Abstract
The resistance of mesoporous silica adsorbents bearing phosphine oxide (SBA-P(O)Pr2) and phosphonic acid (SBA-P(O)(OH)2) to gamma-ray irradiation (in air and 2 mol/L HNO3 solution) was systematically evaluated. The change in the composition, structure and (U(VI)) adsorption ability of the adsorbents was examined. Both the organophosphorus ligands functionalized adsorbents exhibited remarkable durability under gamma-ray irradiation up to a total dose of 5 × 105 Gy. The mesoporous silica framework and the two classes of organophosphorus ligands were well-reserved without irradiation damage. Moreover, after irradiation, the adsorbents still maintained an effective adsorption of U(VI) in high acidic or pH range solutions.
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The study was supported by Program for Changjiang Scholars and Innovative Research Team in University (IRT13026), and National Natural Science Foundation of China under Project Nos. 51103079, 51425403 and 51473087.
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Zhang, W., Ye, G. & Chen, J. Study on the gamma-ray irradiation behavior of mesoporous silica adsorbents functionalized with phosphine oxide and phosphonic acid ligands. J Radioanal Nucl Chem 307, 1445–1451 (2016). https://doi.org/10.1007/s10967-015-4249-4
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DOI: https://doi.org/10.1007/s10967-015-4249-4