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Efficient removal of caesium ions from aqueous solution using a calix crown ether in ionic liquids: mechanism and radiation effect
Xu, Chao; Yuan, Liyong; Shen, Xinghai; Zhai, Maolin
2010
Source PublicationDALTON TRANSACTIONS
ISSN1477-9226
Volume39Issue:16Pages:3897-3902
AbstractThe removal of radioactive (137)Cs from nuclear waste is of great importance for both the environment and energy saving. Herein, we report a study on the removal of Cs(+) using a calix crown ether bis(2-propyloxy)calix[4]crown-6 (BPC6) in ionic liquids [C(n)mim][NTf(2)], where [C(n)mim](+) is 1-alkyl-3-methylimidazolium and [NTf(2)](-) is bis(trifluoromethylsulfonyl)imide. The BPC6/[C(n)mim][NTf(2)] system is highly efficient in removing Cs(+) from aqueous solution, even at a low concentration of BPC6. HNO(3) and metal ions such as Na(+), Al(3+) in the aqueous phase interfered with the extraction of Cs(+) by competitive interaction with BPC6 and/or salting-out effect. UV analysis confirmed that the extraction of Cs(+) by the BPC6/[C(n)mim][NTf(2)] system involves a dual extraction mechanism, i.e., via exchange of BPC6 center dot Cs(+) complex or Cs(+) by [C(n)mim](+). Irradiation of [C(4)mim][NTf(2)] dramatically decreases Cs(+) partitioning in the ionic liquid phase by the competitive interaction of radiation-generated H(+) with BPC6, while irradiation of BPC6/[C(4)mim][NTf(2)] decreases Cs(+) partitioning more markedly due to the radiolysis of BPC6.
DOI10.1039/b925594j
Indexed BySCI
Language英语
WOS IDWOS:000276377100015
PublisherROYAL SOC CHEMISTRY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/70136
Collection中国科学院化学研究所
Corresponding AuthorShen, Xinghai
AffiliationPeking Univ, Coll Chem & Mol Engn, Dept Appl Chem, BNLMS, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Xu, Chao,Yuan, Liyong,Shen, Xinghai,et al. Efficient removal of caesium ions from aqueous solution using a calix crown ether in ionic liquids: mechanism and radiation effect[J]. DALTON TRANSACTIONS,2010,39(16):3897-3902.
APA Xu, Chao,Yuan, Liyong,Shen, Xinghai,&Zhai, Maolin.(2010).Efficient removal of caesium ions from aqueous solution using a calix crown ether in ionic liquids: mechanism and radiation effect.DALTON TRANSACTIONS,39(16),3897-3902.
MLA Xu, Chao,et al."Efficient removal of caesium ions from aqueous solution using a calix crown ether in ionic liquids: mechanism and radiation effect".DALTON TRANSACTIONS 39.16(2010):3897-3902.
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