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Desalination and Water Treatment Volume 57, 2016 - Issue 5
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Articles

Removal of Cu2+ from the aqueous solution by tartrate-intercalated layered double hydroxide

Yanming ShenDepartment of Chemical Engineering, Shenyang University of Chemical Technology, No. 11 Street, Shenyang Economical and Development Zone, Shenyang110142, Liaoning, P.R. China, Tel. +86 24 89383529; Fax: +86 24 89383760Correspondence[email protected]
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Xiaolei ZhaoDepartment of Chemical Engineering, Shenyang University of Chemical Technology, No. 11 Street, Shenyang Economical and Development Zone, Shenyang110142, Liaoning, P.R. China, Tel. +86 24 89383529; Fax: +86 24 89383760Correspondence[email protected]
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Xi ZhangDepartment of Chemical Engineering, Shenyang University of Chemical Technology, No. 11 Street, Shenyang Economical and Development Zone, Shenyang110142, Liaoning, P.R. China, Tel. +86 24 89383529; Fax: +86 24 89383760Correspondence[email protected]
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Shifeng LiDepartment of Chemical Engineering, Shenyang University of Chemical Technology, No. 11 Street, Shenyang Economical and Development Zone, Shenyang110142, Liaoning, P.R. China, Tel. +86 24 89383529; Fax: +86 24 89383760Correspondence[email protected]
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Dongbin LiuDepartment of Chemical Engineering, Shenyang University of Chemical Technology, No. 11 Street, Shenyang Economical and Development Zone, Shenyang110142, Liaoning, P.R. China, Tel. +86 24 89383529; Fax: +86 24 89383760Correspondence[email protected]
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Lihui FanDepartment of Chemical Engineering, Shenyang University of Chemical Technology, No. 11 Street, Shenyang Economical and Development Zone, Shenyang110142, Liaoning, P.R. China, Tel. +86 24 89383529; Fax: +86 24 89383760Correspondence[email protected]
Pages 2064-2072 | Received 25 Apr 2014, Accepted 24 Oct 2014, Published online: 19 Nov 2014
 
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Abstract

The tartrate-intercalated MgAl layered double hydroxide (MgAl-TA LDH) was prepared by ion-exchange method at the acid solution using MgAl-CO3 LDH as the precursor. The adsorption of Cu2+ on MgAl-TA LDH was studied and some influence factors such as contact time, initial Cu2+ concentration, adsorbent dosage, solution pH, and adsorption temperature were investigated. Three kinds of adsorption isotherms (Langmuir model, Freundlich model, and Redlich–Peterson model) were investigated; the results indicated that equilibrium was well described by Langmuir isotherm, predicting the adsorption of Cu2+ on MgAl-TA adsorbents was a monolayer adsorption. The equilibrium kinetic adsorption data were fitted to the pseudo-second order kinetic equation. Furthermore, the adsorption of Cu2+ was controlled mainly by chemical process combined with intra-particle diffusion. Parameters of adsorption thermodynamic suggested that the interaction of Cu2+ adsorbed by MgAl-TA LDH adsorbents was spontaneous and endothermic.

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