DTPA与铀、镎、钚的配位作用 Ⅰ.DTPA与Np(Ⅳ)配合物稳定常数的测定

    • 摘要: 用溶剂萃取法测定了二乙撑三胺五乙酸(DTPA)与Np(Ⅳ)配合物的稳定常数。测定了不同萃取剂、水相酸度、DTPA浓度及体系含与不含铀及其它金属离子等条件下DTPA与Np(Ⅳ)配合物的稳定常数。所测得的lgβ值在29.55—29.75之间,与文献值相符。

       

      Abstract: COMPLEXINGREACTIONSOFDTPAWITHURANIUM,NEPTUNIUMANDPLUTONIUMⅠ.DETERMINATIONOFSTABILITYCONSTANTSOFDTPA-Np(Ⅳ)COMPLEXWuQiulin(InstituteofNuclearEnergyTechnology,TsinghuaUniversity,Beijing102201)ChenShumingLiGuanghong(BeijingInstituteofNuclearEngineering,Beijing100840)ABSTRACTThestabilityconstantsofNp(Ⅳ)complexwithdiethylenetriaminepentaaceticacid(DT-PA)aredeterminedbysolventextractionmethod.ThestabilityconstantsofNp(Ⅳ)complexwithDTPAinsolutionsofvariousacidconcentrations,diferentextractants,diferentcon-centrationsofDTPAanddiferentconcentrationsofuraniumandothermetal-ionsaredeter-mined.Thevaluesoflgβrangefrom29.55to29.75,whichconformtotheliteraturevalues.KeywordsDietylenetriaminepentaaceticacid(DTPA)Np(Ⅳ)ComplexStabili-tyconstant

       

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