Removal of organophosphorus pesticides from water by electrogenerated Fenton's reagent

Guivarch, Elodie; Oturan, Nihal; Oturan, Mehmet A.

doi:10.1007/s10311-003-0029-4

Cited by 77 publications

(36 citation statements)

References 13 publications

(10 reference statements)

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“…The boron-doped diamond electrode is now considered as the most efficient anode for the mineralization of organics by anodic oxidation. Electro-Fenton is an advanced electrochemical oxidation process based on the continuous supply of H 2 O 2 generated from reaction 1 to a contaminated acid solution containing Fe 2+ or Fe 3+ as catalyst (Boye et al 2002;Brillas et al 2004;Gözmen et al 2003;Guivarch et al 2003;Ventura et al 2002). Á OH is then produced in the medium by the Fenton's reaction between ferrous ion and hydrogen peroxide:…”

Section: Resultsmentioning

confidence: 99%

“…Another electrochemical treatment is electro-Fenton based on the electrogeneration of hydrogen peroxide at the cathode of the electrolytic cell and the catalytic effect of Fe 2+ to give oxidant Á OH. The effectiveness of this technique has been well proven in recent studies on the degradation of acid solutions of chlorophenoxy herbicides (Boye et al 2002;Brillas et al 2004), atrazine (Ventura et al 2002), bisphenol A (Gözmen et al 2003), organophosphorus pesticides (Guivarch et al 2003) and paracetamol ).…”

Section: Introductionmentioning

confidence: 96%

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Removal of the herbicide amitrole from water by anodic oxidation and electro-Fenton

et al. 2005

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Here we demonstrate that an aqueous solution of the herbicide amitrole can be completely depolluted at pH 3.0 by anodic oxidation and electro-Fenton process. Anodic oxidation gives faster degradation with a borondoped diamond anode than with a Pt anode. ElectroFenton with a Pt anode and 1 mmol l 1 Fe 2+ as catalyst yields the quickest depollution. Amitrole decay always follows a pseudo first-order reaction. NO 3 and NH 4 + are accumulated in the medium during mineralization, although volatile N-products are also formed. These environmentally friendly electrochemical treatments could be applied to the remediation of wastewaters containing amitrole.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Removal of the herbicide amitrole from water by anodic oxidation and electro-Fenton

et al. 2005

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“…These processes combine several oxidants and/or physical treatments, such as ultraviolet light and ultrasonic irradiation with or without the use of chemical catalysts. AOPs are based on the formation of hydroxyl radicals ( • OH), which promote radical chain reactions leading to the destruction of aromatic compounds, adsorbable organic halogen (AOX), detergents, pesticides, azo dyes, and phenols [5,6,12,[14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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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“…Their toxicity, stability to natural decomposition and persistence in the environment has been the cause of much concern to societies and regulating authorities around the world. Biodegradation is not efficient at low levels of the substrate and photochemical oxidation processes such as H 2 O 2 /UV (Mazellier et al, 2003) and TiO 2 /UV (Sakkas and Albanis 2003) or electrogenerated Fenton's processes (Guivarch et al 2003, Edelahi et al 2004) have therefore been applied for their treatment. Most aromatic molecules undergo photocatalytic degradation when irradiated in the presence of suitable semiconductors.…”

Section: Introductionmentioning

confidence: 99%

TiO2 photocatalyzed degradation of diazinon in an aqueous medium

et al. 2005

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The photocatalytic degradation of diazinon was studied over TiO 2 catalysts. The kinetics obtained demonstrated that powder titania (t 1/2 = 9.7 min) was more efficient compared to pure titania thin film catalysts (t 1/2 = 29.4 min). Mineralization of organic carbon to CO 2 after 360 min of irradiation was found to be 75% while heteroatoms (P, S, N) were mineralized into phosphate, sulfate and nitrate ions, respectively. A microtox test was performed to evaluate the toxicity of solutions treated by catalysts. Illumination of diazinon in the presence of TiO 2 gave rise to several intermediates that have been identified by means of solid phase extraction and gas chromatography-mass spectrometry, while a simple degradation pathway is proposed.

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Removal of organophosphorus pesticides from water by electrogenerated Fenton's reagent

Cited by 77 publications

References 13 publications

Removal of the herbicide amitrole from water by anodic oxidation and electro-Fenton

Removal of the herbicide amitrole from water by anodic oxidation and electro-Fenton

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

TiO2 photocatalyzed degradation of diazinon in an aqueous medium

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