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Separation Science and Technology Volume 52, 2017 - Issue 5
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Extraction of anionic dyes with ionic liquid–nonionic surfactant aqueous two-phase system

Lihong ZhaoSchool of Pharmacy, State Key Laboratory of Microbial Metabolism and Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, Shanghai Jiao Tong University, Shanghai, P.R. ChinaView further author information
,
Xuehong ZhangSchool of Life Science and Biotechnology and State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, P.R. ChinaView further author information
&
Zhilong WangSchool of Pharmacy, State Key Laboratory of Microbial Metabolism and Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, Shanghai Jiao Tong University, Shanghai, P.R. ChinaCorrespondence[email protected]
View further author information
Pages 804-811 | Received 01 Feb 2016, Accepted 28 Nov 2016, Published online: 11 Jan 2017
 
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ABSTRACT

The cloud point of nonionic surfactant (Triton X-114) in ionic liquid ([Bmim]Cl) aqueous solution exhibits as increase and then decrease and increase again with the increase of ionic liquid (IL) content, which is the origin of an IL–nonionic surfactant aqueous two-phase system. The nonionic surfactant-rich phase coexists with a high content of IL aqueous solution phase in the IL–nonionic surfactant aqueous two-phase system. The partitioning of various ionic dyes indicates that anionic species exhibit a high partitioning coefficient between the IL-rich phase and the nonionic surfactant-rich phase.

Funding

The financial support from the National Natural Science Foundation of China (No 21276155) is acknowledged.

Additional information

Funding

The financial support from the National Natural Science Foundation of China (No 21276155) is acknowledged.

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