Extraction and separation of thorium(IV) and uranium(VI) with 4-oxaheptanediamide into ionic liquid system from aqueous solution

被引：8

作者：

Ren, Peng ^{[1
]}

Li, Yang ^{[1
]}

Wang, Zhifen ^{[1
]}

Geng, Yanxia ^{[1
]}

Yu, Tao ^{[1
]}

Hua, Rong ^{[1
]}

机构：

[1] East China Univ Technol, State Key Lab Breeding Base Nucl Resources & Envi, Nanchang 330013, Jiangxi, Peoples R China

来源：

CHEMICAL PAPERS | 2020年 / 74卷 / 07期

基金：

中国国家自然科学基金;

关键词：

DMDOHA; Thorium(IV); Uranium(VI); Separation; Extraction mechanism; SOLVENT-EXTRACTION; RARE-EARTHS; METAL-IONS; RECOVERY; U(VI); EU3+;

D O I：

10.1007/s11696-019-01044-w

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Thorium is much more abundant than uranium in nature and has become one of the important potential energy sources in the future. It is because that a thorium-232(Th-232) nucleus has the ability to produce a uranium-233(U-233) nucleus by absorbing a neutron. The aim of this paper is to investigate the extraction and separation of thorium ions and uranyl ions from aqueous solution with N,N'-dimethyl-N,N'-dioctyl-4-oxaheptanediamide (DMDOHA) into ionic liquids of 1-methyl-3-butylimid-azolium bis(trifluoromethanesulfonyl)imide ([C(4)mim][NTf2]). The results show that the extractant DMDOHA has a good affinity toward thorium ions than uranyl ions in the present system, the maximum value of separation factor SFTh(IV)/U(VI) is 21.9 at pH 2.24. The extraction process of thorium ions and uranyl ions was confirmed to proceed by cation-exchange extraction mechanism. The DMDOHA extractant formed a major 3:1 complex with thorium ion and a major 2:1 complex with uranyl ion based on the relationship between log[DMDOHA] with logD.

引用

页码：2049 / 2057

页数：9

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