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

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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.

Original languageEnglish
Pages (from-to)172-177
Number of pages6
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume355
Issue number1-3
DOIs
Publication statusPublished - 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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