Kinetic of the degradation of C.I. Food Yellow 3 and C.I. Food Yellow 4 azo dyes by the oxidation with hydrogen peroxide

Fragoso, Cleci Teresinha; Battisti, Rodrigo; Miranda, Crisleide; Jesus, Paulo César de

doi:10.1016/j.molcata.2008.11.014

Cited by 42 publications

(17 citation statements)

References 15 publications

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“…, for the temperature range of 20−50°C. Similar trends were also reported for the degradation of phenol, 4‐chlorophenol, 4‐nitrophenol, p ‐nitroaniline; OTC hydrolysis and photolysis; oxidation of C. I. food yellow 3 and 4 . E A was calculated using Arrhenius equation:

\ln k_{obs} = \ln A - \frac{E_{A}}{R T}

where A is the pre‐exponential factor and R the gas constant (8.314 J K −1 mol −1 ).…”

Section: Resultssupporting

confidence: 69%

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Kinetics and Thermodynamic Studies of Oxytetracycline Mineralization Using UV/H₂O₂

Rahmah

Harimurti

Omar

et al. 2014

CLEAN Soil Air Water

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Oxytetracycline (OTC), a widely used antibiotic, was taken as the model contaminant to study the kinetic and thermodynamic parameters of mineralization using a UV/H2O2 system. Mineralization experiments were carried out at different initial OTC concentrations of 0.0156–0.0531 M, initial H2O2 concentrations of 0.043–0.116 M and at a temperature range of 20 − 50°C. The OTC mineralization process was monitored by measuring the total organic carbon as well as H2O2 consumption. The analysis of mineralization data showed two phases of mineralization: phase I: 0 ≤ t ≤ 30 min and phase II: 30 ≤ t ≤ 180 min. Based on this, the kinetic and thermodynamic parameters were established. The order of reaction obtained for organic C and H2O2 is 0.624 and 0.599 (phase I) and 0.954 and 0.062 (phase II), respectively. Based on this kinetic model, the OTC degradation rate constants were 0.0069 min−1 (phase I) and 0.0051 min−1 (phase II). The activation energy for phase I and phase II oxidation was 10.236 and 9.913 kJ mol−1, respectively. The estimated Δ#G and Δ#H values are positive, whereas negative Δ#S values were obtained.

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\ln k_{obs} = \ln A - \frac{E_{A}}{R T}

where A is the pre‐exponential factor and R the gas constant (8.314 J K −1 mol −1 ).…”

Section: Resultssupporting

confidence: 69%

“…8, for the temperature range of 20À50°C. Similar trends were also reported for the degradation of phenol, 4-chlorophenol, 4-nitrophenol, p-nitroaniline; OTC hydrolysis and photolysis; oxidation of C. I. food yellow 3 and 4 [22,[32][33][34][35]. E A was calculated using Arrhenius equation:…”

Section: Estimation Of Activation Energysupporting

confidence: 66%

Kinetics and Thermodynamic Studies of Oxytetracycline Mineralization Using UV/H₂O₂

Rahmah

Harimurti

Omar

et al. 2014

CLEAN Soil Air Water

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“…The maximum H 2 O 2 consumption detected was 7.5%. Other authors also found low degradation of dyes by peroxidation (Elmorsi et al, 2010;Fragoso et al, 2009;Alaton and Balcioglu, 2001). The oxidation power of H 2 O 2 does not seem to be enough to cause dye decomposition.…”

Section: Peroxidation (H 2 O 2 )mentioning

confidence: 94%

A comparative study on the degradation of RB-19 dye in an aqueous medium by advanced oxidation processes

Guimarães

Maniero

Araújo

2012

Journal of Environmental Management

119

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“…Among the before mentioned approaches for azo dyes treatment, photocatalysis has attracted increasing attention in recent years [7][8][9][10][11][12]. Due to its capability to treat extremely low concentration of organic pollutants at room temperature and it is environmental friendly, photocatalysis has been widely employed in the treatment of all kinds of organic contaminants [13].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic decolorization of methyl orange solution with KIO₃

Zhong

Wang

et al. 2014

Desalination and Water Treatment

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2014): Photocatalytic decolorization of methyl orange solution with KIO 3 , Desalination and Water Treatment, A B S T R A C TThe use of azo dyes must be controlled and the sewage must be properly treated before being released into the environment. Thus, it is crucial to develop processes that can destroy these azo dyes completely. It has been reported that a methyl orange (MO) aqueous solution can be effectively decolorized in KIO 3 homogeneous system under UV light irradiation. In this study, the kinetics and effects of KIO 4 , H 2 O 2 , K 2 S 2 O 8 , and KBrO 3 on the decolorization of MO with KIO 3 under UV light irradiation were investigated in detail. The results show the decolorization reaction is a zero-order reaction when the concentration of MO is above 25 mg/L. IO À 4 , S 2 O 2À 8 , BrO À 3 , and H 2 O 2 can greatly inhibit the photocatalytic decolorization reaction of MO. Several observations indicate the photocatalytic decolorization of MO with KIO 3 under UV irradiation occurs by Å O À 2 attack only. A more detailed mechanism of KIO 3 photocatalysis will be further investigated in the near future.

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Kinetic of the degradation of C.I. Food Yellow 3 and C.I. Food Yellow 4 azo dyes by the oxidation with hydrogen peroxide

Cited by 42 publications

References 15 publications

Kinetics and Thermodynamic Studies of Oxytetracycline Mineralization Using UV/H₂O₂

Kinetics and Thermodynamic Studies of Oxytetracycline Mineralization Using UV/H₂O₂

A comparative study on the degradation of RB-19 dye in an aqueous medium by advanced oxidation processes

Photocatalytic decolorization of methyl orange solution with KIO₃

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Kinetic of the degradation of C.I. Food Yellow 3 and C.I. Food Yellow 4 azo dyes by the oxidation with hydrogen peroxide

Cited by 42 publications

References 15 publications

Kinetics and Thermodynamic Studies of Oxytetracycline Mineralization Using UV/H2O2

Kinetics and Thermodynamic Studies of Oxytetracycline Mineralization Using UV/H2O2

A comparative study on the degradation of RB-19 dye in an aqueous medium by advanced oxidation processes

Photocatalytic decolorization of methyl orange solution with KIO3

Contact Info

Product

Resources

About

Kinetics and Thermodynamic Studies of Oxytetracycline Mineralization Using UV/H₂O₂

Kinetics and Thermodynamic Studies of Oxytetracycline Mineralization Using UV/H₂O₂

Photocatalytic decolorization of methyl orange solution with KIO₃