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EDTA functionalized Fe3O4/graphene oxide for efficient removal of U(VI) from aqueous solutions.
- Source :
-
Journal of Colloid & Interface Science . Nov2017, Vol. 506, p300-307. 8p. - Publication Year :
- 2017
-
Abstract
- In this study, a regenerable magnetic ligand material (EDTA-mGO) was fabricated by binding chelating groups (EDTA) onto Fe 3 O 4 /graphene oxide and applied to remove U(VI) from aqueous solution. The sorption experiments were investigated under different experimental conditions, such as temperature, contact time and pH. EDTA-mGO showed fast removal capacity for U(VI) (<1.5 h) with high sorption ability (277.43 mg/g). The removal mechanisms mainly attributed to the metal-binding organic ligand (EDTA) and the electrostatic attractions between U(VI) and oxygenic functional groups. In addition, the as-prepared EDTA-mGO dispersed in water could be easily collected after the sorption by the external magnetic field within 10 s. The removal of U(VI) by EDTA-mGO followed the pseudo-second-order rate better than the pseudo-first-order. The thermodynamic data indicated the endothermic and the spontaneous nature of U(VI) sorption. Furthermore, the reproducibility studies suggested that EDTA-mGO has a good reusability and a high stability. [ABSTRACT FROM AUTHOR]
- Subjects :
- *AQUEOUS solutions
*LIGANDS (Chemistry)
*GRAPHENE oxide
*SORPTION
*FUNCTIONAL groups
Subjects
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 506
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 124795460
- Full Text :
- https://doi.org/10.1016/j.jcis.2017.07.057