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Received December 25, 2000,Revised February 15, 2001, Accepted , Available online

Volume 14,2002,Pages 1-6

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This study utilized liquefied gases (LG) as extractant to remove various organic contaminants including halogenated hydrocarbons and phenols as well as aromatic compounds from aqueousmatrices. Orthogonal experiments were performed to optimize theoperating conditions such as temperature, co-solvents and so on.Under favorable conditions, high removal efficiencies can bereadily achieved for a great number of representative model organiccontaminants, the removal efficiencies for most of the hydrophobiccontaminants were greater than 90% in a single extraction stage.Tentative effort was also done for the removal of extractedcontaminants from recycled liquefied gases.

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