Ozonation of Dyestuff Solutions Using a Fine Bubble Generator System

Takahashi, Nobuyuki; Ichikawa, Hiroyasu; Torii, Hisatomo; Shibata, Shingo; Duy, Nguyen Phuc Hoang; Phuong, Pham T. T.

doi:10.1080/01919512.2012.663720

Cited by 4 publications

(6 citation statements)

References 6 publications

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“…For conventional ozonation, 94 and 90 % removal was observed for reactive yellow and direct yellow dyes after 90 -120 minutes. This was in contrast to 95 and 98 % respectively for the microbubble ozonation system in a (Takahashi et al, 2012a).…”

Section: Dyestuffmentioning

confidence: 58%

“…Reactive black 5 (RB5) dye from 0.092 to 0.16 min -1 (Chu et al, 2007) and methyl orange from 8.1 x 10 -3 to 0.24 min -1 (Hu and Xia, 2018). Similarly, Takahashi et al (2012a) tested four different dyes (reactive blue, reactive yellow, direct yellow, orange I) and observed that the rate constant was enhanced by 1.1 -3.1 times when using a microbubble system with a bubble size of 15 -40 µm in a water depth of 1.2 m. Whilst the rates of degradation were different, the absolute removal of contaminants over the total duration of the experiments were similar for microbubbles and conventional bubbles. This has been seen over a 60 minute exposure experiment using acid red 3R dye (Zhang et al, 2018), for reactive blue and orange I dyes over a 120-minute experiment (Takahashi et al, 2012a), congo red dye over 20 minutes (Khuntia et al, 2012) and for RB5 dye during a 120-minute experiment (Chu et al, 2007).…”

Section: Dyestuffmentioning

confidence: 99%

“…Ozone is commonly used for the degradation of dyes (Takahashi et al, 2012a) and the use of microbubble systems has been considered as a way of increasing their rate of removal.…”

Section: Dyestuffmentioning

confidence: 99%

See 2 more Smart Citations

Microbubbles and their application to ozonation in water treatment: A critical review exploring their benefit and future application

John

Brookes

Carra

et al. 2020

Critical Reviews in Environmental Science and Technology

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Ozonation is a widely applied water treatment process, used for oxidation of contaminants, as well as for the disinfection of water. However, the conventional ozonation process demands a high energy requirement and deep tanks to ensure effective mass transfer and oxidation.Microbubble technologies have emerged which have the potential to improve gas-liquid contacting. Microbubbles have diameters of 1-100 µm, while conventional bubbles used in ozonation are between 2 -6 mm. Microbubbles have many favorable characteristics that make them suitable for ozonation. In this review, the attributes of microbubbles for ozonation have been compared with those of conventional bubbles. The higher interfacial area and lower rise velocity of microbubbles compared with conventional bubbles means that ozone in the gas phase can be more efficiently transferred into the liquid phase. This is due to a higher contact time and increased contact area of the bubble with the bulk liquid. The analysis reveals that the volumetric mass transfer coefficient can be significantly enhanced through the use of microbubbles. In addition, the steady state dissolved ozone concentration was positively impacted by the use of microbubbles. Microbubbles were shown to be able to oxidize a broader range of organic compounds more quickly than for conventional bubbles. However, the review highlighted that comparison of microbubbles with conventional bubbles is not always carried

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Section: Dyestuffmentioning

confidence: 58%

Section: Dyestuffmentioning

confidence: 99%

See 1 more Smart Citation

Microbubbles and their application to ozonation in water treatment: A critical review exploring their benefit and future application

John

Brookes

Carra

et al. 2020

Critical Reviews in Environmental Science and Technology

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show abstract

“…It has been known that ozone is a strong oxidant and can be used to remove some pigments due to its high oxidation potential (Coca et al 2005;Fernández et al 2006;Loeb 2009Loeb , 2011Naito and Takahara 2006;Takahashi et al 2012). For example, Seo et al (2007) reported in their research work that ozone treatment of chitosan in acetic acid solution resulted in reduction of molecular size with destruction of chitosan pigments (carotenoids).…”

Section: Introductionmentioning

confidence: 97%

Decolorization of Brown Chitooligomers in Aqueous Solution by Ozonation

Zhang

Xie

et al. 2015

Ozone: Science & Engineering

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Brown chitooligomers were obtained by gamma irradiation. Decolorization of brown chitooligomers in aqueous solution by ozonation was investigated. It was found that ozone could decolorize the brown chitooligomers in aqueous solution.When the pH value was below 2.93, the ozone treatment could inhibit yellowing and browning of chitooligomers in aqueous solution. As a result, the chitooligomers were slightly depolymerized by ozonation. The characterization showed that the decolorization by ozonation did not lead to the significant modification of chemical structure of the chitooligomers.

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“…As an efficient and clean advanced oxidation technology, ozone uses the large number of strong oxidizing free radicals produced in the reaction process to oxidize organic matter in water to achieve water purification. The application of ozone catalytic oxidation technology in printing and dyeing wastewater has gradually matured (Takahashi et al, 2012;Mirilă et al, 2020;Tabrizi et al, 2011). The problems of this technology include low oxygen oxidation efficiency and low utilization rate.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Mn/Mg/Ce Ternary Ozone Catalyst and Its Mechanism for the Degradation of Printing and Dyeing Wastewater

Shuai

Ren

et al. 2022

Front. Energy Res.

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The printing and dyeing wastewater produced by different dyes, as well as different printing and dyeing processes, have different components. These wastewater have high toxicity, high organic concentration, and deep chromaticity. Ozone catalytic oxidation is a very promising technical method for wastewater treatment. In this paper, Mn/Mg/Ce ternary catalyst was prepared, and the ozone catalytic oxidation treatment of actual and simulated printing and dyeing wastewater was performed to study the performance of four different carrier catalysts, namely, molecular sieve (MS), silica gel (SG), attapulgite (ATP), and nano alumina (Al2O3), by simulated dynamic test. The effects of reaction time, pH, and catalyst dosage on methyl orange degradation were studied. The results showed that under the optimum treatment conditions (120 min, pH 11, and 12.5 g/L catalyst dosage), the degradation rate of methyl orange reached 96% and the removal rate of the chemical oxygen demand of printing and dyeing wastewater reached 48.7%. This study shows that the treatment effect of ozone catalytic oxidation on printing and dyeing wastewater is remarkably improved after catalyst addition. This study provides a new choice of ozone catalyst for the degradation of printing and dyeing wastewaters in the future.

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Ozonation of Dyestuff Solutions Using a Fine Bubble Generator System

Cited by 4 publications

References 6 publications

Microbubbles and their application to ozonation in water treatment: A critical review exploring their benefit and future application

Microbubbles and their application to ozonation in water treatment: A critical review exploring their benefit and future application

Decolorization of Brown Chitooligomers in Aqueous Solution by Ozonation

Preparation of Mn/Mg/Ce Ternary Ozone Catalyst and Its Mechanism for the Degradation of Printing and Dyeing Wastewater

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