Photodegradation of water pollutants

The enormous number of chemical substrates that have already been subjected to photodegradation experiments in water with or without auxiliary oxidants or photocatalysts (Fig. 5-17) includes inorganic ions and molecules, e.g. free and 

Substrate/source of water AOP Change of analytical parameter Rrference 

4-Dihydroxybenzoic acid Ti02-VlS -Absorbance, -DOC Benoit-Marquie et al. (1997) 

Acetone H2O2-UV -[Substrate], -TOC, -t[Ox] Stefan et al. (1996), Stefan and Bolton (1999) 

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M.M. Halmann, Photodegradation of Water Pollutants (CRC Press Inc., Boca Raton, Florida, 1996). 

Halmann MM (1996) Photodegradation of water pollutants. CRC, Boca Raton, FL... 

Halmann mm (1996) Photodegradation of Water Pollutants, CRC Press, Boca Raton. Hoffmann MR, Martin ST, Choi W, Bah-NEMANN DW (1995) Environmental Applications of Semiconductor Photocatalysis, Chem. Rev. 95 69-96. 

Safarzadeh Amiri, A., Bolton, J. R., Cater, S. R., Ferrioxalate mediated Photodegradation of Organic Pollutants in Contaminated Water, Water Res. 1997, 31, 787 798. 

Valladares J., 1995, A new photocatalytic reactor forthe photodegradation of organic pollutants in water. Ph.D. Dii. sertation, University of Western Ontario, London, Ontario, Ca. 

Muszkat, L., Halmann, M., Raucher, D., Bir, L. (1992) Solar photodegradation of xenobiotic contaminants in polluted well water. J. Photochem. Photobiol. A Chem. 65, 409—417. 

Photosensitization for the removal of certain pollutants in photolytic processes can contribute significantly to the degradation rate. Thus, Simmons and Zepp [88] observed increases of up to 26 times of the photodegradation rates of nitroaromatic compounds due to the action of natural or commercial humic substances with solar irradiation. In another work [89], the herbicide 4-chloro-2-methylphenoxyacetic acid (MCPA) was irradiated in water with 300 nm light in the presence of different photosensitizers. This compound, which does not photolyze directly at this wavelength, could be degraded more than 95% in 5 hr when riboflavin was used as photosensitizer. 

Hermann, R., Gerke, J. and Ziechmann, W. (1997) Photodegradation of the surfactants Na-dodecylbenzenesulfonate and dodecylpyridinium-chloride as affected by humic substances. Water Air Soil Pollut. 98,43-55... 

Dunlop, P.S.M., Byrne, J.A., Manga, N. and Eggins, B.R. (2002) The photocatalytic removal of bacterial pollutants from drinking water. J. Photochem. Photobiol. A Chem. 148, 355-363. Epling, G.A. and Lin, C. (2002) Investigation of retardation effects on the titanium dioxide photodegradation system. Chemosphere 46, 937-944. 

Bolton )R, Cater SR (1994) Homogeneous Photodegradation of Pollutants in Contaminated Water An Introduction, in Aquatic and Surface Photochemistry, Helz G R (ed.), Lewis Publishers, Boca Raton, pp 467-490. 

Bolton JR, Cater SR (1994) Homogeneous Photodegradation of Pollutants in Contaminated Water An Introduction, in ... 

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