Solvent extraction of americium(III) and europium(III) with 2,6-bis(5,6-diethyl-1,2,4-triazin-3-yl) pyridine in ionic liquids: Experimental study and molecular dynamics simulation

doi:10.1016/j.seppur.2017.09.033

	Solvent extraction of americium(III) and europium(III) with 2,6-bis(5,6-diethyl-1,2,4-triazin-3-yl) pyridine in ionic liquids: Experimental study and molecular dynamics simulation
	Tan, Cunmin 1,3,4; Zhang, Xin4 ; Cao, Shiwei 1,3; Li, Sa 1,3,4; Guo, Hangxu 1,3; Tian, Yuan3 ; Chen, Desheng 1,3; Tian, Wei1,3 ; Wang, Lei 2; Qin, Zhi3
刊名	SEPARATION AND PURIFICATION TECHNOLOGY
	2018-02-09
卷号	192 页码:302-308
ISSN号	1383-5866
DOI	10.1016/j.seppur.2017.09.033
英文摘要	The extraction behaviors of Eu(III) and Am(III) from nitric acid medium by 2,6-bis(5,6-diethyl-1,2,4-triazin-3-yl) pyridine (C2-BTP) dissolved in four different room temperature ionic liquids (RTILs), viz. C(2)mim(+) (NTf2-)-N-center dot C(4)mim(+) (NTf2-)-N-center dot, C(6)mim(+) (NTf2-)-N-center dot, C(8)mim(+) (NTf2-)-N-center dot, were investigated under different conditions. The distribution ratios of Am(III) and Eu(III) in C2-BTP/C(n)mim(+) (NTf2-)-N-center dot (n = 2, 4, 6, 8) were measured as a functions of the extraction time and the concentration of nitric acid. It is found that the systems exhibit slow kinetics in extraction, and the distribution ratios for Am(III) and Eu(III) decrease with higher nitric acid concentration. The extraction mechanism is found to be cation-exchange in RTILs, which is different compared to that in molecular diluents. Though higher temperature leads to faster kinetics in the experiment, the equilibrium time still remain over 24 h. However, the distribution ratios for Am(III) are significantly enhanced at higher temperature. From the computational practice, an encouraging conclusion is that the predominant conformer of C2-BTP is greatly changed in RTILs compared with those in gas phase and molecular diluents. It is this transformation that leads to the discrepancy of the extraction behaviors with C2-BTP in molecular diluents or RTILs, and the intermolecular interactions should be well tuned to design a delighting extracting system.
资助项目	National Natural Science Foundation of China[11079006] ; CAS Strategic Priority Research Program[XDA03010402]
WOS关键词	SELECTIVE EXTRACTION ; WAVE-FUNCTION ; COMPLEXATION ; LIGANDS ; SYSTEM ; DIGLYCOLAMIDE ; LANTHANIDES ; VALIDATION ; ACTINIDE ; BEHAVIOR
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000418212500035
资助机构	National Natural Science Foundation of China ; CAS Strategic Priority Research Program
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/47079]
专题	近代物理研究所_实验物理中心
通讯作者	Qin, Zhi
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Sichuan Univ, Coll Chem, Chengdu 610065, Sichuan, Peoples R China 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 4.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Tan, Cunmin,Zhang, Xin,Cao, Shiwei,et al. Solvent extraction of americium(III) and europium(III) with 2,6-bis(5,6-diethyl-1,2,4-triazin-3-yl) pyridine in ionic liquids: Experimental study and molecular dynamics simulation[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2018,192:302-308.
APA	Tan, Cunmin.,Zhang, Xin.,Cao, Shiwei.,Li, Sa.,Guo, Hangxu.,...&Qin, Zhi.(2018).Solvent extraction of americium(III) and europium(III) with 2,6-bis(5,6-diethyl-1,2,4-triazin-3-yl) pyridine in ionic liquids: Experimental study and molecular dynamics simulation.SEPARATION AND PURIFICATION TECHNOLOGY,192,302-308.
MLA	Tan, Cunmin,et al."Solvent extraction of americium(III) and europium(III) with 2,6-bis(5,6-diethyl-1,2,4-triazin-3-yl) pyridine in ionic liquids: Experimental study and molecular dynamics simulation".SEPARATION AND PURIFICATION TECHNOLOGY 192(2018):302-308.