Effective adsorption of U(VI) from aqueous solution using magnetic chitosan nanoparticles grafted with maleic anhydride: equilibrium, kinetic and thermodynamic studies
| Autor: | Zhirong Liu, Zhao Li, Hamza Shehzad, Quanshui Chen, Adesoji A. Adesina, Limin Zhou, Yun Wang |
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| Rok vydání: | 2017 |
| Předmět: |
Health
Toxicology and Mutagenesis 02 engineering and technology 010403 inorganic & nuclear chemistry 01 natural sciences Endothermic process Analytical Chemistry Chitosan chemistry.chemical_compound symbols.namesake Adsorption Radiology Nuclear Medicine and imaging Carboxylate Spectroscopy Aqueous solution Public Health Environmental and Occupational Health Langmuir adsorption model Maleic anhydride Sorption 021001 nanoscience & nanotechnology Pollution 0104 chemical sciences Nuclear Energy and Engineering chemistry symbols 0210 nano-technology Nuclear chemistry |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 315:195-206 |
| ISSN: | 1588-2780 0236-5731 |
| Popis: | The in situ formed magnetite nanoparticles was encapsulated by maleated chitosan to synthesize a novel magnetic chitosan nano-sorbent (MCN-MA) for the effective sorption of uranium. The sorption kinetics could be described by the pseudo-second-order model, whereas the sorption isotherms could be fitted to the Langmuir model (q m = 187.9 mg/g). The MCN-MA showed higher U(VI) sorption capacities (compared to MCN) due to high affinity of carboxylate groups introduced from grafting maleic anhydride. Thermodynamic parameters indicate that U(VI) sorption is endothermic and feasible. The nano-size and magnetic property of the MCN-MA allow its efficient U(VI) sorption and facile magnetic separation from wastewaters. |
| Databáze: | OpenAIRE |
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