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Biomimetic synthesis of polydopamine-graphene oxide/hydroxyapatite for efficient and fast uranium(VI) capture from aqueous solution.
- Source :
- Environmental Science & Pollution Research; Nov2023, Vol. 30 Issue 53, p114569-114581, 13p
- Publication Year :
- 2023
-
Abstract
- A novel and efficient mesoporous nano-absorbent for U(VI) removal was developed through an environment-friendly route by inducing the biomimetic mineralization of hydroxyapatite (HAP) on the bioinspired surface of polydopamine-graphene oxide (PDA-GO). PDA-GO/HAP exhibited the greatly rapid and efficient U(VI) removal within 2 min, and much higher U(VI) adsorption capacity of 433.07 mg·g<superscript>−1</superscript> than that of GO and PDA-GO. The enhanced adsorption capacity was mainly attributed to the synergistic effect of O–H, –C=N–, and PO<subscript>4</subscript><superscript>3−</superscript> functional groups and the incorporation of uranyl ions by the formation of a new phase (chernikovite, H<subscript>2</subscript>(UO<subscript>2</subscript>)<subscript>2</subscript>(PO<subscript>4</subscript>)<subscript>2</subscript>·8H<subscript>2</subscript>O). The adsorption process of U(VI) fitted well with pseudo-second-order kinetic and Langmuir isotherm model. Moreover, PDA-GO/HAP showed a high U(VI) adsorption capacity in a broad range of pH values and owned good thermal stability. PDA-GO/HAP with various excellent properties made it a greatly promising adsorbent for extracting uranium. Our work developed a good strategy for constructing fast and efficient uranium-adsorptive biomimetic materials. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09441344
- Volume :
- 30
- Issue :
- 53
- Database :
- Complementary Index
- Journal :
- Environmental Science & Pollution Research
- Publication Type :
- Academic Journal
- Accession number :
- 173765391
- Full Text :
- https://doi.org/10.1007/s11356-023-30321-1