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Sonophotolytic degradation of dimethyl phthalate without catalyst: analysis of the synergistic effect and modeling.
Water Res. 2013 Apr 15; 47(6):1996-2004.WR

Abstract

The merits of the combined process of high-frequency ultrasound (US) and catalyst-free ultraviolet irradiation (UV) have been evaluated in this study by investigating the sonophotolytic degradation of dimethyl phthalate (DMP). A 400 kHz ultrasonic system and a photolytic system at 253.7 nm were employed individually, sequentially and simultaneously to examine the details of the processes. High UV intensities and low pH conditions enhanced the sonophotolytic degradation of DMP and a clear synergy was evident from the combination of the US and UV irradiation with a synergetic index of 2.6. The role of ultrasonically generated hydrogen peroxide was examined qualitatively and quantitatively, and its generation and photo-decomposition were found to be the principal reason for the process synergy. A novel inverted S-curve model was developed and found to successfully describe the process of sonophotolysis and DMP degradation.

Authors+Show Affiliations

Department of Civil and Structural Engineering, Research Centre for Urban Environmental Technology and Management, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23395311

Citation

Xu, L J., et al. "Sonophotolytic Degradation of Dimethyl Phthalate Without Catalyst: Analysis of the Synergistic Effect and Modeling." Water Research, vol. 47, no. 6, 2013, pp. 1996-2004.
Xu LJ, Chu W, Graham N. Sonophotolytic degradation of dimethyl phthalate without catalyst: analysis of the synergistic effect and modeling. Water Res. 2013;47(6):1996-2004.
Xu, L. J., Chu, W., & Graham, N. (2013). Sonophotolytic degradation of dimethyl phthalate without catalyst: analysis of the synergistic effect and modeling. Water Research, 47(6), 1996-2004. https://doi.org/10.1016/j.watres.2013.01.015
Xu LJ, Chu W, Graham N. Sonophotolytic Degradation of Dimethyl Phthalate Without Catalyst: Analysis of the Synergistic Effect and Modeling. Water Res. 2013 Apr 15;47(6):1996-2004. PubMed PMID: 23395311.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sonophotolytic degradation of dimethyl phthalate without catalyst: analysis of the synergistic effect and modeling. AU - Xu,L J, AU - Chu,W, AU - Graham,Nigel, Y1 - 2013/01/22/ PY - 2012/10/10/received PY - 2012/12/13/revised PY - 2013/01/06/accepted PY - 2013/2/12/entrez PY - 2013/2/12/pubmed PY - 2013/8/29/medline SP - 1996 EP - 2004 JF - Water research JO - Water Res VL - 47 IS - 6 N2 - The merits of the combined process of high-frequency ultrasound (US) and catalyst-free ultraviolet irradiation (UV) have been evaluated in this study by investigating the sonophotolytic degradation of dimethyl phthalate (DMP). A 400 kHz ultrasonic system and a photolytic system at 253.7 nm were employed individually, sequentially and simultaneously to examine the details of the processes. High UV intensities and low pH conditions enhanced the sonophotolytic degradation of DMP and a clear synergy was evident from the combination of the US and UV irradiation with a synergetic index of 2.6. The role of ultrasonically generated hydrogen peroxide was examined qualitatively and quantitatively, and its generation and photo-decomposition were found to be the principal reason for the process synergy. A novel inverted S-curve model was developed and found to successfully describe the process of sonophotolysis and DMP degradation. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/23395311/Sonophotolytic_degradation_of_dimethyl_phthalate_without_catalyst:_analysis_of_the_synergistic_effect_and_modeling_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(13)00032-8 DB - PRIME DP - Unbound Medicine ER -