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

Tomohito Kameda; Hidenori Takeuchi; Toshiaki Yoshioka

doi:10.1016/j.colsurfa.2009.12.005

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

Tomohito Kameda, Hidenori Takeuchi, Toshiaki Yoshioka

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

In this study, kinetics of the uptake of Cu²⁺ and Cd²⁺ by Mg-Al layered double hydroxides (Mg-Al LDHs) intercalated with citrate^3- (C₆H₅O₇^3-), malate^2- (C₄H₄O₅^2-), and tartrate^2- (C₄H₄O₆^2-) in 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.

Original language	English
Pages (from-to)	172-177
Number of pages	6
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	355
Issue number	1-3
DOIs	https://doi.org/10.1016/j.colsurfa.2009.12.005
Publication status	Published - 2010 Feb 20

Keywords

Heavy metal ion
Mg-Al layered double hydroxide
Organic acid anion
Uptake kinetics

ASJC Scopus subject areas

Surfaces and Interfaces
Physical and Theoretical Chemistry
Colloid and Surface Chemistry

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

abstract = "In this study, kinetics of the uptake of Cu2+ and Cd2+ by Mg-Al layered double hydroxides (Mg-Al LDHs) intercalated with citrate3- (C6H5O73-), malate2- (C4H4O52-), and tartrate2- (C4H4O62-) in 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.",

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N2 - In this study, kinetics of the uptake of Cu2+ and Cd2+ by Mg-Al layered double hydroxides (Mg-Al LDHs) intercalated with citrate3- (C6H5O73-), malate2- (C4H4O52-), and tartrate2- (C4H4O62-) in 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.

AB - In this study, kinetics of the uptake of Cu2+ and Cd2+ by Mg-Al layered double hydroxides (Mg-Al LDHs) intercalated with citrate3- (C6H5O73-), malate2- (C4H4O52-), and tartrate2- (C4H4O62-) in 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.

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