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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >AFFINITY OF FINELY DISPERSED MONTMORILLONITE COLLOIDAL PARTICLES FOR AMERICIUM AND LANTHANIDES
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AFFINITY OF FINELY DISPERSED MONTMORILLONITE COLLOIDAL PARTICLES FOR AMERICIUM AND LANTHANIDES

机译：细分散的蒙脱土胶体颗粒对和镧的亲和力

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摘要

We studied (i) the affinity of the finely dispersed montmorillonite colloidal particles (< 0.45 mu m), which originated from Japan, for trace amounts of Am3+ and lanthanide ions (Ln(3+): Nd3+, Eu3+, Gd3+), and (ii) the differences between the sorption behavior of Am3+ and Ln(3+) onto the colloidal particles and that onto the massive montmorillonite solids. The ion-exchange stoichiometry of sorption reaction of Am3+ and Ln(3+) onto the colloidal particles was 1:3 in the low Na+ concentration region. In the high Na+ concentration region, the sorption ratio was constant, and specific for Am3+ and each Ln(3+). The influence of Na+ and Ca2+ on the sorption of Ln(3+) onto the finely dispersed Na- and Ca-montmorillonite colloidal particles at different NaCl and CaCl2 concentrations was examined. It was found that the coverage of the sorption sites increased with the Ln(3+) concentration. The affinity for Ln(3+) was discussed by selectivity and a Langmuir-type isotherm. [References: 21]
机译：我们研究了（i）来自日本的细分散的蒙脱石胶体颗粒（<0.45μm）对痕量的Am3 +和镧系元素离子（Ln（3+）：Nd3 +，Eu3 +，Gd3 +）和（ ii）Am3 +和Ln（3+）在胶体颗粒上和块状蒙脱石固体上的吸附行为之间的差异。在低Na +浓度区域，Am3 +和Ln（3+）在胶体颗粒上的吸附反应的离子交换化学计量比为1：3。在高Na +浓度区域，吸附率是恒定的，并且对Am3 +和每个Ln（3+）都是特定的。在不同的NaCl和CaCl2浓度下，研究了Na +和Ca2 +对Ln（3+）在细分散的Na-和Ca-蒙脱土胶体颗粒上的吸附的影响。发现吸附位置的覆盖率随Ln（3+）浓度的增加而增加。通过选择性和Langmuir型等温线讨论了对Ln（3+）的亲和力。 [参考：21]

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