Abstract
References
- Ishikawa Y, Wada I, Fukumoto M (2001). J Environ Pathol Toxicol Oncol 20(4): 311–315.
- Martling U, Mattsson A,Travis L B, Holm L E, Hall P (1999). Radiat Res 151: 293–299.
- VanKaick G, Bahner M L, Liebermann Deta l (1999). Radiologe 39(8): 643–651.
- Tavlarides L L, Bae J H, Lee C K (1987). Separation Science and Technology. 22(2–3): 581–617.
- Singh H, Gupta C K (2000). Miner Proc Extr Metal lRev. 21(1–5): 307–349.
Abstract
In this
paper, the liquid-solid extraction of Thorium (IV) is made by Sodic bentonite
and Magnetic bentonite. Magnetic adsorbent can be quickly separated from a
medium by a simple magnetic process, in view of these properties; some
parameters were studied to assess the performance of maghemite nanocomposite
clay for the removal of Thorium ions. The operating variables studied are
initial La(III) concentration, pH, ionic strength, temperature and contact
time. The time needed for magnetic bentonite to adsorb the maximum of Th (IV)
is 45 minutes and 60 minutes for sodic bentonite. For magnetic bentonite,
optimal extraction yield was achieved in a initial pH equal at 6.2 and for
sodic bentonite, the variation of initial pH has no influence on the extraction
yield. The sorption capacities of sodic bentonite and magnetic bentonite are
41.24 and 31.34 mg.g-1 respectively. Adsorption equilibrium data
were calculated for Langmuir and Freundlich isotherms. It was found that the
sorption of Th (IV) on sodic and magnetic bentonite was better suited to the
Langmuir adsorption model. Thermodynamics data leads to endothermic and spontaneous
process for magnetic bentonite and exothermal for sodic bentonite. The
quantitative elution study of Thorium can be realized with acetic acid for
sodic bentonite and sulfuric acid for magnetic bentonite.
Keywords
References
- Ishikawa Y, Wada I, Fukumoto M (2001). J Environ Pathol Toxicol Oncol 20(4): 311–315.
- Martling U, Mattsson A,Travis L B, Holm L E, Hall P (1999). Radiat Res 151: 293–299.
- VanKaick G, Bahner M L, Liebermann Deta l (1999). Radiologe 39(8): 643–651.
- Tavlarides L L, Bae J H, Lee C K (1987). Separation Science and Technology. 22(2–3): 581–617.
- Singh H, Gupta C K (2000). Miner Proc Extr Metal lRev. 21(1–5): 307–349.
Details
| Journal Section | Articles |
|---|---|
| Authors | |
| Publication Date | June 30, 2017 |
| Published in Issue | Year 2017 Volume: 5 Issue: 1 |
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