| Effects of Adding UV and H2O2 on the Degradation of
Pharmaceuticals and Personal Care Products during O3
Treatment |
| Ilho Kim1, Seogku Kim1, Hyundong Lee1†, and Hiroaki Tanaka2 |
1Water Resources & Environment Research Department, Korea Institute of Construction Technology; Department of Construction Environment Engineering, University of Science & Technology, Korea Institute of Construction Technology, Goyang 411-712, Korea
2Research Center for Environmental Quality Management, Kyoto University, Shiga 520-0811, Japan |
Corresponding Author:
Hyundong Lee ,Tel: +82-31-910-0297, Fax: +82-31-910-0291, Email: hdlee@kict.re.kr
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Received: June 22, 2010; Accepted: July 14, 2011. |
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| ABSTRACT |
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The degradation of 30 pharmaceuticals and personal care products (PPCPs) subjected to O3, O3/UV, and O3/H2O2 treatments were
investigated using semi-batch tests and evaluated by their pseudo-first-order rate constants. The additional application of UV or H2O2
during O3 treatment significantly improved the degradation rate of most of the PPCPs. At the same O3 feed rate, O3/UV treatment
exhibited much higher PPCP degradation efficiency than that of O3 treatment. This was probably due to degradation of the PPCPs
by O3, direct UV photodegradation, and OH radicals that formed from the photodegradation of O3 during O3/UV treatment. PPCP
degradation by O3 was also promoted by adding H2O2 during the O3 treatment. However, when the initial H2O2 concentration was high
during O3 treatment, OH radicals were likely to be scavenged by excess H2O2, leading to low PPCP degradation. Therefore, it is important
to determine the appropriate H2O2 dosage during O3 treatment to improve PPCP degradation when adding H2O2 during O3 treatment. |
| Keywords:
O3 | O3/H2O2 | O3/UV | Pharmaceuticals | PPCPs |
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