Comparative Spectroscopic Studies on Flotation Rate of Low Toxic Mixed Solvents

Yanmin Hou* and Xiaojun Zhao

School of Chemistry and Chemical Engineering, Pingdingshan University, Henan 467000, P.R. China

*Corresponding author: Fax: +86 375 2657600; Tel: +86 375 2657620; E-mail:


The application of hydrophilic mixed solvents provides a new direction for the study of green air flotation technology. In this test, a mixture of n-propanol and anhydrous ethanol (4:1) was selected as solvent, sodium chloride as phase separator, sodium hydroxide solution was used to maintain acidity and hydrophobic associations formed by Fe(III) and doxycycline were flotated to the organic phase. After flotation, the hydrophobic associations were analyzed by spectrophotometry and high performance liquid chromatography. The results showed that the hydrophilic mixed solvent maintained good flotation rate without toxicity.


Hydrophilic mixed solvent, Doxycycline, Flotation.

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