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Sonophotolytic diethyl phthalate (DEP) degradation with UVC or VUV irradiation.
Ultrason Sonochem. 2012 Sep; 19(5):1094-8.US

Abstract

This study investigated the degradation of diethyl phthalate (DEP) by sonolytic, photolytic and sonophotolytic processes. Two types of UV lamps, UVC (254 nm) and VUV (185 nm+254 nm), were combined with ultrasound (283 kHz). The pseudo-first order degradation rate constants were in the order of 10(-1)-10(-3) min(-1) depending on the processes. The sonolytic DEP degradation rate increased with increasing applied power. Photolytic or sonophotolytic degradation of DEP when using a VUV lamp appeared to be effective because the photo ІІ (UVC/VUV) resulted in a significantly faster degradation than the photo І (UVC) processes due to the higher photon energy and higher hydroxyl radical generation by homolysis of water by VUV. Significant degradation and mineralization (TOC) of DEP were observed with the combined sonophotolytic processes. Moreover, synergistic effects of 1.68 and 1.23 were exhibited at DEP degradation of the sonophoto I and sonophoto II processes, respectively. This was attributed to the UV-induced dissociation of hydrogen peroxide (H(2)O(2)) generated by the application of US to hydroxyl radicals. Therefore, US in sonophotolytic processes can play an important role in enhancing DEP degradation. Moreover, the sonophoto ІІ process is more effective on the mineralization and biodegradability of DEP.

Authors+Show Affiliations

School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, Republic of Korea.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

22464797

Citation

Na, Seungmin, et al. "Sonophotolytic Diethyl Phthalate (DEP) Degradation With UVC or VUV Irradiation." Ultrasonics Sonochemistry, vol. 19, no. 5, 2012, pp. 1094-8.
Na S, Jinhua C, Cui M, et al. Sonophotolytic diethyl phthalate (DEP) degradation with UVC or VUV irradiation. Ultrason Sonochem. 2012;19(5):1094-8.
Na, S., Jinhua, C., Cui, M., & Khim, J. (2012). Sonophotolytic diethyl phthalate (DEP) degradation with UVC or VUV irradiation. Ultrasonics Sonochemistry, 19(5), 1094-8. https://doi.org/10.1016/j.ultsonch.2011.10.004
Na S, et al. Sonophotolytic Diethyl Phthalate (DEP) Degradation With UVC or VUV Irradiation. Ultrason Sonochem. 2012;19(5):1094-8. PubMed PMID: 22464797.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sonophotolytic diethyl phthalate (DEP) degradation with UVC or VUV irradiation. AU - Na,Seungmin, AU - Jinhua,Cai, AU - Cui,Mingcan, AU - Khim,Jeehyeong, Y1 - 2011/10/28/ PY - 2011/06/24/received PY - 2011/09/26/revised PY - 2011/10/05/accepted PY - 2012/4/3/entrez PY - 2012/4/3/pubmed PY - 2012/9/28/medline SP - 1094 EP - 8 JF - Ultrasonics sonochemistry JO - Ultrason Sonochem VL - 19 IS - 5 N2 - This study investigated the degradation of diethyl phthalate (DEP) by sonolytic, photolytic and sonophotolytic processes. Two types of UV lamps, UVC (254 nm) and VUV (185 nm+254 nm), were combined with ultrasound (283 kHz). The pseudo-first order degradation rate constants were in the order of 10(-1)-10(-3) min(-1) depending on the processes. The sonolytic DEP degradation rate increased with increasing applied power. Photolytic or sonophotolytic degradation of DEP when using a VUV lamp appeared to be effective because the photo ІІ (UVC/VUV) resulted in a significantly faster degradation than the photo І (UVC) processes due to the higher photon energy and higher hydroxyl radical generation by homolysis of water by VUV. Significant degradation and mineralization (TOC) of DEP were observed with the combined sonophotolytic processes. Moreover, synergistic effects of 1.68 and 1.23 were exhibited at DEP degradation of the sonophoto I and sonophoto II processes, respectively. This was attributed to the UV-induced dissociation of hydrogen peroxide (H(2)O(2)) generated by the application of US to hydroxyl radicals. Therefore, US in sonophotolytic processes can play an important role in enhancing DEP degradation. Moreover, the sonophoto ІІ process is more effective on the mineralization and biodegradability of DEP. SN - 1873-2828 UR - https://www.unboundmedicine.com/medline/citation/22464797/Sonophotolytic_diethyl_phthalate__DEP__degradation_with_UVC_or_VUV_irradiation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1350-4177(11)00207-0 DB - PRIME DP - Unbound Medicine ER -
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