Significant diethyl phthalate (DEP) degradation by combined advanced oxidation process in aqueous solution
- Authors
- Na, Seungmin; Ahn, Yun-Gyong; Cui, Mingcan; Khim, Jeehyeong
- Issue Date
- 30-6월-2012
- Publisher
- ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
- Keywords
- Advanced oxidation processes (AOPs); Diethyl phthalate (DEP); Ultrasound; Ultraviolet; Sonophotocatalysis; Synergistic effect
- Citation
- JOURNAL OF ENVIRONMENTAL MANAGEMENT, v.101, pp.104 - 110
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ENVIRONMENTAL MANAGEMENT
- Volume
- 101
- Start Page
- 104
- End Page
- 110
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/108132
- DOI
- 10.1016/j.jenvman.2012.01.028
- ISSN
- 0301-4797
- Abstract
- Ultrasound (US) combined with ultraviolet (UV) irradiation and a titanium dioxide (TiO2) catalyst was used to effectively remove diethyl phthalate (DEP) from aqueous solutions. Single (sonolysis, photolysis, photocatalysis) and combined (sonophotolysis, sonophotocatalysis) processes were performed to confirm the synergistic effects and DEP degradation mechanism. Using only US, the optimum frequency for DEP degradation was 283 kHz. At this frequency a high rate of hydrogen peroxide (H2O2) formation was observed of approximately 0.32 mM min(-1). The pseudo-first order degradation rate constants were 10(-2)-10(-4) min(-1) depending on the process. Significant degradation and mineralization (TOC) of DEP were observed with the sonophotolytic and sonophotocatalytic processes. Moreover, synergistic effects of 1.29 and 1.95 were exhibited at the sonophotocatalytic and sonophotolytic DEP degradation, respectively. Furthermore, additional advantageous reactions may occur in the heterogeneous sonophotocatalytic process due to interactions between US, UV, and the photocatalyst. (c) 2012 Elsevier Ltd. All rights reserved.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
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