Adsorption of heavy metals by layered double hydroxides grown in situ on Al foam

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 t...

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Bibliographic Details
Published inSurface and interface analysis Vol. 52; no. 12; pp. 996 - 999
Main Authors Kaciulis, S., Bolli, E., Varone, A., Richetta, M., Narducci, R., Di Vona, M.L., Ciotta, E., Pizzoferrato, R.
Format Journal Article
LanguageEnglish
Published Bognor Regis Wiley Subscription Services, Inc 01.12.2020
Subjects
Adsorption
Aluminum
Aqueous solutions
Copper
copper ions
Heavy metals
Hydroxides
Ions
LDH
metal adsorption
Metal foams
Oxidation
Photoelectrons
SEM
Submerging
Surface chemistry
X-ray diffraction
XPS
XRD
Zinc
Zinc coatings
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Summary: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 Cu0 with oxidized surface Cu+1. X‐ray diffraction showed the presence of Cu+2 in the LDH structure.
ISSN:0142-2421
1096-9918
DOI:10.1002/sia.6856