阴离子交换法从辐照后的Ni靶中分离64Cu

Chemical Separation of 64Cu From Irradiated Ni Target by Anion Exchange Method

  • 摘要: 为实现从质子回旋加速器辐照后的Ni靶中提取64Cu,建立了使用阴离子交换法从Ni靶溶解液中实施64Cu与基体Ni及伴生Co放化分离的工艺。测定了Ni2+、Co2+ 和Cu2+在阴离子交换树脂AG1-X8与盐酸介质之间的静态分配系数Kd。确定了使用阴离子交换树脂柱分离提取64Cu的工艺:首先用6 mol/L盐酸穿透Ni,再用4 mol/L 盐酸洗脱57Co,最后用1 mol/L 盐酸解吸64Cu。64Cu放化回收率为87.5%±3.0%。以丰度99.07%的富集64Ni为靶材,质子轰击后,使用本工艺分离得到的64Cu放射性核纯度大于99.0%,化学杂质Ni、Co和Fe的浓度均小于0.05mg/L。

     

    Abstract: To separate 64Cu from cyclotron irradiated 64Ni target, a radiochemical purification procedure for 64Cu from Ni and Co via anion exchange was developed. Based on the distribution coefficient data of Cu, Ni and Co between AG1-X8 resin and HCl medium, separation of 64Cu from Ni and Co using AG1-X8 anion exchange resin column had been studied with different concentrations of HCl as the eluent. The Ni fraction was eluted by 6 mol/L HCl, and Co fraction by 4 mol/L HCl. 64Cu fraction was washed out and collected in 1 mol/L HCl. Recovery yield of 64Cu was 87.5%±3.0%. The radionuclide purity of 64Cu produced by enriched 64Ni was higher than 99.0% and the concentrations of Ni and Co in the final 64CuCl2 solution were both less than 0.05 mg/L.

     

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