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A novel cloud-point extraction process for preconcentrating selected polycyclic aromatic hydrocarbons in aqueous solution

Bai, Dongshun, Li, Jingliang, Chen, S. B. and Chen, B. -H. 2001, A novel cloud-point extraction process for preconcentrating selected polycyclic aromatic hydrocarbons in aqueous solution, Environmental science and technology, vol. 35, no. 19, pp. 3936-3940, doi: 10.1021/es0108335.

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Title A novel cloud-point extraction process for preconcentrating selected polycyclic aromatic hydrocarbons in aqueous solution
Author(s) Bai, Dongshun
Li, JingliangORCID iD for Li, Jingliang orcid.org/0000-0003-0709-2246
Chen, S. B.
Chen, B. -H.
Journal name Environmental science and technology
Volume number 35
Issue number 19
Start page 3936
End page 3940
Total pages 5
Publisher American Chemical Society
Place of publication Washington, D. C.
Publication date 2001-10-01
ISSN 0013-936X
1520-5851
Keyword(s) cloud-point extraction (CPE)
Summary A novel but simple cloud-point extraction (CPE) process is developed to preconcentrate the trace of selected polycyclic aromatic hydrocarbons (PAHs) with the use of the readily biodegradable nonionic surfactant Tergitol 15-S-7 as extractant. The concentrations of PAHs, mixtures of naphthalene and phenanthrene as well as pyrene, in the spiked samples were determined with the new CPE process at ambient temperature (23 °C) followed by high performance liquid chromatography (HPLC) with fluorescence detection. More than 80% of phenanthrene and pyrene, respectively, and 96% of naphthalene initially present in the aqueous solutions with concentrations near or below their aqueous solubilities were recovered using this new CPE process. Importantly Tergitol 15-S-7 does not give any fluorometric signal to interfere with fluorescence detection of PAHs in the UV range. No special washing step is, thus, required to remove surfactant before HPLC analyses. Different experimental conditions were studied. The optimum conditions for the preconcentration and determi nation of these selected PAHs at ambient temperature have been established as the following:  (1) 3 wt % surfactant; (2) addition of 0.5 M Na2SO4; (3) 10 min for equilibration time; and (4) 3000 rpm for centrifugal speed with duration of 10 min.
Language eng
DOI 10.1021/es0108335
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
Copyright notice ©2001, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30039338

Document type: Journal Article
Collection: Institute for Frontier Materials
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