AXAD-16-3,4-dihydroxy benzoyl methyl phosphonic acid: a selective preconcentrator for U and Th from acidic waste streams and environmental samples
| Autor: | M.A. Maheswari, M. S. Subramanian |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Thermogravimetric analysis
Polymers and Plastics General Chemical Engineering Ion chromatography chemistry.chemical_element Extraction Actinide extraction Chelating ion-exchange Biochemistry Actinides Metal Matrix (chemical analysis) Organic acids Materials Chemistry Environmental Chemistry Chelation Aromatic polymers Monazite sand Chromatographic analysis Chemistry Acidity Extraction (chemistry) Thorium AXAD-16 General Chemistry pH effects Elemental analysis visual_art visual_art.visual_art_medium Preconcentration Ion exchange Nuclear chemistry |
| Zdroj: | Reactive and Functional Polymers. 62:105-114 |
| ISSN: | 1381-5148 |
| Popis: | A novel chelating ion-exchange extraction Chromatographie technique has been developed using AXAD-16-3,4-dihydroxy benzoyl methyl phosphonic acid, as the stationary phase, for the selective extraction of uranium and thorium. The polymeric stationary phase was characterized by FT-IR spectroscopy, CHNPS elemental analysis and also by thermo gravimetric analysis. Various physio-chemical parameters influencing the quantitative metal ion extraction were optimized by both static and dynamic methods. The most notable feature of the developed resin matrix was its high distribution ratio values both under high acidities and pH conditions. The matrix showed superior metal sorption capacity values of 1.66 and 1.51 mmol g -1 for U(VI) and Th(IV), respectively. Kinetics studies revealed that time duration of |
| Databáze: | OpenAIRE |
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