Toxic Substances: Photochemistry

Authored by: Puangrat Kajitvichyanukul , Jirapat Ananpattarachai

Encyclopedia of Environmental Management

Print publication date:  December  2012
Online publication date:  December  2012

Print ISBN: 9781439829271
eBook ISBN: 9781351235860
Adobe ISBN:


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Nowadays, there has been a continuously increasing amount of research and development in the area of photochemistry (both heterogeneous and homogeneous) as it becomes an alternative technology for water/wastewater treatment. In this context, homogeneous photo-Fenton reaction and heterogeneous TiO2 photocatalysis are reviewed as they are considered a highly competitive water treatment technology among the advanced oxidation processes (AOPs) for the removal of toxic organic pollutants not treatable by conventional techniques due to high chemical stability and/or low biodegradability. Many toxic substances such as phenol and phenolic compounds, pesticides, and pharmaceuticals are successfully destroyed by these technologies. This entry reviews fundamentals and mechanism, operating parameters, and the applications in water/wastewater treatment. The entry also summarizes the optimum conditions in treating each toxic chemical by photo-Fenton and TiO2 photocatalysis. The next challenge in technology development is included as well.

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