Adsorption of metal cations from aqueous solution onto a natural and a model biocomposite

被引：22
作者：
Dávila-Jiménez, MM
Elizalde-González, MP
Geyer, W
Mattusch, J
Wennrich, R
机构：
[1] Univ Autonoma Puebla, Inst Ciencias, Ctr Quim, Puebla 72571, Mexico
[2] Univ Autonoma Puebla, Fac Ciencias Quim, Puebla 72571, Mexico
[3] UFZ Helmholtz Ctr Environm Res, Environm Res Ctr, Dept Analyt Chem, D-04318 Leipzig, Germany
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2003年 / 219卷 / 1-3期
关键词：
heavy metals; adsorption; biocomposite; model; water treatment;
D O I：
10.1016/S0927-7757(03)00052-9
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Batch adsorption studies have shown that a solid material (CACMM) extracted from a cactus was able to sorb Cu2+, Cd2+, Cr3+ CrO42-, Fe3+, Ni2+,Pb2+ and Zn2+ from aqueous solutions in the concentration range 100 - 1000 mg l(-1). Fractions of CACMM with different particle diameter presented different sorption patterns upon the studied metal cations. Copper retention was much greater than that of other cations for all the fractions under identical experimental conditions with a maximum efficiency of 84% for 1000 mg l(-1) Cu2+ solutions. Adsorption magnitude onto large particles of CACMMI (450 (mum) decreased in the series Cu2+ > Ni2+ > Cr3+ > Pb2+ > Zn2+ > Cd2+ > Fe3+ that correlates with the stability constants of the respective oxalate complexes indicating that the interaction of the metal cations follows a surface adsorption-complexation mechanism. The composition of a model composite, which simulates the sorption capacity of the natural cactus powders upon copper, was found. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：243 / 252
页数：10
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