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Cloud-point extraction of phenanthrene by nonionic surfactants

Li, Jing-Liang and Chen, Bing-Hung 2002, Cloud-point extraction of phenanthrene by nonionic surfactants, Journal of the Chinese institute of chemical engineers, vol. 33, no. 6, pp. 581-589.

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Title Cloud-point extraction of phenanthrene by nonionic surfactants
Author(s) Li, Jing-LiangORCID iD for Li, Jing-Liang orcid.org/0000-0003-0709-2246
Chen, Bing-Hung
Journal name Journal of the Chinese institute of chemical engineers
Volume number 33
Issue number 6
Start page 581
End page 589
Total pages 9
Publisher Taiwan Institute of Chemical Engineering
Place of publication Hsinchu City. Taiwan
Publication date 2002-11
ISSN 0368-1653
Keyword(s) polycyclic aromatic hydrocarbon
phenanthrene
cloud point extraction
nonionic surfactant
HPLC analysis
Summary Extraction and preconcentration of the model polycyclic aromatic hydrocarbon (PAH), phenanthrene, in aqueous solutions by two different kinds of nonionic ethoxylated alcohols, Tergitol 15-S-7 and Neodol 25-7, as extractants was studied at ambient temperature (22°C). Both surfactants have almost the same numbers of hydrocarbons and ethylene-oxide (EO) units, but differ in the location of the alcohols. Neodol 25-7 is a primary alcohol, while Tergitol 15-S-7 is a secondary one. The extraction process is based on the clouding phenomena of these two nonionic surfactants. Addition of sodium sulfate or sodium phosphate could decrease the cloud point temperatures of the surfactant solutions below the ambient temperatures, so that the cloud-point extraction process could be facilitated. Increasing the salt concentration or decreasing the surfactant concentration could improve the preconcentration factor, which is attributable to the decrease in the volume of surfactant-rich phase. Consequently, the recovery efficiency higher than 96% was achieved for phenanthrene in aqueous solution.
Language eng
Field of Research 090703 Environmental Technologies
090409 Wastewater Treatment Processes
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1.1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30039310

Document type: Journal Article
Collection: Institute for Frontier Materials
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