二氯苯基二硫代膦酸萃取Am~(3+)和三价镧系元素的研究

STUDY ON EXTRACTION BEHAVIORS OF Am~(3+) AND Ln~(3+) BY DICHLOROPHENYLDITHIOPHOSPHINIC ACID

摘要: 研究了二氯苯基二硫代膦酸 (DCPDTPI)对示踪量Am3+ 和Eu3+ 的萃取。实验结果表明 ,此萃取剂优先萃取Am3+ ,当萃取剂浓度为 0 1mol/L ,pH =2 73时 ,最大的分离因数β(Am3+ /Eu3+ ) max=8。用ICP MS法同时测定了DCPDTPI对除钷以外的所有镧系元素的萃取分配比 ,并计算了Am3+ 与这些元素的分离因数

Abstract: The extraction behaviors of trace amount of Am 3+ and Eu 3+ by dichlorophenyldithiophosphinic acid are studied. The maximum value of β (Am 3+ /Eu 3+ ) is 8 at pH=2 73 and c (DCPDTPI) =0 1 mol/L. The distribution ratioes of Ln 3+ (except Pm 3+ ) using the same extractant are investigated by the ICP MS and the separation factors between Am 3+ and Ln 3+ are figured out.