Extraction behaviors of uranyl peroxo cage clusters by mesoporous silica SBA-15
| Autor: | Jennifer E. S. Szymanowski, Yi Liu, Alicia Czarnecki, Ginger E. Sigmon, Peter C. Burns |
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| Rok vydání: | 2016 |
| Předmět: |
Langmuir
Sorbent Health Toxicology and Mutagenesis Diffusion Inorganic chemistry Public Health Environmental and Occupational Health Sorption 010501 environmental sciences Mesoporous silica 010402 general chemistry Uranyl 01 natural sciences Pollution 0104 chemical sciences Analytical Chemistry chemistry.chemical_compound Nuclear Energy and Engineering chemistry Radiology Nuclear Medicine and imaging Freundlich equation Mesoporous material Spectroscopy 0105 earth and related environmental sciences |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 310:453-462 |
| ISSN: | 1588-2780 0236-5731 |
| DOI: | 10.1007/s10967-016-4801-x |
| Popis: | Sorption of soluble uranyl peroxo cage clusters (U60 [UO2(O2)(OH)] 60 60− and U24Pp [(UO2)24(O2)24(P2O7)12]48−) by mesoporous sorbent SBA-15 has been studied. Sorption kinetics of U60 and U24Pp are both best described by a pseudo-second-order model. However, only in the U60 sorption, intraparticle diffusion is the rate-determining step, and both pore size and pore volume of SBA-15 positively influence the U sorption capacity. Sorption isotherms of U60 and U24Pp are better fitted by the Langmuir and Freundlich isotherm models, respectively. The differences of sorption behaviors between two clusters by SBA-15 may result from differences of the sizes and terminal ligands of the clusters. |
| Databáze: | OpenAIRE |
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