Kinetics of uptake of Cu2+ and Cd2+ by Mg-Al layered double hydroxides intercalated with citrate, malate, and tartrate

被引：37
作者：
Kameda, Tomohito [1 ]
Takeuchi, Hidenori [1 ]
Yoshioka, Toshiaki [1 ]
机构：
[1] Tohoku Univ, Grad Sch Environm Studies, Aoba Ku, Sendai, Miyagi 9808579, Japan
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2010年 / 355卷 / 1-3期
关键词：
Mg-Al layered double hydroxide; Organic acid anion; Uptake kinetics; Heavy metal ion; HEAVY-METAL IONS; AQUEOUS-SOLUTION; 2,6-NAPHTHALENE DISULFONATE; 2-NAPHTHALENE SULFONATE; BISPHENOL-A; PYROAURITE; ADSORPTION; ANION; WATER; PB2+;
D O I：
10.1016/j.colsurfa.2009.12.005
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：
In this study, kinetics of the uptake Of Cu2+ and Cd2+ by Mg-Al layered double hydroxides (Mg-Al LDHs) intercalated with citrate(3-) (C6H5O73-), malate(2-) (C4H4O52-), and tartrate(2-) (C4H4O62-) ill the interlayer were examined. When the Mg-Al LDHs were added to Cu2+ and Cd2+ solutions of a constant pH of 5.0. the concentrations Of Cu2+ and Cd2+ decreased with increasing temperature. The uptake was shown to occur as chelation between the heavy metal ions and the organic acid anions. The uptake rate equation was found to be dependent on the type of chelate formed. (C) 2009 Elsevier B.V. All rights reserved.
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页码：172 / 177
页数：6
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