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 language | English |
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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 | |
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