אסיף מאגר המחקר החקלאי

Solar photodegradation of xenobiotic contaminants in polluted well water

Year:

1992

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Authors :

Volume :

65

Co-Authors:

Muszkat, L., Department of Pesticide Chemistry, Volcani Center, Bet Dagan, 50250, Israel
Halmann, M., Department of Environmental Sciences and Energy Research, Weizmann Institute of Science, Rehovot, 76100, Israel
Raucher, D., Department of Pesticide Chemistry, Volcani Center, Bet Dagan, 50250, Israel
Bir, L., Department of Pesticide Chemistry, Volcani Center, Bet Dagan, 50250, Israel

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Abstract:

The photodegradation of xenobiotic contaminants in water samples taken from a heavily polluted well was studied using three photocatalytic treatments: TiO2 and H2O2 (TI), Fe3+ and H2O2 (T2) and TiO2, Fe3+ and H2O2 (T3). The water samples were concentrated by solvent extraction and analyzed by gas chromatograhy-mass spectrometry (GC-MS). The pollutants examined included a wide range of aliphatic and aromatic halogenated compounds, various types of herbicides, such as triazines, acetamides, bromouracil, halogenated hydroxy benzonitriles and urea herbicides, and also several groups of industrial organics, most of which were found to undergo photodegradation to less than 0.1 ppb. In a test of the time were appreciably degraded within 3.5 h by natural sunlight, but more complete detoxification required longer exposures. Long-chain fatty acid derivatives and phthalate esters were quite resistant to all three treatment methods. © 1992.

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