Adsorption of heavy metals by layered double hydroxides grown in situ on Al foam. (24th June 2020)

• Record Type: Journal Article
• Authors: Kaciulis, S.; Bolli, E.; Varone, A.; Richetta, M.; Narducci, R.; Di Vona, M.L.; Ciotta, E.; Pizzoferrato, R.
• Other Names: Oswald Steffen guestEditor.; Watts John F. guestEditor.; Abel Marie‐Laure guestEditor.
• Is Part Of: Surface and interface analysis. Volume 52:Number 12(2020)
• Page Start: 996
• Page End: 999
• Publication Date: 2020-06-24
• Subjects: copper ions -- LDH -- metal adsorption -- SEM -- XPS -- XRD; Surfaces (Physics) -- Periodicals; Surface chemistry -- Periodicals; Thin films -- Periodicals; 541.33
• DOI: 10.1002/sia.6856
• Languages: English
• ISSNs: 0142-2421

Abstract

Abstract : We investigated the adsorption of heavy metal ions on a nanostructured coating of zinc‐aluminum layered double hydroxides (Zn‐Al LDHs) grown on aluminum foam by one‐step hydrothermal process. This approach aimed to increase the interactive surface and provide a more practical medium for removal of toxic heavy metals from aqueous media. The foam coated with LDH was characterized by using scanning electron microscopy and X‐ray diffraction. After immersion in a copper‐rich water solution, X‐ray photoelectron spectroscopy demonstrated the occurrence of adsorbed copper on the LDH‐coated foam with two oxidation states: particles of metallic copper Cu 0 with oxidized surface Cu +1 . X‐ray diffraction showed the presence of Cu +2 in the LDH structure.