Water/chlorocarbon Winsor I = III = II microemulsion phase behavior with alkyl glucamide surfactants

Article Abstract:

A study of the microemulsification of chlorocarbons that contaminate aquifers reveals that it is possible to generate classical Winsor I = II = III behavior with almost all of the chlorocarbons studied. The anionic surfactants alkyl glucamides-glucamine with either n-heptanoic, n-nonanoic or n-dodecanoic acids as well as the Guerbet version of the dodecanoic acid produced classical Winsor I = II = III phase behavior with chlorinated hydrocarbons that include tetrachloroethylene, carbon tetrachloride, 1,1,1-trichloroethane, trichloroethylene, 1,2-dichlorobenzene, 1,2-dichloroethane, chloroform, methylene chloride and 1,1,2,2-tetrachloroethane.

Solubility, Emulsions, Organochlorine compounds, Organic chlorine compounds

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Determination of alkyl sulfate surfactants in natural waters

Article Abstract:

A gas chromatography technique was developed for alkyl sulfate (AS) analysis and its application in sewage treatment are discussed. A reverse-phase extraction column followed by strong anionic and cationic exchange column cleanup steps are utilized by the method. Isolation and derivatization efficiency determined the performance of the method in measuring AS concentrations in natural water. AS removal exceeded 90 percent in two trickling treatment plants, while AS was not detected in the receiving streams monitor.

Methods, Water quality management, Water chemistry, Gas chromatography

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New approach for estimating alcohol partition coefficients between nonaqueous phase liquids and water

Article Abstract:

A new approach proved very useful in estimating the partition coefficients of alcohol tracers partitioning between nonaqueous phase liquid and water. The new approach, which is based on the concept of equivalent alkane carbon number, is more simple and accurate. Furthermore, the approach could be used for a variety of chlorocarbons and mixtures of chlorocarbons and hydrocarbons.

Research and Development in the Physical, Engineering, and Life Sciences, Water Pollution Control R&D, Pollution, Water pollution, Aquifers, Water pollution research

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