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Uptake of radionuclides by metallosilicate ion exchangers

机译:金属硅酸盐离子交换剂吸收放射性核素

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Selective separation of radionuclides from nuclear waste solution is a highly effective method for the minimisation of nuclear waste volumes for final disposal. There are numerous selective inorganic ion exchangers (zeolites, sodium titanates, titanosilicates, hexacyanoferrates) available commercially and the number of their applications in nuclear sites is increasing. Almost all of these exchangers have been developed for the separation of ~(137)Cs and ~(90)Sr, and they often have limited selectivity for other radionuclides. Because separation of ~(137)Cs and ~(90)Sr has been historically the main emphasis in the developmental work, little information is available for the selectivity of inorganic exchangers for other radionuclides. There is an increasing demand especially for the selective removal of activated corrosion product nuclides (e.g. ~(63)Ni, ~(58,60)Co, ~(51)Cr, ~(54)Mn, ~(59)Fe and ~(65)Zn) at nuclear power plants.
机译:从核废料溶液中选择性分离放射性核素是减少最终处置核废料量的高效方法。商业上有许多选择性的无机离子交换剂(沸石,钛酸钠,钛硅酸盐,六氰合铁酸盐),并且它们在核位置的应用数量正在增加。几乎所有这些交换剂都是为分离〜(137)Cs和〜(90)Sr而开发的,它们通常对其他放射性核素的选择性有限。由于〜(137)Cs和〜(90)Sr的分离历来是开发工作的主要重点,因此几乎没有信息可用于无机交换剂对其他放射性核素的选择性。尤其是对于选择性去除活化腐蚀产物核素(例如〜(63)Ni,〜(58,60)Co,〜(51)Cr,〜(54)Mn,〜(59)Fe和〜 (65)Zn)在核电厂。

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