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Abstract
The kinetics of TBBPA degradation by ozonation in semi-batch reactor was studied. The reaction rate constants of TBBPA with O3 and •OH were measured by means of direct ozone attack and competition kinetics, and the values of which were 6.10 l/(mol•s), 4.8×109 l/(mol•s), respectively. Results of kinetic studies showed that TBBPA degradation by ozonation under the different conditions tested followed the pseudo-first-order. The values of apparent rate constant of TBBPA degradation increased with the increase of ozone dosage and pH, but decreased with the increase of initial TBBPA concentration.
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Tokumura M, Katoh T, Ohata H, Kawase Y. Dynamic Modeling and Simulation of Ozonation in a Semibatch Bubble Column Reactor: Decolorization and Mineralization of Azo Dye Orange II by Ozone. Ind Eng Chem Res 2009. [DOI: 10.1021/ie802009j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Masahiro Tokumura
- Research Center for Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama 350-8585, Japan
| | - Takashi Katoh
- Research Center for Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama 350-8585, Japan
| | - Hiroki Ohata
- Research Center for Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama 350-8585, Japan
| | - Yoshinori Kawase
- Research Center for Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama 350-8585, Japan
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Chiu CY, Chen YH, Huang YH. Removal of naphthalene in Brij 30-containing solution by ozonation using rotating packed bed. JOURNAL OF HAZARDOUS MATERIALS 2007; 147:732-7. [PMID: 17316988 DOI: 10.1016/j.jhazmat.2007.01.068] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2006] [Revised: 01/16/2007] [Accepted: 01/16/2007] [Indexed: 05/14/2023]
Abstract
The removal efficiency of polycyclic aromatic hydrocarbons (PAHs) by ozonation using a rotating packed bed (RPB) in the surfactant-containing solution is studied. As an ozonation process starts, the ozone-containing gas is introduced and transferred into to the solution. The target PAHs in the solution would be then eliminated via both the gas stripping and ozonation decomposition. The RPB, which provides high gravitational force by adjusting the rotational speed, is employed as a novel ozone contactor. The naphthalene (NAP) and Brij 30 are chosen as the model pollutant and surfactant. Note that the experiments with different concentrations of NAP, Brij 30, and inlet gas ozone are performed for the further investigation. The residual NAP, effluent dissolved oxygen and ozone, and off-gas ozone concentrations are simultaneously monitored. As a result, the removal of NAP in the RPB is remarkably efficient compared with the convectional contactors because of its greater mass transfer coefficient. Moreover, the removal efficiency of NAP is found significantly dependent on the concentrations of NAP, Brij 30, and inlet gas ozone. It takes about several minutes to reach the steady state under the conditions of this study. In addition, it suggests employing RPBs as ozone contacting devices for the high removal efficiency of NAP. Consequently, the present study is useful for the practicable understanding of application of RPBs for the ozonation of PAHs in surfactant-containing solution.
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Affiliation(s)
- Chun-Yu Chiu
- Department of Safety, Health, and Environmental Engineering, Lan-Yang Institute of Technology, I-Lan 261, Taiwan.
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Chen YH, Chiu CY, Chang CY, Huang YH, Yu YH, Chiang PC, Shie JL, Chiou CS. Modeling Ozonation Process with Pollutant in a Rotating Packed Bed. Ind Eng Chem Res 2004. [DOI: 10.1021/ie0401657] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Y. H. Chen
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan, Department of Environmental Engineering, Lan-Yang Institute of Technology, I-Lan 261, Taiwan, and Department of Environmental Engineering, National I-Lan University, I-Lan 260, Taiwan
| | - C. Y. Chiu
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan, Department of Environmental Engineering, Lan-Yang Institute of Technology, I-Lan 261, Taiwan, and Department of Environmental Engineering, National I-Lan University, I-Lan 260, Taiwan
| | - C. Y. Chang
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan, Department of Environmental Engineering, Lan-Yang Institute of Technology, I-Lan 261, Taiwan, and Department of Environmental Engineering, National I-Lan University, I-Lan 260, Taiwan
| | - Y. H. Huang
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan, Department of Environmental Engineering, Lan-Yang Institute of Technology, I-Lan 261, Taiwan, and Department of Environmental Engineering, National I-Lan University, I-Lan 260, Taiwan
| | - Y. H. Yu
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan, Department of Environmental Engineering, Lan-Yang Institute of Technology, I-Lan 261, Taiwan, and Department of Environmental Engineering, National I-Lan University, I-Lan 260, Taiwan
| | - P. C. Chiang
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan, Department of Environmental Engineering, Lan-Yang Institute of Technology, I-Lan 261, Taiwan, and Department of Environmental Engineering, National I-Lan University, I-Lan 260, Taiwan
| | - J. L. Shie
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan, Department of Environmental Engineering, Lan-Yang Institute of Technology, I-Lan 261, Taiwan, and Department of Environmental Engineering, National I-Lan University, I-Lan 260, Taiwan
| | - C. S. Chiou
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan, Department of Environmental Engineering, Lan-Yang Institute of Technology, I-Lan 261, Taiwan, and Department of Environmental Engineering, National I-Lan University, I-Lan 260, Taiwan
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