Adsorption behavior of actinides and some typical fission products by silica/polymer-based isoHex-BTP adsorbent from nitric acid solution
Adsorption behavior of actinides and some typical fission products by silica/polymer-based isoHex-BTP adsorbent from nitric acid solution
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二氧化硅/聚合物基 isoHex-BTP 吸附剂对硝酸溶液中锕系元素和一些典型裂变产物的吸附行为
DOI：
10.1007/s10967-014-3472-8
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发表时间：
2015-01-01
影响因子：
1.6
通讯作者：
Shi, Weiqun
中科院分区：
文献类型：
--
作者：
Liu, Ruiqin;Ning, Shunyan;Shi, Weiqun
制备了基于二氧化硅/聚合物的 isoHex-BTP 吸附剂 (isoHex-BTP/SiO2-P)，用于从 HLLW 中分离 Am(III) 和 Cm(III)。批量吸附结果表明，isoHex-BTP/SiO2-P 在 3 mol dm−3 硝酸中对 Am(III) 和 Pu(IV) 表现出比 U(VI)、Ln(III) 和其他典型裂变产物更高的亲和力和选择性。研究了接触时间、初始 Dy(III) 浓度和温度对 isoHex-BTP/SiO2-P 在 3 mol dm−3 硝酸中吸附 Dy(III) [作为 MA(III) 的模拟元素和 Ln(III) 的代表元素] 的影响。 Dy(III)的吸附符合准二级动力学模型和Langmuir等温线模型。吸附热力学参数表明吸附是一个自发、吸热、熵驱动的过程。
The silica/polymer-based isoHex-BTP adsorbent (isoHex-BTP/SiO2-P) was prepared for partitioning Am(III) and Cm(III) from HLLW. Batch adsorption results showed that isoHex-BTP/SiO2-P exhibited high affinity and selectivity for Am(III) and Pu(IV) over U(VI), Ln(III) and other typical fission products in 3 mol dm−3 nitric acid. The effects of contact time, initial Dy(III) concentration and temperature on the adsorption of Dy(III) [as a simulated element of MA(III) and a representative element of Ln(III)] by isoHex-BTP/SiO2-P in 3 mol dm−3 nitric acid were investigated. The adsorption of Dy(III) fitted well to the pseudo-second-order kinetic model and the Langmuir isotherm model. The adsorption thermodynamic parameters revealed that the adsorption was a spontaneous, endothermic and entropy-driving process.