Adsorption behavior and mechanism of isobutyl-BTP/SiO2-P adsorbent for Am(III) and Ln(III) in nitrate solution

作者：Wang, Xinpeng; Ning, Shunyan; Zou, Qing; Liu, Ruiqin; Wei, Yuezhou^*

来源：Journal of Radioanalytical and Nuclear Chemistry, 2016, 307(3): 2001-2008.

DOI：10.1007/s10967-015-4635-y

• HLLW
• Minor actinides
• isobutyl-BTP/SiO2-P adsorbent
• Separation
• Adsorption mechanism
• EXAFS

Porous isobutyl-BTP/SiO2-P adorbent was prepared to separate MA(III) from HLLW. The adsorption behavior of isobutyl-BTP/SiO2-P toward Am-241(III), Y(III) and Ln(III) in 0.01 M HNO3-NaNO3 solution was studied. Isobutyl-BTP/SiO2-P showed high adsorption selectivity toward Am-241(III) over Y(III) and Ln(III) fission products. Adsorption kinetics of Dy(III) followed pseudo-second-order rate equation, and its adsorption isotherm matched the Langmuir isotherm equation well. Moreover, the adsorption product of Dy(III) on isobutyl-BTP/SiO2-P was studied using extended X-ray absorption fine structure (EAXFS) method and Dy(isobutyl-BTP/SiO2-P)(3) (3+) was supposed as the main adsorption species.

• 出版日期2016-3
• 单位上海交通大学