Degradation of Reactive Red 194 and Reactive Yellow 145 azo dyes by O3 and H2O2/UV-C processes

Gül, Şermin; Özcan-Yıldırım, Özlem

doi:10.1016/j.cej.2009.08.029

Cited by 61 publications

(14 citation statements)

References 18 publications

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“…Assuming pseudo first order reaction kinetics for the dyes, the decolorization rate constant was determined from the slope of the semi-logarithmic plot of color versus reaction time in accordance with the kinetic equation below [9]:…”

Section: Degradation Kineticmentioning

confidence: 99%

“…Especially, ozonation has been one of the most effective oxidation processes. Gül and Yildirim [9] have reported that decolorizations of RR194 and RY145 were increased by ozonation when compared to H 2 O 2 /UV process. Alaton et al [11] also reported that detoxification and biodegradability of effluents from textile preparation was improved by ozonation.…”

Section: Introductionmentioning

confidence: 98%

“…Many researchers have used these processes, such as photocatalysis, electro-Fenton, wet-air [5,6], Fenton [7,8], and ozonation applications [9][10][11][12] to deal with this waste. Especially, ozonation has been one of the most effective oxidation processes.…”

Section: Introductionmentioning

confidence: 99%

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A Comparative Study of Ozonation, Homogeneous Catalytic Ozonation, and Photocatalytic Ozonation for C.I. Reactive Red 194 Azo Dye Degradation

YILDIRIM

Gül

Eren

et al. 2011

CLEAN Soil Air Water

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In this study, the decolorization, dearomatization, and mineralization efficiencies of different advanced oxidation processes (AOPs; namely O 3 , O 3 /Fe(II), O 3 /Fe(II)/UVA, and O 3 /TiO 2 /UVA) were investigated for the azo dye C.I. Reactive Red 194 (RR194). The effects of pH (3-11), amount of TiO 2 (0.05-1 g/L), and concentration of Fe(II) (0.1-1.6 mM) were investigated for the applied methods. The decolorization and mineralization efficiencies of the photocatalytic ozonation system (O 3 /TiO 2 /UVA) were increased by decreasing the pH of the dye solution in contrast to the ozonation system (O 3 ). Decolorization of RR194 was increased in the photocatalytic ozonation system with an increasing amount of catalyst however, a decreasing was occurred for the homogeneous catalytic system (O 3 /Fe(II)) when increasing the concentration of catalyst. The decolorization efficiency of the homogeneous catalytic system (O 3 /Fe(II)) was enhanced when combined with UVA light. In our study, the most efficient method for dearomatization and mineralization was the O 3 /TiO 2 /UVA among the applied AOPs.

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Section: Degradation Kineticmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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A Comparative Study of Ozonation, Homogeneous Catalytic Ozonation, and Photocatalytic Ozonation for C.I. Reactive Red 194 Azo Dye Degradation

YILDIRIM

Gül

Eren

et al. 2011

CLEAN Soil Air Water

Self Cite

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“…Especially, ozonation has been one of the most effective oxidation processes. Some researchers [6] have reported that ozone increased the rate of decolorization for two azo dyes when compared with H 2 O 2 /UV process in their study. Alaton and Alaton [7] exposed that detoxification and biodegradability of effluents from textile preparation were improved by ozonation.…”

Section: Introductionmentioning

confidence: 97%

“…Thus, effective methods are needed to deal with the waste containing toxic dyes. Many researchers have used various processes, such as photocatalysis, electro-Fenton, wet-air [2,3], Fenton [4,5] and ozonation applications [6][7][8][9][10] to deal with this waste. Especially, ozonation has been one of the most effective oxidation processes.…”

Section: Introductionmentioning

confidence: 99%

Decolorization of malachite green, decolorization kinetics and stoichiometry of ozone-malachite green and removal of antibacterial activity with ozonation processes

Kuşvuran¹,

Gülnaz²,

Samil³

et al. 2011

Journal of Hazardous Materials

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Degradation of Styrene from Waste Gas Stream by Advanced Oxidation Processes

Kočí

Reli

Troppová

et al. 2019

CLEAN Soil Air Water

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Waste‐air treatment is experimentally investigated by advanced oxidation processes utilizing UV irradiation combined with ozone and hydrogen peroxide. The effect of operating parameters, such as an initial concentration of styrene and flow rate of gas, on the removal of styrene is studied in a photochemical pilot plant unit. The conversion of styrene decreases with an increasing initial styrene concentration and with a decreasing retention time (higher flow rate) of waste gas. The highest conversion of styrene (87%) is achieved under lower initial styrene concentration (100 ppm) and lower flow rate (42 m3 h−1). The energy per order is also calculated for the advanced oxidation process. Electrical energy per order is calculated for all the experimental conditions and it was found that the energy consumption is of about 0.070 kWh m−3 per order, for the 87% styrene removal at 100 ppm of initial styrene concentration and 42 m3 h−1 flow rate. The combination of UV irradiation and ozone is significantly more efficient with lower electrical energy need per order in comparison with combination of UV irradiation and hydrogen peroxide. Therefore, the advanced oxidation process represents a promising treatment technology for the management of waste‐air, and the pilot plant unit designed for high flow rates of waste‐gas streams is suitable for an industrial use.

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Degradation of Reactive Red 194 and Reactive Yellow 145 azo dyes by O3 and H2O2/UV-C processes

Cited by 61 publications

References 18 publications

A Comparative Study of Ozonation, Homogeneous Catalytic Ozonation, and Photocatalytic Ozonation for C.I. Reactive Red 194 Azo Dye Degradation

A Comparative Study of Ozonation, Homogeneous Catalytic Ozonation, and Photocatalytic Ozonation for C.I. Reactive Red 194 Azo Dye Degradation

Decolorization of malachite green, decolorization kinetics and stoichiometry of ozone-malachite green and removal of antibacterial activity with ozonation processes

Degradation of Styrene from Waste Gas Stream by Advanced Oxidation Processes

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