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Separation Science and Technology Volume 53, 2018 - Issue 17
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Articles

Solvent extraction of Eu3+ with 4-oxaheptanediamide into ionic liquid system

Yan-Ning NiuDepartment of Teaching and Research, NanJing Forestry University, Huaian, ChinaView further author information
,
Peng RenSchool of Nuclear Science and Engineering, East China University of Technology, Nanchang, ChinaView further author information
,
Fang ZhangRadiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, ChinaView further author information
&
Ze-Yi YanRadiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, ChinaCorrespondence[email protected]
View further author information
Pages 2750-2755 | Received 13 Feb 2018, Accepted 27 Apr 2018, Published online: 18 Jun 2018
 
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ABSTRACT

Liquid–liquid extraction of Eu3+ from aqueous solution with 4-oxaheptanediamides (OHAs) as extractant into room temperature ionic liquids (RTILs) of 1-alkyl-3-methylimidazolium hexafluorophosphate (Cnmim+PF6–, n = 4, 6 and 8) was investigated. The strong affinity of OHAs to Eu3+ was observed in the present Cnmim+PF6– system. The extraction was assumed to proceed by cation-exchange mechanism and formed a 4:1 complex of the OHA extractants and Eu3+ in C4mim+PF6– system. The preferable composition of extracted species was presumed to be Eu(OHA)4(H2O)4(PF6)3 by ESI-MS.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [21471072]

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