Removal of Cu2+ from the aqueous solution by tartrate-intercalated layered double hydroxide. Issue 5 (26th January 2016)

• Record Type: Journal Article
• Authors: Shen, Yanming; Zhao, Xiaolei; Zhang, Xi; Li, Shifeng; Liu, Dongbin; Fan, Lihui
• Is Part Of: Desalination and water treatment. Volume 57:Issue 5(2016)
• Page Start: 2064
• Page End: 2072
• Publication Date: 2016-01-26
• Subjects: Layered double hydroxide -- Hydrotalcite -- Adsorption -- Heavy metal ion -- Regeneration; Saline water conversion -- Periodicals; Saline water conversion; Water -- Purification; Periodicals; 628.167
• DOI: 10.1080/19443994.2014.981866
• Languages: English
• ISSNs: 1944-3994

Abstract

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 Cu 2+ on MgAl-TA LDH was studied and some influence factors such as contact time, initial Cu 2+ 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 Cu 2+ 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 Cu 2+ was controlled mainly by chemical process combined with intra-particle diffusion. Parameters of adsorption thermodynamic suggested that the interaction of Cu 2+ adsorbed by MgAl-TA LDH adsorbents was spontaneous and endothermic.