Preliminary kinetic study on the degradation of nitrobenzene by modified ceramic honeycomb-catalytic ozonation in aqueous solution

Zhao, Lei; Sun, Zheng; Zhai, Xuedong

doi:10.1016/j.jhazmat.2008.04.045

Cited by 38 publications

(13 citation statements)

References 22 publications

(36 reference statements)

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“…Catalyzed ozonation by metal oxides is regarded as an alternative method of AOPs because the enhancement of ozone decomposition by the catalyst and the generation of radical species such as • OH. The kinetics of catalyzed ozonation is assumed to be second-order or pseudo-first-order, which have been reported in several previous studies [23,24]. In this investigation, the degradation rate of MIB in both ozonation and catalyzed ozonation in the presence of HAO or RAO could be expressed as follows:…”

Section: Catalyzed Ozonation Of Mib In Water By Aluminum (Hydroxyl) Omentioning

confidence: 73%

Mechanism investigation of catalyzed ozonation of 2-methylisoborneol in drinking water over aluminum (hydroxyl) oxides: Role of surface hydroxyl group

Chen

et al. 2010

Chemical Engineering Journal

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Section: Catalyzed Ozonation Of Mib In Water By Aluminum (Hydroxyl) Omentioning

confidence: 73%

Mechanism investigation of catalyzed ozonation of 2-methylisoborneol in drinking water over aluminum (hydroxyl) oxides: Role of surface hydroxyl group

Chen

et al. 2010

Chemical Engineering Journal

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“…On one hand, it provides a high specific surface area where both organic compounds and ozone can be adsorbed and reacted on it. On the other hand, it promotes the formation of highly oxidant species (•OH), capable of transforming the organic matter into CO 2 [32]. Moreover, the greatest TOC removal rate was obtained in the presence of Mn/AC.…”

Section: Ozonation Of Phenolmentioning

confidence: 99%

Comparison of catalytic ozonation of phenol by activated carbon and manganese-supported activated carbon prepared from brewing yeast

Jeong

Won

et al. 2010

Korean J. Chem. Eng.

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Activated carbon (AC) was prepared using brewing yeast as precursor by chemical activation and manganese was supported on activated carbon (Mn/AC) by adsorption-activation method. The characterizations of prepared AC and Mn/AC and their performance as ozonation catalysts was tested. The results indicated that the crystalline phase of supported manganese was MnO. The total BET surface areas of prepared AC and Mn/AC were found to be 1603.0 m 2 /g and 598.9 m 2 /g, with total pore volumes of 1.43 and 0.49 cm 3 /g, respectively. The average pore diameters of AC and Mn/AC were found to be 3.5 nm and 3.3 nm. Adsorption capacities of phenol onto the produced AC and Mn/AC were determined by batch test, at 25 o C and pH 7. Langmuir and Freundlich isotherm models were used to fit the isotherm experimental data, and the Langmuir isotherm model fitted these two adsorption systems well. The maximum uptakes of phenol by AC and Mn/AC were estimated to be 513.5 mg/g and 128.2 mg/g. The presence of AC prepared from brewing yeast was advantageous for TOC reduction of phenol solution compared with single ozonation, and the greatest TOC removal efficiency was obtained in the presence of Mn/AC. All ozonation reactions followed the pseudofirst-order kinetics model well, the degradation rate of phenol was enhanced in the presence of catalysts, and the more pronounced degradation rate was achieved in O 3 /Mn/AC system. The rate constants were determined to be 2.16×10 −2 min −1 for O 3 alone, 5.70×10 −2 min −1 for O 3 /AC and 6.82×10 −2 min −1 for O 3 /Mn/AC.

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“…(1)-(4)), an increased amount of O 3 in the [42] indicated an increase of COD removal with an increase of inlet O 3 flow rate in a catalytic ozonation on activated carbon. Another explanation for the linear relationship between O 3 dosage and formaldehyde degradation might be the increase of turbulence in suspension with the increase of ozone-containing gas flow rate to the reactor, and in turn improved diffusion and mass transfer of O 3 to liquid phase [43,44], which results in better performance. As for MgO and H 2 O 2 , the optimum dosage of O 3 in the O 3 /MgO/H 2 O 2 process depends on the nature and concentration of the contaminant(s), on the required degree of performance and on the reaction conditions.…”

Section: Effect Of O 3 Dosage On the O 3 /Mgo/h 2 O 2 Processmentioning

confidence: 99%

The removal of formaldehyde from concentrated synthetic wastewater using O3/MgO/H2O2 process integrated with the biological treatment

Moussavi

Yazdanbakhsh

Heidarizad

2009

Journal of Hazardous Materials

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Preliminary kinetic study on the degradation of nitrobenzene by modified ceramic honeycomb-catalytic ozonation in aqueous solution

Cited by 38 publications

References 22 publications

Mechanism investigation of catalyzed ozonation of 2-methylisoborneol in drinking water over aluminum (hydroxyl) oxides: Role of surface hydroxyl group

Mechanism investigation of catalyzed ozonation of 2-methylisoborneol in drinking water over aluminum (hydroxyl) oxides: Role of surface hydroxyl group

Comparison of catalytic ozonation of phenol by activated carbon and manganese-supported activated carbon prepared from brewing yeast

The removal of formaldehyde from concentrated synthetic wastewater using O3/MgO/H2O2 process integrated with the biological treatment

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