Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 74, Issue 2, Pages 195-201Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2010.06.005
Keywords
Reactive red X-3B; Internal micro-electrolysis; Ozone; Synergetic effect
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Funding
- National High Technology Research and Development Program (863 Program) of China [2002AA601300, 2008ZX07317]
- Hubei Provincial Department of Education [Q200717004]
- National Natural Science Foundation of China [50978208]
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Ozone integrated with internal micro-electrolysis (O-3/IE) was applied to electrochemically oxidize reactive red X-3B owing to its well-established synergetic effect in the present study. The final removal rates of color, COD, TOC and AOX were found to be 99%, 85%, 59%, and 74%, respectively, when the following optimal conditions were used: dyestuff concentration of 1 g/L with a pH of 9.0, a reaction temperature of 60 degrees C, 400g of iron scraps with the diameter in the range of 0.9-2.0 mm and 10 g/h ozone flow rate. The dominant degradation mechanism of reactive red X-3B was elucidated by the addition of radical scavenger/enhancer. The results indicated that the formation of hydroxyl radicals in the presence of ozone was the major contributing factor in O-3/IE system. (C) 2010 Elsevier B.V. All rights reserved.
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