Advanced oxidation effect of ozonation combined with electrolysis

Kishimoto, Naoyuki; Morita, Yukako; Tsuno, Hiroshi; Oomura, Tomoaki; Mizutani, Hiroshi

doi:10.1016/j.watres.2005.09.001

Cited by 97 publications

(33 citation statements)

References 20 publications

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“…A possible reason, as discussed in BComparison of AC-PTFE, CB-PTFE, and CNTs-PTFE GDCs in ·OH generation,^is that the presence of CNTs in cathode contributed the improvement of ·OH generation in ozone-electrolysis system. This explanation is consistent with the results in previous research, which showed that ·OH was the main responsible for refractory organic compound degradation in ozone-electrolysis process (Kishimoto et al 2005). While ozone oxidizes organic compounds selectively and partly, ·OH is very unselective and reacts at rates that are several orders of magnitude higher than O 3 (Brillas et al 2009).…”

Section: Performance Of Optimized Cnt-based Gdc In Ozone-electrolysissupporting

confidence: 92%

Enhanced hydroxyl radical generation in the combined ozonation and electrolysis process using carbon nanotubes containing gas diffusion cathode

Zhang

et al. 2015

Environ Sci Pollut Res

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Combination of ozone together with electrolysis (ozone-electrolysis) is a promising wastewater treatment technology. This work investigated the potential use of carbon nanotube (CNT)-based gas diffusion cathode (GDC) for ozone-electrolysis process employing hydroxyl radicals (·OH) production as an indicator. Compared with conventional active carbon (AC)-polytetrafluoroethylene (PTFE) and carbon black (CB)-PTFE cathodes, the production of ·OH in the coupled process was improved using CNTs-PTFE GDC. Appropriate addition of acetylene black (AB) and pore-forming agent Na2SO4 could enhance the efficiency of CNTs-PTFE GDC. The optimum GDC composition was obtained by response surface methodology (RSM) analysis and was determined as CNTs 31.2 wt%, PTFE 60.6 wt%, AB 3.5 wt%, and Na2SO4 4.7 wt%. Moreover, the optimized CNT-based GDC exhibited much more effective than traditional Ti and graphite cathodes in Acid Orange 7 (AO7) mineralization and possessed the desirable stability without performance decay after ten times reaction. The comparison tests revealed that peroxone reaction was the main pathway of ·OH production in the present system, and cathodic reduction of ozone could significantly promote ·OH generation. These results suggested that application of CNT-based GDC offers considerable advantages in ozone-electrolysis of organic wastewater.

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Section: Performance Of Optimized Cnt-based Gdc In Ozone-electrolysissupporting

confidence: 92%

Enhanced hydroxyl radical generation in the combined ozonation and electrolysis process using carbon nanotubes containing gas diffusion cathode

Zhang

et al. 2015

Environ Sci Pollut Res

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“…An applicable technology to decompose persistent organic matter such as 1,4-dioxane is the advanced oxidation technology, which is a technology using hydroxyl radical (·OH) as an oxidant. Several types of ozone-based advanced oxidation technologies have been proposed like ozonation with UV irradiation (Peyton and Glaze, 1988), ozonation with the addition of hydrogen peroxide (Nakayama et al, 1979) and ozonation combined with electrolysis (Kishimoto et al, 2005(Kishimoto et al, , 2010a. These processes successfully enhance the oxidation potential of ozone treatment.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Effect of Several Iron Species on Ozonation

Kishimoto

Ueno

2012

J. of Wat. ^|^ Envir. Tech.

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“…The ozone-electrolysis is a new AOP. The advanced oxidation mechanism for ozone-electrolysis was estimated to be as follows (Kishimoto et al, 2005;Kishimoto et al, 2008):…”

Section: Introductionmentioning

confidence: 99%

Treatment of Paper and Pulp Mill Wastewater by Ozonation Combined with Electrolysis

Kishimoto

Nakagawa

Okada

et al. 2010

J. of Wat. & Envir. Tech.

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Ozonation combined with electrolysis (ozone-electrolysis), ozonation alone and electrolysis alone were applied to the treatment of a paper and pulp mill wastewater for the decolorization and removal of chemical oxygen demand (COD). Electrolysis alone was ineffective in treating the paper and pulp mill wastewater. Both ozone-electrolysis and ozonation alone were effective in removing chromaticity, but produced white suspended solids. The production of the solid by ozone-electrolysis was smaller than by ozonation alone. The ozone-electrolysis demonstrated more rapid removal of COD and higher ozone effectivity than the ozonation alone. Furthermore, ozone-electrolysis was the most useful method to transform organic compounds into more oxygenated ones of the three.

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Advanced oxidation effect of ozonation combined with electrolysis

Cited by 97 publications

References 20 publications

Enhanced hydroxyl radical generation in the combined ozonation and electrolysis process using carbon nanotubes containing gas diffusion cathode

Enhanced hydroxyl radical generation in the combined ozonation and electrolysis process using carbon nanotubes containing gas diffusion cathode

Catalytic Effect of Several Iron Species on Ozonation

Treatment of Paper and Pulp Mill Wastewater by Ozonation Combined with Electrolysis

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