Decolorization of the azo dye Reactive Black 5 by Fenton and photo-Fenton oxidation

Lucas, Marco S.; Peres, José A.

doi:10.1016/j.dyepig.2005.07.007

Cited by 662 publications

(288 citation statements)

References 27 publications

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“…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%

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

Lodha

2007

Journal of Hazardous Materials

185

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Section: Introductionmentioning

confidence: 99%

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

Lodha

2007

Journal of Hazardous Materials

185

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“…For example, degradation of SMMS declined from 98.5% to 92.2% when the concentration of H 2 O 2 was increased from 0.49 to 1.92 mmol/L in the photo-Fenton process. This phenomenon has been widely reported by many researchers [20,22,27,29]. This could be explained by a critical concentration of H 2 O 2 in the Fenton oxidation process.…”

Section: Optimization Of Reaction Parametersmentioning

confidence: 85%

“…In addition, H + could act as an OH scavenger. At high pH, ferric oxyhydroxides would precipitate and stop the reaction of Fe 3+ with H 2 O 2 to regenerate Fe 2+ , which would reduce the amount of ·OH [20,29]. Therefore, pH 4.0 was optimum for the photo-Fenton process, and resulted in a maximum degradation of SMMS of 98.5%.…”

Section: Optimization Of Reaction Parametersmentioning

confidence: 99%

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Degradation of the antibiotic sulfamonomethoxine sodium in aqueous solution by photo-Fenton oxidation

et al. 2012

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In this study, photo-Fenton oxidation was applied to degradation of sulfamonomethoxine sodium (SMMS) in aqueous solution. The operation parameters of pH, temperature, and concentrations of H 2 O 2 , Fe 2+ and SMMS were investigated. The optimum conditions for the photo-Fenton process were determined as follows:.51 mol/L and T=25°C. Under these conditions 98.5% of the SMMS degraded. The kinetics were also studied, and degradation of SMMS by the photo-Fenton process could be described by first-order kinetics. The apparent activation energy was calculated as 23.95 kJ/mol. Mineralization of the process was investigated by measuring the chemical oxygen demand (COD), and the COD decreased by 99% after 120 min. This process could be used as a pretreatment method for wastewater containing sulfamonomethoxine sodium.sulfamonomethoxine sodium, degradation, photo-Fenton

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“…Adsorption could not minimize the risk to environments, due to its inability in degrading dye molecules. The advanced oxidation processes (AOPs), such as O 3 photo-catalysis reaction, and UV-H 2 O 2 , contribute to satisfactory decolorization, degradation, and mineralization of dyes [13][14][15][16]. However, AOPs are rarely used in practice, owing to the complicate reactors and high costs.…”

Section: Introductionmentioning

confidence: 99%

Treatment of dye wastewater with permanganate oxidation and in situ formed manganese dioxides adsorption: Cation blue as model pollutant

Liu

Zhao

et al. 2010

Journal of Hazardous Materials

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a b s t r a c tThis study investigated the process of potassium permanganate (KMnO 4 ) oxidation and in situ formed hydrous manganese dioxides (␦MnO 2 ) (i.e., KMnO 4 oxidation and ␦MnO 2 adsorption) for the treatment of dye wastewater. The effectiveness of decolorization, removing dissolved organic carbon (DOC), and increasing biodegradable oxygen demand (BOD) were compared among these processes of KMnO 4 oxidation, ␦MnO 2 adsorption, and KMnO 4 oxidation and ␦MnO 2 adsorption. ␦MnO 2 adsorption contributed to the maximum DOC removal of 65.0%, but exhibited limited capabilities of decolorizing and increasing biodegradability. KMnO 4 oxidation alone at pH 0.5 showed satisfactory decrease of UV-vis absorption peaks, and the maximum BOD 5 /DOC value of 1.67 was achieved. Unfortunately, the DOC removal was as low as 27.4%. Additionally, the great amount of acid for pH adjustment and the much too low pH levels limited its application in practice. KMnO 4 oxidation and ␦MnO 2 adsorption at pH 2.0 was the best strategy prior to biological process, in balancing the objectives of decolorization, DOC removal, and BOD increase. The optimum ratio of KMnO 4 dosage to X-GRL concentration (R KMnO 4 /X-GRL ) was determined to be 2.5, at which KMnO 4 oxidation and ␦MnO 2 adsorption contributed to the maximal DOC removal of 53.4%. Additionally, the optimum pH for X-GRL treatment was observed to be near 3.0.

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Decolorization of the azo dye Reactive Black 5 by Fenton and photo-Fenton oxidation

Cited by 662 publications

References 27 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

Degradation of the antibiotic sulfamonomethoxine sodium in aqueous solution by photo-Fenton oxidation

Treatment of dye wastewater with permanganate oxidation and in situ formed manganese dioxides adsorption: Cation blue as model pollutant

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