Cadmium Recovery from HCl Solutions Using Cyanex 301 and Cyanex 302 Immobilized in Alginate Capsules (Matrix-Type vs. Mononuclear-Type Mode of Encapsulation)

被引：9
作者：
Alba, Janette [1 ,2 ]
Navarro, Ricardo [1 ]
Saucedo, Imelda [1 ]
Vincent, Thierry [2 ]
Guibal, Eric [2 ]
机构：
[1] Univ Guanajuato, Div Ciencias Nat & Exactas, Dept Quim, Cerro Venada S-N, Guanajuato, Mexico
[2] Ecole Mines Ales, Ctr Mat Mines Ales, 6 Ave Clavieres, F-30319 Ales, France
来源：
SOLVENT EXTRACTION AND ION EXCHANGE | 2017年 / 35卷 / 05期
关键词：
Alginate; cadmium; Cyanex; 301; 302; encapsulation; intraparticle diffusion; metal desorption; sorption isotherms; uptake kinetics; IMPREGNATED MACROPOROUS RESINS; PARTICLE DIFFUSION KINETICS; HEAVY-METAL IONS; SOLVENT-EXTRACTION; HYDROCHLORIC-ACID; PHOSPHORIC MEDIA; CD(II) SORPTION; ADSORPTION; CHITOSAN; LIQUID;
D O I：
10.1080/07366299.2017.1344489
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Cyanex 301 and Cyanex 302 have been immobilized in alginate capsules by two methods: the matrix-type process immobilizes the extractant as homogeneous-dispersed vesicles while the mononuclear mode consists of encapsulation of the extractant drop by an alginate layer. The influence of HCl concentration on Cd(II) removal is discussed as a function of acid concentration and extractant. The sorption isotherms are fitted by the Langmuir model; maximum sorption capacities reach up to 42 mg Cd g(-1) in 0.1 M HCl. Uptake kinetics are controlled by resistance to intraparticle diffusion. Cadmium is desorbed using either 1 M HNO3 or 1 M thiourea/1 M HCl solutions.
引用
收藏
页码：345 / 362
页数：18
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