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KMID : 1024520110200020231
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Journal of the Environmental Sciences
2011 Volume.20 No. 2 p.231 ~ p.239
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Degradation Characteristic of Endocrine Disruptors (DEP, NP) Using Combined Advanced Oxidation Processes (AOPs)
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Na Seung-Min
An Yoon-Gyung
Choi Myung-Chan
Jo Sang-Hyeon
Kim Ji-Hyung
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Abstract
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Diethyl phthalate (DEP) and nonylphenol (NP) are widely spread in the natural environment as an endocrine disruption chemicals (EDs). Therefore, in this study, ultrasound (US) and ultraviolet (UVC), including TiO2, as advanced oxidation processes (AOPs) were applied to a DEP and NP contaminated solution. When only the application of US, the optimum frequency for significant DEP degradation and a high rate of hydrogen peroxide (H2O2) formation was 283 kHz. We know that the main mechanism of DEP degradation is radical reaction and, NP can be affected by both of radical reaction and pyrolysis through only US (sonolysis) process and combined US+UVC (sonophotolysis) process. At combined AOPs (sonophotolysis/sonophotocatalysis) such as US+UVC and US+UVC+TiO2, significant degradation of DEP and NP were observed. Enhancement effect of sonophotolysis and sonophotocatalysis system of DEP and NP were 1.68/1.38 and 0.99/1.17, respectively. From these results, combined sonophotocatalytic process could be more efficient system to obtain a significant DEP and NP degradation.
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KEYWORD
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Ultrasound(US), Disruption chemicals (EDs), Ultraviolet (UVC), Sonophotolysis, Sonophotocatalysis, Hydroxyl radical
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