Extraction chromatographic studies of uranium(VI) with crosslinked poly(acrylic acid) coated on silica gel
| Main Authors: | Bhabatosh Mandai, Pranesh Chowdhury, Susanta K. Pandit |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 2008
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5820255 |
Daftar Isi:
- Analytical Laboratory, Department of Chemistry, Visva-Bharati, Santiniketan-731 235, West Bengal, India E-mail: bhabatosh_mandal@yahoo.co.in Manuscript received /6 October 2007, revised 12 May 2008, accepted 25 June 2008 A selective method has been developed for extraction and separation of UVI with the chemically synthesized high molecular mass crosslinked poly(acrylic acid) coated on silanized silica gel. The coated materials act as a stationary phase for the extraction chromatographic studies. The structure and thermal stability of crosslinked poly(acrylic acid) has been elucidated with the help of FTIR and TGA. The optimum pH range for quantitative extraction of uranium was found to be 4 to 6. The effects of pH and stripping agent on extraction and elution of UVI have been investigated. Ion exchange and break-through capacity of the exchanger (polymer coated on silanized silica gel) have been determined at room temperature. Surface morphology of the exchanger was studied by SEM. UVI has been separated quantitatively from various synthetic aqueous mixtures containing metal ions (VIV, ThIV, CeIV, PbII , HgII , InIII, FeIII and ZrIV) commonly pre..,ent in uranium ores and fission products. The method permits pre-concentration and sequential separation of UVI from CeVI, ThIV and ZrIV of the same analytical group. A plausible mechanism for uranium ion exchange has been suggested.