Application of H-titanate nanofibers for degradation of Congo Red in an annular slurry photoreactor

Meng Nan Chong; Bo Jin; H. Y. Zhu; C. W.K. Chow; Chris Saint

doi:10.1016/j.cej.2008.12.002

Application of H-titanate nanofibers for degradation of Congo Red in an annular slurry photoreactor

Meng Nan Chong, Bo Jin, H. Y. Zhu, C. W.K. Chow, Chris Saint

Research output: Contribution to journal › Article › Research › peer-review

67 Citations (Scopus)

Abstract

Anatase nanofibers (TiO₂-N) were synthesized as photocatalyst for the application in an annular slurry photoreactor (ASP). The unique properties of TiO₂-N have facilitated its high reactivity and suitability for water treatment. The influence of operational variables: TiO₂-N loading, pH, aeration rate and dye concentration on the photo-degradation kinetics and efficiency to remove a model compound of Congo Red (CR) were investigated. The photo-degradation kinetics of CR followed the Langmuir-Hinshelwood regime at lower pH. The Langmuir adsorption constant, K_L-H was determined as 7.695 × 10² dm³ mol^-1. The optimal photo-degradation rate of 3.47 × 10^-2 mol dm^-3 min^-1 was achieved at 60 ppm CR, pH 3, aeration rate of 5 dm³ min^-1 and TiO₂-N loading of 4 g dm^-3. Batch settling tests based on Kynch's theory revealed that the TiO₂-N photocatalysts could produce a settling velocity of 8.38 × 10^-4 ms^-1. It was expected that these novel TiO₂-N particles can deliver a true engineering solution as an industrial process for photocatalytic water treatment. Crown

Original language	English
Pages (from-to)	49-54
Number of pages	6
Journal	Chemical Engineering Journal
Volume	150
Issue number	1
DOIs	https://doi.org/10.1016/j.cej.2008.12.002
Publication status	Published - 15 Jul 2009
Externally published	Yes

Keywords

Annular reactor
Congo Red
Degradation
Nanofibers
Photocatalysis
TiO

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10.1016/j.cej.2008.12.002

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title = "Application of H-titanate nanofibers for degradation of Congo Red in an annular slurry photoreactor",

abstract = "Anatase nanofibers (TiO2-N) were synthesized as photocatalyst for the application in an annular slurry photoreactor (ASP). The unique properties of TiO2-N have facilitated its high reactivity and suitability for water treatment. The influence of operational variables: TiO2-N loading, pH, aeration rate and dye concentration on the photo-degradation kinetics and efficiency to remove a model compound of Congo Red (CR) were investigated. The photo-degradation kinetics of CR followed the Langmuir-Hinshelwood regime at lower pH. The Langmuir adsorption constant, KL-H was determined as 7.695 × 102 dm3 mol-1. The optimal photo-degradation rate of 3.47 × 10-2 mol dm-3 min-1 was achieved at 60 ppm CR, pH 3, aeration rate of 5 dm3 min-1 and TiO2-N loading of 4 g dm-3. Batch settling tests based on Kynch's theory revealed that the TiO2-N photocatalysts could produce a settling velocity of 8.38 × 10-4 ms-1. It was expected that these novel TiO2-N particles can deliver a true engineering solution as an industrial process for photocatalytic water treatment. Crown",

keywords = "Annular reactor, Congo Red, Degradation, Nanofibers, Photocatalysis, TiO",

author = "Chong, {Meng Nan} and Bo Jin and Zhu, {H. Y.} and Chow, {C. W.K.} and Chris Saint",

note = "Funding Information: The authors would like to thank their Honour students Ruofei Yee and Zhongde Lim for their technical assistances. This work was supported by the Australian Research Council Linkage grant (LP0562153) and the Australian Water Quality Centre, SA Water Corporation, through the Water Environmental Biotechnology Laboratory (WEBL) at the University of Adelaide. Copyright: Copyright 2009 Elsevier B.V., All rights reserved.",

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doi = "10.1016/j.cej.2008.12.002",

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T1 - Application of H-titanate nanofibers for degradation of Congo Red in an annular slurry photoreactor

AU - Chong, Meng Nan

AU - Jin, Bo

AU - Zhu, H. Y.

AU - Chow, C. W.K.

AU - Saint, Chris

N1 - Funding Information: The authors would like to thank their Honour students Ruofei Yee and Zhongde Lim for their technical assistances. This work was supported by the Australian Research Council Linkage grant (LP0562153) and the Australian Water Quality Centre, SA Water Corporation, through the Water Environmental Biotechnology Laboratory (WEBL) at the University of Adelaide. Copyright: Copyright 2009 Elsevier B.V., All rights reserved.

PY - 2009/7/15

Y1 - 2009/7/15

N2 - Anatase nanofibers (TiO2-N) were synthesized as photocatalyst for the application in an annular slurry photoreactor (ASP). The unique properties of TiO2-N have facilitated its high reactivity and suitability for water treatment. The influence of operational variables: TiO2-N loading, pH, aeration rate and dye concentration on the photo-degradation kinetics and efficiency to remove a model compound of Congo Red (CR) were investigated. The photo-degradation kinetics of CR followed the Langmuir-Hinshelwood regime at lower pH. The Langmuir adsorption constant, KL-H was determined as 7.695 × 102 dm3 mol-1. The optimal photo-degradation rate of 3.47 × 10-2 mol dm-3 min-1 was achieved at 60 ppm CR, pH 3, aeration rate of 5 dm3 min-1 and TiO2-N loading of 4 g dm-3. Batch settling tests based on Kynch's theory revealed that the TiO2-N photocatalysts could produce a settling velocity of 8.38 × 10-4 ms-1. It was expected that these novel TiO2-N particles can deliver a true engineering solution as an industrial process for photocatalytic water treatment. Crown

AB - Anatase nanofibers (TiO2-N) were synthesized as photocatalyst for the application in an annular slurry photoreactor (ASP). The unique properties of TiO2-N have facilitated its high reactivity and suitability for water treatment. The influence of operational variables: TiO2-N loading, pH, aeration rate and dye concentration on the photo-degradation kinetics and efficiency to remove a model compound of Congo Red (CR) were investigated. The photo-degradation kinetics of CR followed the Langmuir-Hinshelwood regime at lower pH. The Langmuir adsorption constant, KL-H was determined as 7.695 × 102 dm3 mol-1. The optimal photo-degradation rate of 3.47 × 10-2 mol dm-3 min-1 was achieved at 60 ppm CR, pH 3, aeration rate of 5 dm3 min-1 and TiO2-N loading of 4 g dm-3. Batch settling tests based on Kynch's theory revealed that the TiO2-N photocatalysts could produce a settling velocity of 8.38 × 10-4 ms-1. It was expected that these novel TiO2-N particles can deliver a true engineering solution as an industrial process for photocatalytic water treatment. Crown

KW - Annular reactor

KW - Congo Red

KW - Degradation

KW - Nanofibers

KW - Photocatalysis

KW - TiO

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JO - Chemical Engineering Journal

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ER -

Application of H-titanate nanofibers for degradation of Congo Red in an annular slurry photoreactor

Abstract

Keywords

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