Fast removal of uranium from aqueous solutions using tetraethylenepentamine modified magnetic chitosan resin

被引:149
作者
Elwakeel, Khalid Z. [1 ]
Atia, Asem A. [2 ]
Guibal, Eric [3 ]
机构
[1] Port Said Univ, Fac Sci, Dept Environm Sci, Port Said, Egypt
[2] Menoufia Univ, Fac Sci, Dept Chem, Menoufia, Egypt
[3] Ecole Mines Ales, Ctr Mat Mines Ales, MPA BCI C2MA, F-30319 Ales, France
关键词
Uranyl ion removal; Kinetics; Thermodynamics; Chitosan derivative; Ferromagnetic sorbent; METAL-IONS; ADSORPTION; PRECIPITATION; SEPARATION; WATER; MERCURY(II); RECOVERY; MEDIA;
D O I
10.1016/j.biortech.2014.01.037
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Chitosan was cross-linked using glutaraldehyde in the presence of magnetite. The resin was chemically modified through the reaction with tetraethylenepentamine (TEPA) to produce amine bearing chitosan. The resin showed a higher affinity towards the uptake of UO22+ ions from aqueous medium: maximum sorption capacity reached 1.8 mmol g (1) at pH 4 and 25 degrees C. The nature of interaction of UO22+ ions with the resin was identified. Kinetics were carried out at different temperatures and thermodynamic parameters were evaluated. Breakthrough curves for the removal of UO22+ were studied at different flow rates, bed heights and after 3 regeneration cycles. Hydrochloric acid (0.5 M) was used for desorbing UO22+ from loaded resin: desorption yield as high as 98% was obtained. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:107 / 114
页数:8
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