TiO2-photocatalyzed oxidative degradation of CH3CN, CH3OH, C2HCL3, and CH2Cl2 supplied as vapors and in aqueous solution under similar conditions

Article Abstract:

Photocatalytic reactions between oxygen and organic compounds in aqueous environments have been widely studied because of their potential for use in the purification of water. New literature on photocatalytic reactions focus on the role of titanium dioxide as catalyst in the oxidative degradation of pollutants widely present in natural waters including acetonitrile, methanol, trichloroethylene and methylene chloride. Batch reactor experiments demonstrating these reactions are presented.

Research, Organic compounds, Titanium dioxide, Chemical reactions

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Sorption phenomena of nicotine and ehtenylpyridine vapors on different materials in a test chamber

Article Abstract:

Nicotine is subject to sorption phenomena in indoor environments which is generally recognised as a limitation to its use as a marker for environmental tobacco smoke (ETS). An empirical description of these phenomena is advanced, and are compared to those exhibited by a well-accepted ETS gas-phase marker, ethenylpyridine. The adsorption of both compounds onto various surfaces, glass, cotton and nylon fabrics was studied through dynamic experiments in a 1-m3 gas chamber.

Switzerland, Science & research, Tobacco farms, Tobacco, Tobacco Farming, Pollution, Tobacco industry

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Effects of temperature and relative humidity on the sorption of organic vapors on quartz sand

Article Abstract:

A study involving vapor sorption to air-dried surfaces is discussed. Seventeen volatile and semivolatile organic compounds on quartz sand were measured by a chromatographic method at different relative humidities and temperature. Heat of sorption and the corresponding heat of condensation for each substance were compared. Results indicate the applicability of certain aspects of air-dried quatz vapor sorption to other polar, organic sorbents.

Gases, Gas absorption, Gas adsorption, Sand, Sands, Temperature, Water vapor, Atmospheric, Atmospheric water

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