| Autor: |
Liu, Meichen, Wang, Zheng, Wang, Ling, Zhang, Xiaofei, Li, Junwan |
| Zdroj: |
Emerging Materials Research; June 2024, Vol. 1 Issue: 1 p1-13, 13p |
| Abstrakt: |
In this study, a novel pretreatment material was developed for the separation of trace plutonium in complex systems. Glass fiber filters, known for their resistance to chemical corrosion, radiation, and thermal stability, were used as the base material for separation and enrichment. However, the number of active groups on the surface of the matrix material was limited, resulting in poor chemical grafting efficiency. To address this, a new method was proposed involving the deposition and chemical grafting. A polydopamine coating was formed on the filter’s surface through the oxidation and self-polymerization reaction of dopamine. Subsequently, the coupling agent chloromethyltrimethoxysilane and the extraction agent trioctylamine were employed to quaternize the glass fiber filter, resulting in the synthesis of a novel pretreatment material. Various characterization techniques were employed to investigate the morphology and surface functional group structure. Finally, the material was applied in the adsorption of trace plutonium and the adsorption performance and mechanism for Pu (IV) were explored. The adsorption results indicated that when the nitrate acidity was 4 mol·L−1, the adsorption capacity of the material reaches its maximum value. The adsorption capacity reached equilibrium within 360 seconds. The maximum adsorption capacity of GF-PD-CTS-TOA for Pu (IV) was 20.35 mg·g−1(0.085 mmol·g−1). Complex anions Pu(NO3)62−and Pu(NO3)5−were the main forms of Pu (IV) adsorption. This is the first time this method has been used to modify glass fiber filters and this study represents the first application of functionalized glass fiber filters in the analysis and separation of radioactive elements during reprocessing. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
