Mineralization of Methyl Orange azo dye by processes based on H2O2 electrogeneration at a 3D-like air-diffusion cathode

Márquez, Ana A.; Sirés, Ignasi; Brillas, Enric; Nava, José L.

doi:10.1016/j.chemosphere.2020.127466

Cited by 42 publications

(12 citation statements)

References 46 publications

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“…Kinetics and cost analysis, synthesizing of nanocomposite electrodes, air-diffusion cathode, proposal of mechanism and degradation pathways, novel orbiting electrodes reactor and recirculation flow-through reactor [103][104][105][106][107][108] Table 2. Cont.…”

Section: Fentonmentioning

confidence: 99%

Recent Achievements in Dyes Removal Focused on Advanced Oxidation Processes Integrated with Biological Methods

2021

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In the last 3 years alone, over 10,000 publications have appeared on the topic of dye removal, including over 300 reviews. Thus, the topic is very relevant, although there are few articles on the practical applications on an industrial scale of the results obtained in research laboratories. Therefore, in this review, we focus on advanced oxidation methods integrated with biological methods, widely recognized as highly efficient treatments for recalcitrant wastewater, that have the best chance of industrial application. It is extremely important to know all the phenomena and mechanisms that occur during the process of removing dyestuffs and the products of their degradation from wastewater to prevent their penetration into drinking water sources. Therefore, particular attention is paid to understanding the mechanisms of both chemical and biological degradation of dyes, and the kinetics of these processes, which are important from a design point of view, as well as the performance and implementation of these operations on a larger scale.

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Section: Fentonmentioning

confidence: 99%

Recent Achievements in Dyes Removal Focused on Advanced Oxidation Processes Integrated with Biological Methods

2021

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“…It is a typical threedimensional carbon-based material. 7,8 By loading carbon nanotubes, carbon black, graphene and activated carbon, the specific surface area and active sites of GF can be effectively increased, thereby improving its performance as a cathode for the EF process to produce H 2 O 2 and degrade pollutants. [9][10][11][12] Therefore, loading carbon materials to modify GF has a good prospect for obtaining more suitable cathode materials.…”

Section: Introductionmentioning

confidence: 99%

Graphite felt modified by nanoporous carbon as a novel cathode material for the EF process

Liu

Jia

et al. 2022

New J. Chem.

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“…Among them, air diffusion cathodes (ADC) are usually reported for highly e cient production of H 2 O 2 under extensive range of current densities (Liao et al, 2022). Márquez developed a 3D-like air-diffusion cathode to favor the H 2 O 2 production for Fenton's reaction (Márquez et al, 2020) The special structure of ADC give rise to a three-phase interface for O 2 gas, electrolyte and catalyst, which brings fast O 2 mass transfer from air (An et al, 2019). Our previous work developed a ow-by electrochemical system where O 2 used for H 2 O 2 production is sourced from natural diffusion of air (Jia-xiong & Shi-wei, 2021).…”

Section: Introductionmentioning

confidence: 99%

Singlet oxygen generation for selective oxidation of emerging pollutants in a flow-by electrochemical system based on natural air diffusion cathode

Xie

Yao

2022

Environ Sci Pollut Res

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The decay of free radicals involved in side reactions is one of the challenges faced by electrochemical degradation of organic pollutants. To this end, a non-radical oxidation process was constructed by a natural air diffusion cathode (ADC) and a RuO 2 -Ti anode for cathodic hydrogen peroxide activation by anodic chlorine evolution. The ADC fabricated by the carbon black of BP2000 produced a stable concentration of hydrogen peroxide of 339.94 mg/L (current e ciency of 73.4%) without aeration, which was superior to the cathode made by the carbon black of XC72. The ow-by electrochemical system consisted of an ADC and a RuO 2 -Ti anode showed high selectivity to aniline compared to benzoate.Quenching experiments revealed the main active intermediate responsible for the pollutant degradation was singlet oxygen ( 1 O 2 ), which was also identi ed by the electron spin resonance (ESR) analysis. Finally, the steady-stable content of 1 O 2 was quantitatively determined to be 6.25×10 − 11 M by the method of furfuryl alcohol (FFA) probe. Our ndings provide a fast, low energy consumption and well controlled electrochemical oxidation method for selective degradation of organic pollutants.

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Mineralization of Methyl Orange azo dye by processes based on H2O2 electrogeneration at a 3D-like air-diffusion cathode

Cited by 42 publications

References 46 publications

Recent Achievements in Dyes Removal Focused on Advanced Oxidation Processes Integrated with Biological Methods

Recent Achievements in Dyes Removal Focused on Advanced Oxidation Processes Integrated with Biological Methods

Graphite felt modified by nanoporous carbon as a novel cathode material for the EF process

Singlet oxygen generation for selective oxidation of emerging pollutants in a flow-by electrochemical system based on natural air diffusion cathode

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