Mineralization of an azo dye Acid Red 14 by photoelectro-Fenton process using an activated carbon fiber cathode

Wang, Aimin; Qu, Jiuhui; Liu, Huijuan; Ru, Jia

doi:10.1016/j.apcatb.2008.04.016

Cited by 165 publications

(87 citation statements)

References 44 publications

(55 reference statements)

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“…The anodic oxidation of SMX at the BDD anode has been investigated by several authors [28,29]. The most common of the indirect electrooxidation methods is electro-Fenton (EF), which is based on the continuous supply of H 2 O 2 generated from two electron reduction of oxygen on the catalytic cathode, such as carbon felt [30,31], O 2 -PTFE cathode [32][33][34][35][36][37] and activated carbon fiber (ACF) [38,39] to a contaminated acid solution containing Fe 2+ or Fe 3+ as catalyst. A recent study has shown that the EF process can degrade antibiotic SMX efficiently [40].…”

Section: Introductionmentioning

confidence: 99%

Mineralization of antibiotic sulfamethoxazole by photoelectro-Fenton treatment using activated carbon fiber cathode and under UVA irradiation

Wang

Estrada

2011

Applied Catalysis B: Environmental

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139

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a b s t r a c tThe mineralization of antibiotic sulfamethoxazole (SMX) of concentrations up to 300 mg L −1 was examined by photoelectro-Fenton (PEF) using an activated carbon fiber (ACF) cathode with UVA (365 nm) irradiation. Comparative mineralization has been studied by different methods: RuO 2 /Ti anodic oxidation (AO), AO in the presence of electrogenerated H 2 O 2 (AO-H 2 O 2 ), AO-H 2 O 2 in the presence of UVA (AO-H 2 O 2 -UVA), and both the electro-Fenton (EF) and PEF processes. PEF treatment at a low applied current of 0.36 A yields a faster and more complete depollution with 80% of the TOC removed after 6 h of electrolysis. The higher oxidative ability of the PEF process can be attributed to the additional hydroxyl radicals (• OH) produced by the photo-Fenton reaction. The 63% mineralization in the case of EF treatment was due to the formation of short intermediates, such as carboxylic acids, which were difficult to oxidise with• OH. In the AO-H 2 O 2 -UVA process, about 36% of the TOC was removed after 6 h electrolysis, while 28% of the TOC was removed in the AO-H 2 O 2 process. SMX is only slightly mineralized by the AO process, with only 25% of the TOC removed. HPLC-MS analysis allowed for up to six aromatic reaction products to be identified during the SMX degradation in the PEF process, mainly formed from the hydroxylation of the aromatic ring or/and isoxazole ring, accompanied by the substitution of the amine group (on aromatic cycle) or methyl group (on isoxazole ring) by• OH. The carboxylic acids generated, including oxalic, maleic, oxamic, formic and acetic acids, were detected by ion-exclusion chromatography. The initial organic nitrogen was mainly converted into NH 4 + along with a very small proportion of NO 3 − ion. Considering all the oxidation intermediates and end products for SMX degradation in the PEF process, a general mineralization mechanism by• OH and UVA was proposed.

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Section: Introductionmentioning

confidence: 99%

Mineralization of antibiotic sulfamethoxazole by photoelectro-Fenton treatment using activated carbon fiber cathode and under UVA irradiation

Wang

Estrada

2011

Applied Catalysis B: Environmental

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139

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“…These methods have significant remarkable benefits; they are versatile, environmentally friendly, provide better security with simple handling conditions and ensure a high yield [2]. Particular attention is given in recent years to electro-Fenton (EF) process as a technical high performance process based on continuous electrogeneration of H 2 O 2 in acid solution by reduction to 2 electrons of oxygen (reaction 1) to the cathode as mercury pool [38,39], carbon felt CF [40][41][42], activated carbon fiber [43], carbon nanotubes-polytetrafluoroethylene PTFE [44], carbon nanotubes immobilized onto graphite fiber [45], carbon PTFE gas diffusion electrodes GDE [46] …”

mentioning

confidence: 99%

Kinetic study of the degradation/mineralization of aqueous solutions contaminated with Rosuvastatin drug by Electro-Fenton: Influence of experimental parameters

Beqqal¹,

Yahya²,

Karbane³

et al. 2017

JMES

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“…was also reported [61,77] (18)) [59]. It should be noted that the dimerization generally occurs at higher concentration of hydroxyl radicals, and such higher concentration is possible with the higher voltage (or current) applied [79].…”

Section: Bdd Ohmentioning

confidence: 92%

Recent Overview of Solar Photocatalysis and Solar Photo-Fenton Processes for Wastewater Treatment

Gutierrez-Mata

Velázquez-Martínez

Álvarez-Gallegos

et al. 2017

International Journal of Photoenergy

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This literature research, although not exhaustive, gives perspective to solar-driven photocatalysis, such as solar photo-Fenton and TiO 2 solar photocatalysis, reported in the literature for the degradation of aqueous organic pollutants. Parameters that influence the degradation and mineralization of organics like catalyst preparation, type and load of catalyst, catalyst phase, pH, applied potential, and type of organic pollutant are addressed. Such parameters may also affect the photoactivity of the catalysts used in the studied solar processes. Solar irradiation is a renewable, abundant, and pollution-free energy source for low-cost commercial applications. Therefore, these solar processes represent an environmentally friendly alternative mainly because the use of electricity can be decreased/avoided.

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Mineralization of an azo dye Acid Red 14 by photoelectro-Fenton process using an activated carbon fiber cathode

Cited by 165 publications

References 44 publications

Mineralization of antibiotic sulfamethoxazole by photoelectro-Fenton treatment using activated carbon fiber cathode and under UVA irradiation

Mineralization of antibiotic sulfamethoxazole by photoelectro-Fenton treatment using activated carbon fiber cathode and under UVA irradiation

Kinetic study of the degradation/mineralization of aqueous solutions contaminated with Rosuvastatin drug by Electro-Fenton: Influence of experimental parameters

Recent Overview of Solar Photocatalysis and Solar Photo-Fenton Processes for Wastewater Treatment

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