Decolorization of Congo red via hydrodynamic cavitation in combination with Fenton’s reagent

Askarniya, Zahra; Sadeghi, Mohammad-Taghi; Baradaran, Soroush

doi:10.1016/j.cep.2020.107874

Cited by 38 publications

(8 citation statements)

References 38 publications

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“…Generally, advanced oxidation of organic pollutants is more efficient when ferrous ions are at 2-5 mM concentrations. This range is sufficient for HO⋅ to be produced where Fe 2þ ions are still highly soluble at a pH of 2-5 (Arslan-Alaton et al, 2008;Askarniya et al, 2020). Iron solubility is one of the obvious aspects of Fenton oxidation since the rate of HO⋅ formation is proportional to Fe 2þ concentration.…”

Section: Effect Of Fe 2þ Concentrationmentioning

confidence: 99%

Kinetic and thermodynamic studies of fenton oxidative decolorization of methylene blue

Giwa

Bello

Olabintan

et al. 2020

Heliyon

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The need for light intensity has made dye degradation very costly for industry. In this work, Fenton reagent was used for the efficient degradation of an aqueous solution of dye without the need for a light source. The influences of the pH of the media, the initial concentrations of Fe 2+ , H 2 O 2 , and methylene blue (MB) dye; in addition to temperature on the oxidation of MB dye were studied. The optimum amounts of the Fenton reagent were 4mM of Fe 2+ and 70mM of H 2 O 2 at 20 mg/L of dye. The optimum ratio of 0.05 of Fe 2+ /H 2 O 2 was found to give the best result for the decolorization of dye. The Fenton process was effective at pH 3 with a maximum dye decolorization efficiency of 98.8% within 30 min of reaction, corresponding to a COD removal of 85%. The decolorization process was thermodynamically feasible, spontaneous, and endothermic. The activation energy (E a ) was 33.6 kJ/mol suggesting that the degradation reaction proceeded with a low energy barrier.

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Section: Effect Of Fe 2þ Concentrationmentioning

confidence: 99%

Kinetic and thermodynamic studies of fenton oxidative decolorization of methylene blue

Giwa

Bello

Olabintan

et al. 2020

Heliyon

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“…It was reported that maximum decolorisation (97.7%), COD reduction (38% in 120 min) and TOC reduction (48% in 15 min) were obtained at an optimal Fenton ratio (Fe 2+ : H 2 O 2 ) of 1:5 and 5 bar of inlet pressure. Askarniya et al [81] explored the use of HC + Fenton scheme for the decolorization of Congo red (diazoic dye) with studies performed at various operating parameters viz. pH of the solution (3–10), H 2 O 2 dosage (0–1 g/L) and FeSO 4 loading (0–0.05 g/L).…”

Section: Resultsmentioning

confidence: 99%

Application of hybrid oxidative processes based on cavitation for the treatment of commercial dye industry effluents

Gujar

Gogate

2021

Ultrasonics Sonochemistry

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Highlights Critical analysis of the hybrid processes involving ultrasound, Fenton and ozone. Guidelines for optimum operating conditions provided for maximum benefits. Original study on treatment of two real industrial effluents. US-Fenton approach followed by lime treatment established as the best approach. Use of ozone does not add much benefits to US-Fenton treatment process.

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“…Mukharjee et al [48] and Thaneker et al [15] have investigated the degradation of sodium dodecyl sulfate and real industrial effluent using HC combined with H 2 O 2 and reported SC values of 4.81 and 2.75, respectively. Askarniya et al [57] have studied the decolorization of Congo Red using HC combined with the Fenton reagent and reported an SC value of 3.22. Innocenzi et al [34] have studied HC in conjugation with the Fenton process for the degradation of Methyl Orange and reported an SC of 3.13.…”

Section: Degradation Kineticsmentioning

confidence: 99%

Degradation of Tartrazine Using Hydrodynamic Cavitation‐Based Hybrid Techniques and Fenton Chemistry

2022

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Degradation of the tartrazine was investigated systematically using the Fenton oxidation process and hydrodynamic cavitation (HC)‐based hybrid techniques. The operating parameters, such as the inlet pressure, the initial pH, the initial concentration of tartrazine, and the molar ratio of the Fenton reagents, were optimized. A maximum degradation of 12.50 % was observed using HC alone at 5 bar pressure and a solution pH of 2, while Fenton chemistry showed 92.40 % degradation at a Fe2+/H2O2 molar ratio of 1:36. HC in conjugation with H2O2 or Fenton reagents showed maximum degradation values of 92 and 96.40 %, respectively. The degradation follows a pseudo‐first‐order kinetics with respect to the concentration of tartrazine, for Fenton chemistry and the HC‐based hybrid techniques.

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Decolorization of Congo red via hydrodynamic cavitation in combination with Fenton’s reagent

Cited by 38 publications

References 38 publications

Kinetic and thermodynamic studies of fenton oxidative decolorization of methylene blue

Kinetic and thermodynamic studies of fenton oxidative decolorization of methylene blue

Application of hybrid oxidative processes based on cavitation for the treatment of commercial dye industry effluents

Degradation of Tartrazine Using Hydrodynamic Cavitation‐Based Hybrid Techniques and Fenton Chemistry

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