Liquid-Liquid Extraction of Actinides from Nitric Acid Feeds Using Two Hexa-n-alkylnitrilotriacetamides

被引：11

作者：

Karak, Ananda ^{[1
,2
]}

Mahanty, Bholanath ^{[3
]}

Mohapatra, Prasanta K. ^{[2
,3
]}

Egberink, Richard J. M. ^{[4
]}

Valsala, T. P. ^{[1
]}

Sathe, D. B. ^{[1
]}

Bhatt, R. B. ^{[1
]}

Huskens, Jurriaan ^{[4
]}

Verboom, Willem ^{[4
]}

机构：

[1] Bhabha Atom Res Ctr, INRPO, FF, Nucl Recycle Board, Tarapur, India

[2] Homi Bhabha Natl Inst, Mumbai 400094, Maharashtra, India

[3] Bhabha Atom Res Ctr, Div Radiochem, Mumbai, Maharashtra, India

[4] Univ Twente, Lab Mol Nanofabricat, MESA Inst Nanotechnol, POB 217, NL-7500 AE Enschede, Netherlands

来源：

SOLVENT EXTRACTION AND ION EXCHANGE | 2022年 / 40卷 / 04期

关键词：

Nitrilotriacetamide; actinides; solvent extraction; separation; 3RD PHASE-FORMATION; TRIVALENT ACTINIDES; SOLVENT-EXTRACTION; MUTUAL SEPARATION; DONOR LIGANDS; COMPLEXATION; DIGLYCOLAMIDE; LANTHANIDES; NTAAMIDE; WASTE;

D O I：

10.1080/07366299.2021.1946999

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Solutions of two nitrilotriacetamide (NTA) ligands, viz., N,N,N',N',N",N"-hexa-n-butylnitrilotriacetamide (HBNTA) and N,N,N',N',N",N"-hexa-n-hexylnitrilotriacetamide (HHNTA) in 20% isodecanol-80% n-dodecane were employed for the extraction of U(VI), Np(IV), Pu(IV), and Am(III) from nitric acid feed solutions. Limitations of ligand solubility and third-phase formation when contacted with nitric acid solutions led to the choice of the diluent composition of 20% isodecanol and 80% n-dodecane. The results of the solvent extraction studies indicated poor extraction of the metal ions with HBNTA as compared to that with HHNTA as the extractant and hence, major part of this work involved HHNTA. Slope analysis suggested extraction of 1:1 (ML) species with Np(IV) and Pu(IV) at 3 M HNO3 and mixed 1:2 (ML2) and 1:3 (ML3) species with U(VI) at pH 2. At 0.5 M HNO3, the observed trend for extraction was Pu(IV) > Np(IV) >> Am(III) > U(VI).

引用

页码：366 / 386

页数：21

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