`Radioneuclide sorption onto low-cost mineral adsorbent’.
IR@AMPRI: CSIR-Advanced Materials and Processes Research Institute, Bhopal
View Archive Info| Field | Value | |
| Title |
`Radioneuclide sorption onto low-cost mineral adsorbent’.
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| Creator |
Murari, Prasad
Sona, Saxena |
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| Subject |
Environmental Studies/Chemistry
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| Description |
This paper investigates the underlying mechanism of the removal of hexavalent uranium radionuclides from aqueous solution via a low-cost mineral adsorbent. Batch adsorption studies were performed for the concentration range of 50−4000 mg/L. The effects of contact times in the range of 10−3600 min (60 h), solution pHs in the range of 1−11, initial concentrations of metal ions in the range of 50−4000 mg/L, and interfering cations (such as Pb2+, Cu2+, Fe2+, Cd2+, Ni2+, Th4+, Ca2+, Na+, and K+) and interfering anions (such as SO4-, CO3-, NO3-, and Cl-) were studied by equilibrating different concentrations of uranium solutions. Pseudo-first-order and pseudo-second-order rate expressions have been used to test the experimental data. The rate constants of adsorption for both the kinetic models have been calculated. The pseudo-second-order rate reaction provides the best correlation of the data. The values of adsorption data were fitted to Freundlich, Langmuir, and Dubinin−Radushkorich (D−R) adsorption isotherms. The mean energy of adsorption was calculated to be 10.10 kJ/mol from the D−R adsorption isotherm. The probable mechanism of radionuclide removal was its dissolution, followed by subsequent precipitation. X-ray diffractograms of the radionuclide-sorbed mineral adsorbent indicates the precipitation of new compound at a higher radionuclide concentration (>100 mg/L).
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| Publisher |
American Chemical Society, Washington, DC, ETATS-UNIS (1987) (Revue)
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| Date |
2006
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| Type |
Article
PeerReviewed |
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| Identifier |
Murari, Prasad and Sona, Saxena (2006) `Radioneuclide sorption onto low-cost mineral adsorbent’. Ind. Eng. Chem. Res., 45. pp. 9122-9128. ISSN 0888-5885
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| Relation |
http://ampri.csircentral.net/176/
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