Complexation of Actinide(III) and Lanthanide(III) with H4TPAEN for a Separation of Americium from Curium and Lanthanides,Inorganic Chemistry

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Complexation of Actinide(III) and Lanthanide(III) with H4TPAEN for a Separation of Americium from Curium and Lanthanides
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2017-06-30 00:00:00 , DOI: 10.1021/acs.inorgchem.7b00603
Nathalie Boubals ₁ , Christoph Wagner _{2,

3} , Thomas Dumas ₁ , Léa Chanèac ₁ , Gabriel Manie ₁ , Peter Kaufholz ₄ , Cécile Marie ₁ , Petra J. Panak _{2,

3} , Giuseppe Modolo ₄ , Andreas Geist ₃ , Philippe Guilbaud ₁

Affiliation

Previous studies have identified the TPAEN ligand as a potentially appropriate complexing agent in solvent extraction processes for the separation of americium (Am(III)) from the fission products including lanthanide (Ln(III)) and curium (Cm(III)) ions, a challenging issue for advanced nuclear fuel recycling. To get insight into the selectivity of this ligand, the complexation of selected trivalent Ln(III) and actinide (An(III)) cations with TPAEN was investigated in solution. First, the structure and stoichiometry of the TPAEN complex with Am(III) were characterized by extended X-ray absorption fine structure spectroscopy (EXAFS). Then complexation constants and thermodynamics data were acquired for the complexes using different methods: microcalorimetry for the Ln(III) cations, time-resolved laser fluorescence spectroscopy (TRLFS) for Eu(III) and Cm(III), and UV–visible spectroscopy for Nd(III) and Am(III).

中文翻译：

H系元素（III）和镧系元素（III）与H ₄ TPAEN的络合以从Cur和镧系元素中分离A

先前的研究已经确定TPAEN配体在溶剂萃取过程中可能是合适的络合剂，用于从包括镧系元素（Ln（III））和cur（Cm（III））离子的裂变产物中分离a（Am（III）），先进的核燃料回收是一个具有挑战性的问题。为了深入了解该配体的选择性，在溶液中研究了选定的三价Ln（III）和act系元素（An（III））阳离子与TPAEN的络合。首先，通过扩展的X射线吸收精细结构光谱（EXAFS）表征了具有Am（III）的TPAEN配合物的结构和化学计量。然后使用不同的方法获得配合物的络合常数和热力学数据：微量热法测定Ln（III）阳离子，

更新日期：2017-06-30

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