Replacement of H2O2 by O2 in Fenton and photo-Fenton reactions

Utset, Berta; García, Juan Ramón Carbó; Casado, Juan; Domènech, Xavier; Peral, José

doi:10.1016/s0045-6535(00)00011-4

Cited by 101 publications

(47 citation statements)

References 15 publications

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“…(1)) on the titanomagnetite surface under UV irradiation (365 nm) could be effectively reduced to Fe II with concomitant production of OH radicals (Eq. (4)) (Tryba et al, 2009;Utset et al, 2000). The regenerated Fe II can further participate in the Fenton reaction to produce OH radicals (Eq.…”

Section: Tbbpa Degradation In Different Catalytic Systemsmentioning

confidence: 99%

Heterogeneous UV/Fenton degradation of TBBPA catalyzed by titanomagnetite: Catalyst characterization, performance and degradation products

et al. 2012

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Section: Tbbpa Degradation In Different Catalytic Systemsmentioning

confidence: 99%

Heterogeneous UV/Fenton degradation of TBBPA catalyzed by titanomagnetite: Catalyst characterization, performance and degradation products

et al. 2012

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“…It can be argued that the possible presence of dissolved oxygen (activated by UV radiation) and photolysis effect were crucial factors for COD removal. The presence of dissolved oxygen, due to the strong mixing conditions, was in effect also confirmed by [31][32][33].…”

Section: Photo-fenton Processmentioning

confidence: 67%

H2O2 Based Oxidation Processes for the Treatment of Real High Strength Aqueous Wastes

et al. 2017

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This work was aimed at studying the applicability of H 2 O 2 -based oxidation processes (namely H 2 O 2 /UV, photo-Fenton, and Fenton) for the treatment of six real aqueous wastes. These wastes derived from chemical, pharmaceutical, and detergent production, and were characterised by high COD (chemical oxygen demand) and, in four cases, surfactant concentrations: overall, about 100 tests were conducted. The H 2 O 2 /UV and photo-Fenton processes proved to be very effective in COD removal, the efficiency being greater than 70%. The optimal treatment conditions for the H 2 O 2 /UV process were: 120 min reaction, H 2 O 2 /COD initial dosage ratio = 1/2; the radiation intensity (up to 2000 W·L −1 ) revealed to be a crucial factor, especially in the earlier stage of the process (about 40 min): this aspect can be exploited to reduce the costs related to energy consumption. For the photo-Fenton process the following conditions were chosen: Fe 2+ /H 2 O 2 ratio = 1/30; specific power input = 125 W·L −1 ; H 2 O 2 /COD initial = 1/2; reaction time = 240 min. Photolytic reactions and the presence of dissolved oxygen revealed to be crucial factors for COD removal. The Fenton process, while showing a moderate efficiency (25% COD removal) in the treatment of high loaded wastewaters, provided excellent results in the treatment of aqueous wastes with high content of surfactants. An average yield removal of 70% for non-ionic surfactants (TAS) and 95% for anionic surfactants (MBAS) was obtained, under the following optimal conditions: Fe 2+ /H 2 O 2 = 1/4, H 2 O 2 /COD initial ratio = 1, and contact time = 30 min.

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“…When pH of solution was higher than 4, Fe 2+ could form complex compound. Some Fe 3+ ions generated by Fenton reactions were easily precipitated as Fe(OH) 3 [11]. Preventing it from reduction into Fe 2+ could remarkably affect the formation of • OH.…”

Section: Effect Of Phmentioning

confidence: 99%

S143 Removal of Toxic Organic Pollutants from Coke Plant Wastewater by UV-Fenton

Liang¹,

Li²,

Li³

2016

JRST

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Coke plant wastewater containing lots of toxic organic pollutants should be treated before being discharged into the environment. It is challenging to treat toxic and refractory compounds using conventional methods. In this study, a UV-Fenton technology was investigated. When the initial COD, NH 3 -N concentration and SS of wastewater were 5080 mg/L, 329.9 mg/L, and 847.7 mg/L, results showed that the removal rate of COD, NH 3 -N and SS were 88.0%, 58.4% and 99.2% respectively under the optimal reaction conditions. Under the identified optimal condition, H 2 O 2 concentration is 75 mmol/L, the concentration ratio of H 2 O 2 and Fe 2+ is 3:1, and original pH is 4 within 30 min. GC-MS analysis, revealed that organic substances such as indole and quinoline were degraded effectually.

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Replacement of H2O2 by O2 in Fenton and photo-Fenton reactions

Cited by 101 publications

References 15 publications

Heterogeneous UV/Fenton degradation of TBBPA catalyzed by titanomagnetite: Catalyst characterization, performance and degradation products

Heterogeneous UV/Fenton degradation of TBBPA catalyzed by titanomagnetite: Catalyst characterization, performance and degradation products

H2O2 Based Oxidation Processes for the Treatment of Real High Strength Aqueous Wastes

S143 Removal of Toxic Organic Pollutants from Coke Plant Wastewater by UV-Fenton

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