Ozone Absorption in Water: Mass Transfer and Solubility

Ouederni, Abdelmottaleb; Mora, J.; Bès, René

doi:10.1080/01919518708552384

Cited by 28 publications

(6 citation statements)

References 10 publications

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“…Determination of overall mass transfer coefficients Figure 1 presents a typical schematic diagram of ozonation process, where the ozone is produced by an ozone generator and able to reach 10 % or higher. Ouederni et al [4] proposed the following equation to determine the ozone transfer in stirred reactors:…”

Section: Engineering Practicementioning

confidence: 99%

Application of Mass Transfer Models in Environmental Engineering

Chiang¹,

Pan²

2015

Mass Transfer - Advancement in Process Modelling

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Geσeraρρy, uσit τperatiτσ prτcesses that are used iσ eσvirτσmeσtaρ eσgiσeeriσg are iσ-vτρved iσ iσterfaciaρ reactiτσ where mass traσsfer is aσ extremeρy esseσtiaρ cτmpτσeσt fτr system τptimizatiτσ. The purpτses τf this chapter were iσteσded tτ prτvide the iσfτrma-tiτσ τf bτth theτreticaρ mτdeρ deveρτpmeσt aσd eσgiσeeriσg practice fτr mass traσsfer τf impτrtaσt prτcesses iσ eσvirτσmeσtaρ eσgiσeeriσg. Thτse prτcesses iσcρude, but are στt ρimited tτ, τzτσatiτσ gas-ρiquid prτcess , iτσ exchaσge ρiquid-sτρid prτcess , biτρτgicaρ activated carbτσ ρiquid-sτρid prτcess , chρτriσatiτσ gas-ρiquid prτcess , aσd carbτσatiτσ gas-ρiquid-sτρid prτcess .

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Section: Engineering Practicementioning

confidence: 99%

Application of Mass Transfer Models in Environmental Engineering

Chiang¹,

Pan²

2015

Mass Transfer - Advancement in Process Modelling

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“…Ozone is a powerful oxidant, that reacts with a broad range of organic and inorganic compounds in water (Ouederni et al 1987;Katsoyiannis et al 2011;Khuntia et al 2015). It has been applied to water treatment because of its high reactivity, ease of production, self-decomposition to oxygen, and ability to be used in combination with other conventional treatment methods as well as chemicals to enhance the efficiency of water treatment (Sano et al 2007;Khuntia et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Ultrafine bubbles as an augmenting agent for ozone-based advanced oxidation

Temesgen

Han

2021

Water Science and Technology

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In this study, the influence of nanobubbles (NBs) application in ozone (O3) based advanced oxidation processes (AOP) is investigated. The results demonstrate the potential of NBs application to O3 – based AOP. It was observed that NBs suppress the negative influence of pH and operating temperatures on the efficiency of ozonation. In addition, the application of NBs tends to improve the solubility of O3 and the rate of mass transfer under the influence of a broad range of temperature and pH conditions. The results of this research indicate that application of NBs minimized the reduction in concentration of dissolved O3 with an increase in temperature. Furthermore, application of NBs highly improved the OH radical formation in acidic conditions. The results of this research depicted for first time that the application of NBs strongly encourages the initiation of reactions involving OH radicals. It was found by this research that NBs can boost the concentration of OH radicals up to 3.5 fold compared to equivalent MB-supported ozonation systems. This is assumed to improve the efficiency of currently existing conventional bubble supported O3 – based AOP systems.

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“…[1][2][3][4][5][6][7][8][9][10][11] The influence of pH and ionic strength of the liquid phase on the equilibrium ozone concentration was also considered. [1][2][3][4][5][6][7][8][9][10][11] The influence of pH and ionic strength of the liquid phase on the equilibrium ozone concentration was also considered.…”

Section: Introductionmentioning

confidence: 99%

“…11,12 Literature values of the solubility of ozone in water, converted to a solubility ratio at 20 ºC and pH 7, are summarized in Table I. 6−11 The value of the solubility ratio suggested by Bin, 10 which approximately represents the mean value of the distribution ratios predicted in the literature, [6][7][8][9][10][11] and has been adopted by IOA, was used in this work. In the first group, values of around 0.3 and above are predicted, 1-5 while in the second group, the values are in the range from 0.2 to 0.27.…”

Section: Introductionmentioning

confidence: 99%

“…Ouederni et al 6 suggested the value of volumetric mass transfer coefficient to vary with impeller speed to the power 0.67, while Anselmi et al 13 suggested the exponent 2. Mallevialle et al 14 and Bouaifi et al 15 suggested that the volumetric mass transfer coefficient vary with the specific power input to the power of 0.5, while Qiu et al 16 suggested exponent 0.4 and Yocum 17 0.46.…”

Section: Introductionmentioning

confidence: 99%

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Ozone absorption in a mechanically stirred reactor

Takić¹,

Veljković²,

Lazić³

et al. 2007

JSCS

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Ozone absorption in water was investigated in a mechanically stirred reactor, using both the semi-batch and continuous mode of operation. A model for the precise determination of the volumetric mass transfer coefficient in open tanks without the necessity of the measurement the ozone concentration in the outlet gas was developed. It was found that slow ozone reactions in the liquid phase, including the decomposition of ozone, can be regarded as one pseudo-first order reaction. Under the examined operating conditions, the liquid phase was completely mixed, while mixing in a gas phase can be described as plug flow. The volumetric mass transfer coefficient was found to vary with the square of the impeller speed.

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Ozone Absorption in Water: Mass Transfer and Solubility

Cited by 28 publications

References 10 publications

Application of Mass Transfer Models in Environmental Engineering

Application of Mass Transfer Models in Environmental Engineering

Ultrafine bubbles as an augmenting agent for ozone-based advanced oxidation

Ozone absorption in a mechanically stirred reactor

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