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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 7, No. 2, 2010, pp. 251-260
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Bioline Code: st10025
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 7, No. 2, 2010, pp. 251-260
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Degradation of common pharmaceuticals and personal care products in mixed solutions by advanced oxidation techniques
Giri, R. R.; Ozaki, H.; Ota, S.; Takanami, R. & Taniguchi, S.
Abstract
Widespread detection of pharmaceutical compounds in water environment has been a serious concern
recently, while conventional sewage treatments are ineffective for their elimination. But, advanced oxidation techniques
are very promising to remove varieties of organic contaminants in water. This research aims to elucidate oxidation
potentials of sixteen commonly used pharmaceutical compounds in mixed solutions by seven advanced oxidation
techniques in laboratory batch experiments. The removal profiles exhibited four distinct patterns: a) easily degradable
by all seven techniques, b) not easily degradable by all seven techniques, c) easily degradable by ozone-based techniques,
but not by ultraviolet radiation-based techniques and d) easily degradable by ultraviolet radiation-based techniques,
but not by ozone-based techniques. Ozone-based techniques rather than ultraviolet radiation-based techniques were
very powerful for simultaneous removal of the compounds efficiently. Moreover, ozonation combined with ultraviolet
radiation was the most appropriate technique for simultaneous removal of the tested compounds efficiently. Increased
ozone dissolution and decomposition with ozone-based techniques did not always enhance the compounds’ removal.
Physicochemical properties of the compounds and solution pH also presumably played an important role on the
removal which merits further attention.
Keywords
Degradation rate; Hydroxyl radical; Ozone-based methods; Photodegradation; Ultra violet based methods
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