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http://dx.doi.org/10.14481/jkges.2014.15.7.5

A Study on the Synergistic Effects of Hybrid System Simultaneously Irradiating the UV and US  

Lee, Hanuk (Department of Chemistry and Environmental Sciences, Korea Army Academy)
Han, Jonghun (Department of Chemistry and Environmental Sciences, Korea Army Academy)
Yoon, Yeomin (Department of Civil and Environmental Engineering, University of South Carolina)
Lee, Jongyeol (Department of Civil and Environmental Engineering, Hanyang University)
Park, Jaewoo (Beautiful Environmental Construction Co.)
Her, Namguk (Department of Chemistry and Environmental Sciences, Korea Army Academy)
Publication Information
Journal of the Korean GEO-environmental Society / v.15, no.7, 2014 , pp. 5-11 More about this Journal
Abstract
Both ultraviolet (UV) and ultrasound (US) systems are used in degrading of organic contaminants and they can thus be applicable simultaneously as an UV/US hybrid system in attempts further to increase the degradation efficiency. The pseudo-first order degradation rate constants with the UV, US and UV/US hybrid irradiation were 2.60, 10.34, and $14.81{\times}10^{-3}min^{-1}$, respectively. It was observed that the synergistic effect of UV/US hybrid system for degrading the bis (2-ethylhexyl) phthalate (DEHP). The highest rate of DEHP degradation was found during UV/US hybrid irradiation and the synergistic effect factor (SEF) was calculated to be 1.15 based on the pseudo-first order degradation rate constants. Results indicate that synergistic effect of UV/US hybrid system is closely correlated to the enhancement of sonochemical reactivity with the UV-US interaction of increasing the formation rate of OHby providing additional $H_2O_2$ production through the pyrolysis of water molecules during UV/US hybrid irradiation.
Keywords
Ultrasonic; Ultraviolet rays; Hybrid system; Synergistic effect;
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Times Cited By KSCI : 3  (Citation Analysis)
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