Preparation of aluminum sludge composite gel spheres and adsorption of U(IV) from aqueous solution.
Adsorption
Aluminum sludge
Gel spheres
Polyvinyl alcohol
Sodium alginate
U(VI)
Journal
Environmental science and pollution research international
ISSN: 1614-7499
Titre abrégé: Environ Sci Pollut Res Int
Pays: Germany
ID NLM: 9441769
Informations de publication
Date de publication:
Jul 2020
Jul 2020
Historique:
received:
12
02
2020
accepted:
22
04
2020
pubmed:
10
5
2020
medline:
11
7
2020
entrez:
9
5
2020
Statut:
ppublish
Résumé
A novel three-dimensional aluminum sludge/polyvinyl alcohol/sodium alginate(AS/PA/SA) gel spheres were designed and prepared for uranium(VI) adsorption, and it overcomes the shortcomings of poor recycling of powdery aluminum sludge adsorbent and poor stability of sodium alginate. Experiments show that the P-S-AS has a good pH range for removal of uranium (4-5). Fitting experimental data with pseudo-first-order kinetic model and pseudo-second-order kinetic model shows that the adsorption of U(VI) by P-S-AS is a chemical action. The fit of the Langmuir isotherm model and Freundlich isotherm model to the experimental data found that the P-S-AS adsorbed U(VI) to a single layer. Thermodynamic analysis shows that the adsorption occurs spontaneously, and an increase in temperature is favorable for the adsorption of uranium by the P-S-AS. Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis of the P-S-AS before and after adsorption showed that the main adsorption mechanism was the complexation reaction between functional groups and U(VI), the bonding reaction between metal oxides and U(VI).
Identifiants
pubmed: 32382912
doi: 10.1007/s11356-020-09032-4
pii: 10.1007/s11356-020-09032-4
doi:
Substances chimiques
Sewage
0
Uranium
4OC371KSTK
Aluminum
CPD4NFA903
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
26835-26844Subventions
Organisme : Natural Science Foundation of China
ID : 21177053
Organisme : Natural Science Foundation of Jilin Province
ID : 51174117
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