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Photocatalytic decomposition of the sodium dodecylbenzene sulfonate surfactant in aqueous titania suspensions exposed to highly concentrated solar radiation and effects of additives
Zhang, TY; Oyama, T; Horikoshi, S; Zhao, JC; Serpone, N; Hidaka, H
2003-04-15
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
Volume42Issue:1Pages:13-24
AbstractThe sodium dodecylbenzene sulfonate (DBS) surfactant photodegrades in aqueous titanium dioxide (TiO2) dispersions under highly concentrated solar light exposure (ca. 70 suns) via apparent first-order kinetics with accumulated light energy as the experimental variable. The choice of optimal experimental parameters for the photodegradation of DBS with a concentrated solar illumination device is explored: optimal circulation flow rate, 8.31 min(-1); pH, 5.0; and TiO2 loading, 5 g l(-1). Foaming action of the DBS-TiO2 suspension increased with increase in increments of the flow rate. The foam produced at the higher TiO2 loadings exhibited greater stability than in the absence of TiO2. The increase in surface tension is faster than the temporal decrease of the concentration of DBS, which followed the typical. Langmuir-Hinshelwood (LH) model: LH apparent rate constant, k(LH) = 0.184 mM kJ(-1); LH adsorption constant, K-LH = 0.527 mM(-1). The relative photonic efficiency, E,I; against phenol; k(app) of DBS is 0.53. The rate of removal of total organic carbon (TOC) of DBS was improved by a combination of TiO2 loading and added K2S2O8 additive; i.e. at pH 5.0 and TiO2 loading of 0.2 g l(-1), or pH 8.4 and TiO2 loading of 5.0 g l(-1). However, at pH 5.0 and TiO2 loading 5.0 g l(-1), the rate of TOC removal was not enhanced in the presence of K2S2O8 as the oxidizing agent and electron scavenger. The results are explained by contributions from the photochemical oxidation with K2S2O8 and from the K2S2O8-assisted photocatalytic oxidation of DBS. (C) 2002 Elsevier Science B.V. All rights reserved.
KeywordPhotocatalytic Degradation Titanium Dioxide Potassium Persulfate Surfactant Sodium Dodecylbenzene Sulfonate
Indexed BySCI
Language英语
WOS IDWOS:000182337400002
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80732
Collection中国科学院化学研究所
Corresponding AuthorHidaka, H
Affiliation1.Iwaki Meisei Univ, Frontier Res Ctr Global Environm Protect, Hino, Tokyo 1918506, Japan
2.Chinese Acad Sci, Inst Chem, Lab Photochem, Beijing 100080, Peoples R China
3.Concordia Univ, Dept Chem & Biochem, Montreal, PQ H3G 1M8, Canada
Recommended Citation
GB/T 7714
Zhang, TY,Oyama, T,Horikoshi, S,et al. Photocatalytic decomposition of the sodium dodecylbenzene sulfonate surfactant in aqueous titania suspensions exposed to highly concentrated solar radiation and effects of additives[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2003,42(1):13-24.
APA Zhang, TY,Oyama, T,Horikoshi, S,Zhao, JC,Serpone, N,&Hidaka, H.(2003).Photocatalytic decomposition of the sodium dodecylbenzene sulfonate surfactant in aqueous titania suspensions exposed to highly concentrated solar radiation and effects of additives.APPLIED CATALYSIS B-ENVIRONMENTAL,42(1),13-24.
MLA Zhang, TY,et al."Photocatalytic decomposition of the sodium dodecylbenzene sulfonate surfactant in aqueous titania suspensions exposed to highly concentrated solar radiation and effects of additives".APPLIED CATALYSIS B-ENVIRONMENTAL 42.1(2003):13-24.
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