EXTRACTION OF CERTAIN ACTINIDE AND LANTHANIDE ELEMENTS FROM DIFFERENT ACID-MEDIA BY POLYURETHANE FOAMS LOADED WITH DI(2-ETHYLHEXYL)PHOSPHORIC ACID (HDEHP) .3. EXTRACTION OF U(VI) FROM SULFURIC-ACID-SOLUTIONS BY FOAMS LOADED WITH SOLUTIONS OF HDEHP IN NITROBENZENE

被引：4

作者：

AZIZ, M ^{[1
]}

BEHEIR, SG ^{[1
]}

SHAKIR, K ^{[1
]}

机构：

[1] ATOM ENERGY ESTAB,NUCL RES CTR,DEPT RADIAT PROTECT,CAIRO,EGYPT

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES | 1991年 / 150卷 / 01期

关键词：

D O I：

10.1007/BF02041498

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Except for conditions of low acidity and low ratios of di(2-ethylhexyl)phosphoric acid (HDEHP) to U(VI) the data obtained for the distribution of U(VI) between sulfuric acid solutions and polyurethane foams loaded with solutions of HDEHP in nitrobenzene could be analyzed by the equation: log (4.36 D(u)) = log K + 1.43 log (C(d) - 4C(u))/(C(H))1.4 + log f(u) where the polymerization number of HDEHP is about 2.8, D(u) is the distribution ratio, and f(u) = [UO2(2+)](aq)/[SIGMA-UO2](aq) indicating that the extraction proceeds via the formation of a 1:4 UO2:HDEHP complex. At both low acidity and HDEHP/U(VI) ratio a UO2-HDEHP polymer is formed.

引用

页码：155 / 162

页数：8

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