Experimental design to optimize the degradation of the synthetic dye Orange II using Fenton's reagent

Ramírez, Jorge H; Costa, Carlos A. V.; Madeira, Luís M.

doi:10.1016/j.cattod.2005.07.060

Cited by 168 publications

(137 citation statements)

References 17 publications

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“…However, when a concentration higher than the critical concentration is used, the degradation of organic compounds was decreased as a result of the so-called scavenging effect. The same phenomenon was also observed by Tang and Huang [50] and Ramirez et al [41]:…”

Section: Optimization Of H 2 O 2 Dose For Decolorizationsupporting

confidence: 85%

“…The decolorization of dye solution was increased as the concentration of ferrous ion was increased up to a critical ferrous ion concentration and after this critical concentration the decolorization was observed to be decreased. The decrease in the decolorization may be due to the hydroxyl scavenging effect of ferrous ions as also reported by other researchers [41,50]. This decrease in decolorization at higher ferrous ion can be attributed to the reaction (4).…”

Section: Optimizations Of Fe 2+ Dose For Decolorizationsupporting

confidence: 76%

“…It was also found during the studies that H 2 O 2 dosage was consumed in the early stage of the Fenton reaction. It may be due to the reason that ferrous ion catalyses H 2 O 2 to form hydroxyl radical quickly in the first stage of reaction, more decolorization occurs in the early stage of reaction as also observed by Malik and Saha [49] and Ramirez et al, [41]. The consumption pattern of H 2 O 2 during Fenton oxidation for all three dyes is shown in Fig.…”

Section: Residual H 2 Osupporting

confidence: 67%

“…The maximum absorbance wavelength (λ max ) of RB5, RB13 and AO7 are at 596, 583, and 481 nm, respectively in visible range. In UV range aromatic amines, naphthalene and benzene rings gives absorbance at 254, 310 and 226 nm, respectively [41]. COD was measured by closed reflux titrimetric method as per procedure outlined in standard methods [46].…”

Section: Methodsmentioning

confidence: 99%

“…In most of the previous research works using Fenton's reagent for the treatment of various dyes, the main objective was to mineralize and decolorize the dyes simultaneously and hence a higher doses of H 2 O 2 and Fe 2+ ions were used for the treatment of dyes. In most of the studies, the dye:H 2 O 2 :Fe 2+ mass ratios (w/w/w) ranging between 1:0.25:0.08 and 1:48.96:1.16 were used [41][42][43][44]. At higher doses of the reagents (Fe 2+ and H 2 O 2 ), the operational cost of treatment increases and thus, in this study it was decided to optimize lower doses of reagents for only decolorization of dyes (breaking of -N N-).…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Fenton-biological treatment scheme for the treatment of aqueous dye solutions

Lodha

2007

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Section: Optimization Of H 2 O 2 Dose For Decolorizationsupporting

confidence: 85%

Section: Optimizations Of Fe 2+ Dose For Decolorizationsupporting

confidence: 76%

Section: Residual H 2 Osupporting

confidence: 67%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimization of Fenton-biological treatment scheme for the treatment of aqueous dye solutions

Lodha

2007

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Electrochemical Degradation of Reactive Blue 19 Dye by Combining Boron‐Doped Diamond and Reticulated Vitreous Carbon Electrodes

et al. 2019

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Reactive Blue 19 (RB‐19) dye has a low fixation efficiency, a long half‐life and high toxicity. It is easily loss during the cleaning of textiles and can remain in the environment for a long time, causing serious environmental problems if not removed. This study reports the degradation of RB‐19 by: 1) direct electrochemical degradation with boron‐doped diamond (BDD) electrodes and 2) combined processes using BDD and reticulated vitreous carbon (RVC) electrodes that generate H2O2. The direct degradation uses different current densities and concentrations. High currents densities, longer electrolysis times and low volumetric flow rates favour RB‐19 degradation, removing total colour and 100 % TOC after 5 and 60 min, respectively. At a current density of 41 mA cm−2 and a volumetric flow rate of 20 dm3 h−1, the energy consumption to degrade 20 mg dm−3 of RB‐19 was 279 kWh kg−1. The TOC removal of RB‐19 dye combining BDD and RVC at a current density of 41 mA cm−2 was below 72 % after 90 min and the energy consumption increased to 612 kWh kg−1. The higher energy consumption observed during the combined process suggests that the direct degradation process at low volumetric flow rates is more efficient than the combined process.

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Response surface methodology used for characterization and optimization of photocatalytic and oxidant for the treatment of municipal wastewater

Singh

Chaudhary

2015

Env Prog and Sustain Energy

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In this study, municipal wastewater was treated by two types of advanced oxidation processes-photocatalytic (solar radiation/TiO 2 ) and photocatalytic with oxidation (solar radiation/TiO 2 /H 2 O 2 ). Response Surface Method (RSM) was used for characterization and optimization of both the processes in which a response of interest is influenced by several variables. The factors study includes pH, catalyst dose, and amount of oxidant. The performance of photocatalytic and oxidant process was investigated in terms of percentage degradation of wastewater. The result shows that catalyst dose and amount of oxidant have significant effect on the degradation process of municipal wastewater. Photocatalytic degradation efficiency was found to be dependent on optimized catalyst dose (1 g/L) and amount of oxidant (30 mL/L). Analysis of variance (ANOVA) exhibited a high coefficient (r 2 5 0.912-0.996), thereby indicating a satisfactory fit between the experimental results. The statistical model of solar radiation/TiO 2 /H 2 O 2 has shown excellent performance.

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Experimental design to optimize the degradation of the synthetic dye Orange II using Fenton's reagent

Cited by 168 publications

References 17 publications

Optimization of Fenton-biological treatment scheme for the treatment of aqueous dye solutions

Optimization of Fenton-biological treatment scheme for the treatment of aqueous dye solutions

Electrochemical Degradation of Reactive Blue 19 Dye by Combining Boron‐Doped Diamond and Reticulated Vitreous Carbon Electrodes

Response surface methodology used for characterization and optimization of photocatalytic and oxidant for the treatment of municipal wastewater

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