIVE ADSORPTION; HEXAVALENT CHROMIUM; ACTIVATED CARBON; IONIC LIQUID; DYES; METAL; HYDROTALCITE; EQUILIBRIUM; COMPOSITES; ARSENIC(V);
D O I：
10.5935/0100-4042.20140245
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The adsorption of Cr(VI) in aqueous solution by magnetic particles of crosslinked chitosan-ethylenediamine-Fe(III) (MPCh-EDAFeCL) 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 degrees 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.
引用
收藏
页码：1610 / +
页数：9
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