Photocatalytic ozonation of dibutyl phthalate over TiO2 film

Li, Laisheng; Zhu, Wanpeng; Chen, Le; Zhang, Pengyi; Chen, Zhongyin

doi:10.1016/j.jphotochem.2005.01.020

Cited by 81 publications

(48 citation statements)

References 23 publications

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“…Despite the non-selective reaction and high oxidation power of . OH, UV/TiO 2 with fiber catalyst was found to be rather a slow process in this investigation, which is consistent with the earlier results with TiO 2 fiber, powder and film catalysts (Beltran, et al, 2005;Li, et al, 2005;Terashima, et al, 2006). Generation and utilization of .…”

Section: Resultssupporting

confidence: 91%

“…Ozonation (O 3 ) and photocatalysis (UV/TiO 2 ) are widely investigated advanced oxidation processes (AOP) for treating contaminated waters (Djebbar and Sehili, 1998;Yao, et al, 1998;Drzewicz, et al, 2004;Singh and Muneer, 2004). Ozonation alone is less effective, since its reaction with organic contaminants is selective (Brillas, et al, 2003;Agustina, et al, 2005;Li, et al, 2005) and generation of free radicals from its decomposition takes place only at elevated pH conditions (Munter, 2001). Oxidation of contaminants in UV/TiO 2 system involves free hydroxyl radical ( .…”

Section: Introductionmentioning

confidence: 99%

“…OH), but separation of TiO 2 catalyst in suspension has been a major obstacle. Although recent developments in TiO 2 film and fiber catalysts can overcome the problem, mere photocatalysis is reported to be less efficient for several organic contaminants (Agustina, et al, 2005;Li, et al, 2005;Terashima, et al, 2006). Photocatalytic ozonation (O 3 /UV/TiO 2 ) is emerging as a more promising oxidation method for refractory organic contaminants due to a large number of .…”

Section: Introductionmentioning

confidence: 99%

“…Photocatalytic ozonation (O 3 /UV/TiO 2 ) is emerging as a more promising oxidation method for refractory organic contaminants due to a large number of . OH generation (Agustina, et al, 2005;Beltran, et al, 2005;Li ,et al, 2005;Farre, et al, 2005). Few literatures are available on the O 3 /UV/TiO 2 process,because its use is relatively new, while successful use of TiO 2 fiber catalyst is expected to be a milestone in practical applications of the UV/TiO 2 and O 3 /UV/TiO 2 processes.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic ozonation of 2, 4-dichlorophenoxyacetic acid in water with a new TiO2 fiber

Giri

Ozaki

Taniguchi

et al. 2007

Int. J. Environ. Sci. Technol.

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More effective techniques are required to mineralize the increasing number of recalcitrant organic contaminants at low concentrations in the water environment using advanced oxidation process. Though relatively new, photocatalytic ozonation (O 3 /UV/TiO 2 ) is considered superior to ozonation (O 3 ) and photocatalysis (UV/TiO 2 ), due to synergistic effects and use of immobilized TiO 2 photocatalysts is a milestone in advance oxidation process. This article aimed to elucidate 2, 4-dichlorophenoxyacetic acid (2, 4-D) mineralization characteristics in low aqueous solutions by O 3 /UV/TiO 2 using the world's first high-strength TiO 2 fiber catalyst in laboratory experiments. 2, 4-D degradation and TOC removal in O 3 , UV/TiO 2 and O 3 /UV/TiO 2 followed pseudo-first order reaction kinetic. The removal rates for 2, 4-D and TOC in O 3 /UV/TiO 2 were respectively about 1.5 and 2.4-fold larger than the summation of the corresponding values in O 3 and UV/TiO 2 . The O 3 /UV/TiO 2 process was characterized by short-lived few aromatic intermediates, faster degradations of aliphatic intermediates and dechlorination as a major step in 2, 4-D mineralization. The significantly enhanced 2, 4-D mineralization in the process was attributed to increased ozone decomposition and reduced electron-hole recombination on TiO 2 surface resulting to a large number of . OH generation. The O 3 /UV/TiO 2 process with the TiO 2 fiber catalyst was very promising with respect to the major challenges being faced in AOP involving TiO 2 , namely separation of powder catalyst in suspension and reduced efficiency of immobilized catalysts (e.g. TiO 2 film/fiber).

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Photocatalytic ozonation of 2, 4-dichlorophenoxyacetic acid in water with a new TiO2 fiber

Giri

Ozaki

Taniguchi

et al. 2007

Int. J. Environ. Sci. Technol.

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“…Literatures describe a number of methods for removing DBP from the environment such as microbial degradation (Chang et al 2009;Chi and Yang 2012;), photo degradation (Ooka et al 2004;Li et al 2005), ozonation (Li et al 2006) and adsorption (Salim et al 2010;Mendez-Diaz et al 2012;Fang and Huang 2009). Adsorption is a term commonly used for several different processes involving physical as well as chemical interactions between the solid surface of a substance and a dissolved material.…”

Section: Introductionmentioning

confidence: 99%

Efficient adsorption of dibutyl phthalate from aqueous solution by activated carbon developed from phoenix leaves

Wang

2014

Int. J. Environ. Sci. Technol.

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The adsorption of dibutyl phthalate (DBP) from aqueous solution using phoenix leaves activated carbon (PLAC) by chemical activation with phosphate was investigated. After scanning electron microscopy, energy dispersive X-ray spectrometry, Brunauer-Emmett-Teller (BET) and infrared spectrum characterization of PLAC, the influences of solution pH, contact time, initial DBP concentration and temperature on the adsorption rate were investigated. The isotherm, kinetic and thermodynamic parameters were explored to describe the experimental data. The PLAC has a heterogeneous distribution of grain and a well-developed porous structure. The main elements of PLAC are 24.26 % carbon, 70.65 % oxygen and 3.75 % phosphor. The BET surface area of the sample is 593.52 m 2 /g with the average pore diameter of 6.31 nm. The single-point total pore volume was found to be 0.52 cm 3 /g. The infrared spectrum showed the complexity of the material. The maximum DBP adsorption rate was 97.36 %, and the maximum adsorption capacity was 48.68 mg/g at pH 13. The monolayer sorption capacity of the biosorbent for DBP was found as 133.33 mg/g with the Langmuir isotherm. The equilibrium data fitted with Freundlich isotherm better than Langmuir, Dubinin-Radushkevich and Temkin isotherm. The kinetic data were best described by the pseudo-second-order model better than pseudo-first-order kinetic, intraparticle diffusion, and Elovich model. The thermodynamic studies indicated that the sorption process spontaneous, thermodynamically favorable and endothermic. The PLAC can be an alternative material for treatment of DBP wastewater.

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Experimental Methods for Investigating Kinetics

Maskill¹,

Santaballa²

2006

The Investigation of Organic Reactions and Their Mechanisms

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Photocatalytic ozonation of dibutyl phthalate over TiO2 film

Cited by 81 publications

References 23 publications

Photocatalytic ozonation of 2, 4-dichlorophenoxyacetic acid in water with a new TiO2 fiber

Photocatalytic ozonation of 2, 4-dichlorophenoxyacetic acid in water with a new TiO2 fiber

Efficient adsorption of dibutyl phthalate from aqueous solution by activated carbon developed from phoenix leaves

Experimental Methods for Investigating Kinetics

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