Characteristic and mechanism of Th4+ sorption from nitric acid solutions by rice and wheat bran
-
Akbar Boveiri Monji
and
Mohammad Hassan Mallah
Abstract
In line with our previously conducted researches, various instrumental methods were applied to evaluate the adsorption features and mechanism of Th4+ from highly acidic solution (4 M HNO3) by rice and wheat bran. Although the results of cation exchange confirmed the existence of ion-exchange interaction in Th4+ adsorption, it had a trivial contribution in the biosorption process. The presence of Th4+ ions on the biomass surface was obviously revealed in SEM images and EDS elemental analysis. Moreover, the linkage of C=O, O–H and N–H functional groups on the biomass surface with Th4+ ions was clearly represented in the ATR-FTIR spectroscopic analysis. Additionally, desorption studies indicated that ammonium oxalate (>81.3%) and ammonium carbonate (>75.4%) were effective in desorbing Th4+ from the biomass surface due to strong interactions of hard functional groups of C=O with Th4+. The overall observations unfold the fact that electrostatic complexation mechanism is dominant between biomass and Th4+ ions.
Acknowledgement
The authors gratefully acknowledge the financial support of Nuclear Science and Technology Research Institute and Iran National Science Foundation (INSF) for the project (Project No. 91005058).
©2015 Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- Frontmatter
- Ground-state and isomeric-state cross sections for the 138Ce(n,2n)137Ce reaction from its threshold to 20 MeV
- Determination of the 151Sm half-life
- Kinetics of reductive stripping of Np(VI) by acetohydroxamic acid from 30%TBP/kerosene to nitrate medium using a high-speed stirred cell
- Characteristic and mechanism of Th4+ sorption from nitric acid solutions by rice and wheat bran
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