Abstract

The mobility of several radionuclides in a soil sample from a potential site in Egypt is examined. The retention of ^152,154Eu (as homologs of ²⁴¹Am), ⁶⁰Co, ¹³⁷Cs, and ⁹⁹Mo in the presence of chelating ligands in the soil sample and without them is studied. Four chelating agents, namely, ethylenediaminetetraacetic acid (EDTA), citric and oxalic acids (as the major degradation products of EDTA), and humic acid are chosen for this purpose. The radionuclide retention on the soil without chelating ligands decreases in the order Co(II) > Eu(III) > Cs(I) > Mo(VI), with K_d equal to 11.38 mL/g for ⁹⁹Mo and 1088 mL/g for ^152,154Eu. The chelating ligands had little influence on the sorption of ⁶⁰Co and ¹³⁷Cs, but significantly decreased the retention of ^152,154Eu owing to complexation. The soil sample on the potential nuclear site can act as a material for trapping the released radionuclides.

中文翻译：

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核设施选址中土壤中某些放射性核素的保留

摘要

检查了来自埃及潜在地点的土壤样品中几种放射性核素的迁移率。研究了在螯合配体存在和不存在的情况下，土壤中^152,154 Eu（²⁴¹ Am的同系物），⁶⁰ Co，¹³⁷ Cs和⁹⁹ Mo的保留。为此选择了四种螯合剂，即乙二胺四乙酸（EDTA），柠檬酸和草酸（作为EDTA的主要降解产物）和腐殖酸。没有螯合配体的土壤中的放射性核素保留量按Co（II）> Eu（III）> Cs（I）> Mo（VI）的顺序降低，对于⁹⁹ Mo和1088 mL / g ，K _d等于11.38 mL / g为^152,154欧洲联盟。螯合配体对⁶⁰ Co和¹³⁷ Cs的吸附几乎没有影响，但由于络合作用，显着降低了^152,154 Eu的保留。潜在核位置上的土壤样品可以充当捕获释放的放射性核素的材料。