【摘 要】
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Group separation of actinides over lanthanides is extremely challenging in spent nuclear reprocessing.Traditional extractant tributyl phosphate(TBP)used in PUREX process can efficiently extract uraniu
【机 构】
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Key Laboratory of Nuclear Radiation and Nuclear Energy Technology and Key Laboratory For Biomedical
论文部分内容阅读
Group separation of actinides over lanthanides is extremely challenging in spent nuclear reprocessing.Traditional extractant tributyl phosphate(TBP)used in PUREX process can efficiently extract uranium(Ⅵ)and plutonium(Ⅳ),whereas it has no extractability towards trivalent minor actinides(MA).In recent years,nitrogen atom-containing soft donors such as 2,6-bis(5,6-dialkyl-1,2,4-triazin-3-yl)pyridine(R-BTP),2,6-bis(5,6-dialkyl-1,2,4-triazin-3-yl)-2,2-bipyridine(R-BTBP),and 2,9-bis-(5,6-dialkyl-1,2,4-triazin-3-yl)-1,10-phenanthroline(R-BTPhen)ligands have been considered as successful representatives for the separation of Ln(Ⅲ)/MA(Ⅲ).Nevertheless,these ligands are not efficient towards uranium(VI)and plutonium(Ⅳ).Hence,it is meaningful to design a versatile ligand which can extract all actinides.After tremendous systematically theoretical works,we successfully found a phenanthrolinebased tetradentate ligand with hard soft donors combined in the same molecule,N,N-diethyl-N,N-ditolyl-2,9-diamide-1,10-phenanthroline(Et-Tol-DAPhen),for the group separation of actinides over lanthanides.This ligand exhibits excellent extraction ability and high selectivity toward hexavalent,tetravalent,and trivalent actinides over lanthanides in highly acidic solution.
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