Immobilization of in-situ formed Ni(OH)2 nanoparticles in chitosan beads for efficient removal of U(VI) from aqueous solutions
| Autor: | Zhirong Liu, Yun Wang, Zhao Li, Adesoji A. Adesina, Limin Zhou, Quanshui Chen, Kai Zeng |
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| Rok vydání: | 2017 |
| Předmět: |
Sorbent
Health Toxicology and Mutagenesis Inorganic chemistry Nanoparticle 02 engineering and technology 010403 inorganic & nuclear chemistry 01 natural sciences Endothermic process Analytical Chemistry Metal Chitosan chemistry.chemical_compound Adsorption Radiology Nuclear Medicine and imaging Spectroscopy Aqueous solution Public Health Environmental and Occupational Health Sorption 021001 nanoscience & nanotechnology Pollution 0104 chemical sciences Nuclear Energy and Engineering chemistry visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 314:467-476 |
| ISSN: | 1588-2780 0236-5731 |
| Popis: | Both metal hydroxides and chitosan have been recognized as effective scavengers for nuclide ions. However, the aggregation of metal hydroxides and the weak mechanical strength of chitosan beads greatly restricts their application. Herein, the in-situ formed Ni(OH)2 nanoparticles was immobilized in chitosan matrix to obtain a novel hybrid sorbent (CSNi) for U(VI) adsorption. The CSNi showed high affinity for U(VI) sorption, with the inner-sphere complexation as the main mechanism. The maximum mono-layer adsorption capacity for U(VI) at 298 K reached 164.2 mg/g. The U(VI) sorption was endothermic and spontaneous, and kinetically followed the pseudo-second-order model. These findings highlight the possibility of using CSNi for efficient removal of U(VI) from wastewater. |
| Databáze: | OpenAIRE |
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