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Ion-exchange properties and mobility of Cu~(2+) ions in zirconium hydrophosphate ion exchangers

机译:氢磷酸锆离子交换剂中Cu〜(2+)离子的离子交换性质和迁移率

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摘要

Three types of inorganic ion exchangers based on zirconium hydrophosphate were synthesised using the following methods: (I) phosphatising of dried zirconium hydroxide gel;(II) phosphatising of makeup zirconium hydroxide gel;(III) mixing together of ZrOCl_2 and H_3PO_4 solutions.The influence of synthesis conditions on exchange and kinetic properties of ion exchangers were analysed.It was found that the maximal molar P:Zr ratio in ion exchanger can be reached using method (II).Copper ion mobility in ion exchangers increases with increasing P:Zr ratio.The effective diffusion coefficients of Cu~(2+),which were obtained by kinetic methods at pH 2.5 reaches 1.8 x 10~(-13) to 7.7 x 10~(-13) m~2 s~(-1).
机译:使用以下方法合成了三种类型的基于磷酸氢锆的无机离子交换剂:(I)干燥的氢氧化锆凝胶的磷酸化;(II)氢氧化锆补充凝胶的磷酸化;(III)ZrOCl_2和H_3PO_4溶液混合在一起。分析了合成条件对离子交换剂交换和动力学性能的影响,发现使用方法(II)可以达到离子交换剂的最大摩尔P:Zr比值。铜离子迁移率随P:Zr比值的增加而增加通过动力学方法在pH 2.5下获得的Cu〜(2+)的有效扩散系数达到1.8 x 10〜(-13)至7.7 x 10〜(-13)m〜2 s〜(-1)。

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