Adsorption of Cu2+, Cd2+ and Pb2+ ions by layered double hydroxides intercalated with the chelating agents diethylenetriaminepentaacetate and meso-2,3-dimercaptosuccinate

被引：123

作者：

Pavlovic, I. ^{[1
]}

Perez, M. R. ^{[1
]}

Barriga, C. ^{[1
]}

Ulibarri, M. A. ^{[1
]}

机构：

[1] Univ Cordoba, Fac Ciencias, Dept Quim Inorgan & Ingn Quim, Cordoba 14071, Spain

来源：

APPLIED CLAY SCIENCE | 2009年 / 43卷 / 01期

关键词：

Hydrotalcite; LDH; Heavy metal uptake; Dmsa; Dtpa; HEAVY-METAL ADSORPTION; STABILITY-CONSTANTS; ANIONIC CLAYS; ZN; MONTMORILLONITE; BIOSORPTION; COPPER(II); SORPTION; SURFACE; CHARGE;

D O I：

10.1016/j.clay.2008.07.020

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：

The hydrotalcite-like compound [Zn2Al(OH)(6)]NO3 center dot nH(2)O (ZnAl-NO3) Was intercalated with the chelating agents diethylenetriaminepentaacetic acid (dtpa) and meso-2,3-dimercaptosuccinic acid (dmsa) by anion-exchange to uptake Cu2+, Cd2+ and Pb2+ from aqueous solutions. The amounts of heavy metals adsorbed at variable contact times and metal concentration were determined by atomic absorption spectrometry. The amounts removed of the three metal cations by both adsorbents were high. The shape of the adsorption isotherms obtained indicated specific interactions and a high host-guest affinity. However, the metal ions were removed from solution not only by chelation, but also by precipitation or even by isomorphic substitution of Zn2+ by another metal ions in the brucite-like layer. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：125 / 129

页数：5

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