Influence of Ozone Application Methods on Efficacy of Ozone Decolorization of Pulp Mill Effluents

Mao, Huazhong; Smith, Daniel

doi:10.1080/01919519508547547

Cited by 15 publications

(8 citation statements)

References 22 publications

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“…The application of ozone in wastewater treatment is a well‐known technique and research field 9–12. The mechanism of organic matter oxidation by O 3 has been carefully studied by Hoigné and colleagues 27–29.…”

Section: Principles Of the Aop Methods Employedmentioning

confidence: 99%

“…These processes involve the generation and use of the highly oxidative OH radical (2.8 V vs NHE (Normal Hydrogen Electrode)), in order to oxidize almost all organic pollutants present in cellulose mill effluents. The most widely known AOPs include heterogeneous photocatalytic oxidation,5–8 treatment with ozone (often combined with H 2 O 2 , UVA, or both and even with heterogeneous photocatalytic processes),9–12 Fenton,13–15 Fenton‐like,16 and photo‐Fenton reactions 17–22…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Removal of organic contaminants in paper pulp effluents by AOPs: an economic study

Pérez

Torrades

Domènech

et al. 2002

J of Chemical Tech & Biotech

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The degradation of the organic content of a bleaching Kraft mill ef¯uent was carried out using Advanced Oxidation Processes (AOPs). The study was focused on the identi®cation of the AOP, or combination of AOPs, that showed the highest ef®ciency together with the lowest cost. Direct UV photolysis (UV), TiO 2 assisted-photocatalysis (TiO 2 /UV), Fenton, Fenton-like, and photo-Fenton reactions (Fe(II)/H 2 O/UV), UV-assisted ozonation (O 3 /UV) and addition of Fe 2 and/or H 2 O 2 to the TiO 2 /UV and the O 3 /UV systems, were used for the degradation of a conventional cellulose bleaching ef¯uent. The ef¯uent was characterized by the general parameters TOC, COD and color, and analyzed for chlorinated low molecular weight compounds using GC±MS. The costs of the systems per unit of TOC reduction were compared. Fenton, Fenton-like and photo-Fenton reactions achieved better levels of TOC degradation than photocatalysis and with lower cost's than photocatalytic treatments. Ozonation is an effective but rather expensive process. The use of UVA light, however, increased the effectiveness of ozonation with a signi®cant decrease (>25%) in the operational cost.

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Section: Principles Of the Aop Methods Employedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Removal of organic contaminants in paper pulp effluents by AOPs: an economic study

Pérez

Torrades

Domènech

et al. 2002

J of Chemical Tech & Biotech

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show abstract

“…Ozonation, often combined with H 2 O 2 , UVA, or both, and even with heterogeneous photocatalytic processes, has been widely applied to wastewater treatment 1–9. The mechanism of the oxidation of organic compounds by ozone and in the dark has been carefully studied by Hoigné and colleagues 10–12…”

Section: Introductionmentioning

confidence: 99%

Treatment of bleaching Kraft mill effluents and polychlorinated phenolic compounds with ozonation

Pérez

Torrades

Domènech

et al. 2002

J of Chemical Tech & Biotech

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The effect of the simultaneous use of ozone, UVA or visible light, and small quantities of Fe(II)/Fe(III) ions in solution on the degradation rate of the organic content of a bleaching Kraft mill ef¯uent was investigated. The same treatment was applied to synthetic samples of polychlorinated phenolic compounds, because these are one of the main groups of compounds found in real bleaching Kraft mill ef¯uents. In order to improve the treatment ef®ciency and to lower the cost of the process several other strategies were investigated. It was found that a previous irradiation of the wastewater or the synthetic sample in the absence of ozone signi®cantly improves the rate of removal of organic pollutants during the subsequent ozonation step.

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“…The rate of decolorization was related to the color intensity. Mao and Smith (1995b) also found the ozone application method did not affect the ability of ozone to remove color, chemical oxygen demand (COD), or TOC from pulp mill effluents, or to improve the biodegradability of pulp mill effluents. In the ozonation of oil shale wastewaters, Trapido et at.…”

Section: Sorption Of Organicsmentioning

confidence: 99%

Physicochemical processes

Matsumoto¹,

Jensen²,

McGinley³

et al. 1993

Water Environment Research

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Influence of Ozone Application Methods on Efficacy of Ozone Decolorization of Pulp Mill Effluents

Cited by 15 publications

References 22 publications

Removal of organic contaminants in paper pulp effluents by AOPs: an economic study

Removal of organic contaminants in paper pulp effluents by AOPs: an economic study

Treatment of bleaching Kraft mill effluents and polychlorinated phenolic compounds with ozonation

Physicochemical processes

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