Problem associated with the use of TBP for LEM extraction of U(VI) and attempt to overcome this problem using other ligands

被引：7
作者：
Das, Diptendu [1 ]
Juvekar, V. A. [1 ]
Bhattacharya, R. [2 ]
机构：
[1] Indian Inst Technol, Dept Chem Engn, Bombay 400076, Maharashtra, India
[2] Atom Energy Regulatory Board, Bombay, Maharashtra, India
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2015年 / 304卷 / 03期
关键词：
U(VI); TBP; TiAP; TEHP; TOPO; D2EHPA; TOA; Critical time; LEM; LIQUID EMULSION MEMBRANE; URANIUM EXTRACTION; TRIOCTYLPHOSPHINE OXIDE; PHOSPHORIC-ACID; RECOVERY; THORIUM; SYSTEM;
D O I：
10.1007/s10967-014-3918-z
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Suitability of TBP for recovery of uranium(VI) from dilute HNO3 using LEM extraction is investigated. TBP co-extracts significant amount of HNO3 along with U(VI). Beyond a critical time, extraction of U(VI) ceases due to attainment of critical acid level when the strip phase is unable to break TBP-U(VI) complex. The observed critical time is in good agreement with that estimated from rate of acid extraction. Optimal conditions at which the relative extraction of HNO3 is minimal with respect to U(VI) is arrived at. The extraction efficiency of TBP is compared with other ligands viz., TiAP, TEHP, TOPO, TOA and D2EHPA.
引用
收藏
页码：1027 / 1042
页数：16
相关论文
共 19 条
[1]  
Abdelziz Y, 2012, J AM SCI, V8, P1292
[2]   Comparative studies on co-extraction of uranium(VI) and different mineral acid from aqueous feed solutions using TBP, TOPO and TOA [J].
Das, Diptendu ;
Juvekar, V. A. ;
Roy, S. B. ;
Bhattacharya, R. .
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, 2014, 300 (01) :333-343
[3]   Uranium extraction from gattar sulfate leach liquor using aliquat-336 in a liquid emulsion membrane process [J].
El Sayed, MS .
HYDROMETALLURGY, 2003, 68 (1-3) :51-56
[4]   Direct uranium extraction from dihydrate and hemi-dihydrate wet process phosphoric acids by liquid emulsion membrane [J].
El-Hazek, NT ;
El Sayed, MS .
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, 2003, 257 (02) :347-352
[5]   Recovery of uranium from thorium in hydrochloric acid medium by liquid emulsion membranes containing trioctylphosphine oxide [J].
El-Reefy, SA ;
Selim, YT ;
Aly, HF .
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, 1998, 228 (1-2) :21-25
[6]   Equilibrium and kinetic studies on the separation of uranium and thorium from nitric acid medium by liquid emulsion membrane based on trioctylphosphine oxide extractant [J].
ElReefy, SA ;
Selim, YT ;
Aly, HF .
ANALYTICAL SCIENCES, 1997, 13 (03) :333-337
[7]   Uranium extraction enhancement form phosphoric acid by emulsion liquid membrane [J].
Elsayed, H. M. ;
Fouad, E. A. ;
El-Hazek, N. M. T. ;
Khoniem, A. K. .
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, 2013, 298 (03) :1763-1775
[8]   3 PHASE FORMATION IN THE SYSTEM HYDROCHLORIC ACID-WATER-TRI-NORMAL-BUTYL PHOSPHATE-DILUENT [J].
FOA, E ;
ROSINTAL, N ;
MARCUS, Y .
JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1961, 23 (1-2) :109-114
[9]   The uranium(VI) extraction mechanism of D2EHPA-TOPO from a wet process phosphoric acid [J].
Girgin, S ;
Acarkan, N ;
Sirkeci, AA .
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, 2002, 251 (02) :263-271
[10]  
Guo J- X, 1991, HYDROMETALLURGY, V26, P19
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