Ozone direct oxidation kinetics of Cationic Red X-GRL in aqueous solution
This study characterizes the ozonation of the azo dye Cationic Red X-GRL in the presence of TBA (tert-butyl alcohol), a scavenger of hydroxyl radical, in a bubble column reactor. Effects of oxygen flow rate, temperature, initial dye concentration, and pH were investigated through a series of batch tests. Generally, enhancing oxygen flow rate enhanced the removal of dye. However, there was a minimum removal of dye at temperature 298 K. Increasing or decreasing temperature enhanced the degradation of dye. Increasing the initial dye concentration decreased the removal of dye while the ozonation rate increased. The rate constants and the kinetic regime of the reaction between ozone and dye were obtained by fitting the experimental data to a kinetics model based on a second order overall reaction, first order with respect to both ozone and dye. The Hatta numbers of the reactions were between 0.039 and 0.083, which indicated that the reaction occurred in the liquid bulk. The direct oxidation rate constant k(D) was correlated with temperature by a modified Arrhenius Equation with an activation energy E(a) of 15.538 kJ mol(-1).
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
2006 |
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| Erschienen: |
2006 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:137 |
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| Enthalten in: |
Journal of hazardous materials - 137(2006), 3 vom: 11. Okt., Seite 1859-65 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Zhao, Weirong [VerfasserIn] |
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| Themen: |
66H7ZZK23N |
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| Anmerkungen: |
Date Completed 26.01.2007 Date Revised 21.11.2013 published: Print-Electronic Citation Status MEDLINE |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM163632324 |
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| 041 | |a eng | ||
| 100 | 1 | |a Zhao, Weirong |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Ozone direct oxidation kinetics of Cationic Red X-GRL in aqueous solution |
| 264 | 1 | |c 2006 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ohne Hilfsmittel zu benutzen |b n |2 rdamedia | ||
| 338 | |a Band |b nc |2 rdacarrier | ||
| 500 | |a Date Completed 26.01.2007 | ||
| 500 | |a Date Revised 21.11.2013 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a This study characterizes the ozonation of the azo dye Cationic Red X-GRL in the presence of TBA (tert-butyl alcohol), a scavenger of hydroxyl radical, in a bubble column reactor. Effects of oxygen flow rate, temperature, initial dye concentration, and pH were investigated through a series of batch tests. Generally, enhancing oxygen flow rate enhanced the removal of dye. However, there was a minimum removal of dye at temperature 298 K. Increasing or decreasing temperature enhanced the degradation of dye. Increasing the initial dye concentration decreased the removal of dye while the ozonation rate increased. The rate constants and the kinetic regime of the reaction between ozone and dye were obtained by fitting the experimental data to a kinetics model based on a second order overall reaction, first order with respect to both ozone and dye. The Hatta numbers of the reactions were between 0.039 and 0.083, which indicated that the reaction occurred in the liquid bulk. The direct oxidation rate constant k(D) was correlated with temperature by a modified Arrhenius Equation with an activation energy E(a) of 15.538 kJ mol(-1) | ||
| 650 | 4 | |a Journal Article | |
| 650 | 7 | |a Azo Compounds |2 NLM | |
| 650 | 7 | |a Cations |2 NLM | |
| 650 | 7 | |a Red X-GRL |2 NLM | |
| 650 | 7 | |a Solutions |2 NLM | |
| 650 | 7 | |a Ozone |2 NLM | |
| 650 | 7 | |a 66H7ZZK23N |2 NLM | |
| 700 | 1 | |a Wu, Zhongbiao |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Dahui |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Journal of hazardous materials |d 1998 |g 137(2006), 3 vom: 11. Okt., Seite 1859-65 |w (DE-627)NLM093662688 |x 1873-3336 |7 nnns |
| 773 | 1 | 8 | |g volume:137 |g year:2006 |g number:3 |g day:11 |g month:10 |g pages:1859-65 |
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