Use of aqueous hydrogen peroxide solutions prepared by cathodic reduction of oxygen for indirect oxidation of chemical substances in situ: Achievements and prospects

Kornienko, V. L.; Kolyagin, G. A.; Kornienko, G. V.; Chaenko, N. V.; Kosheleva, A. M.; Кенова, Т. А.; Васильева, И. С.

doi:10.1134/s1070427214010017

Cited by 15 publications

(5 citation statements)

References 54 publications

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“…Although the literature is replete with studies concerning the generation of H 2 O 2 and the degradation of organic pollutants, the experiments were generally performed in batch mode in which a single volume of electrolyte was recirculated over the electrodes throughout the experimental period in order to achieve the efficiencies reported [26][27][28]30,[39][40][41][42]44]. However, application of a batch mode system in the treatment of a high volume or a continuous stream of wastewater is extremely limited.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, using this type of electrode it is possible to regulate the amount of H 2 O 2 generated for the proposed degradation process by modifying the experimental conditions, particularly the potential/current applied and the flow rate. Not only is the GDE versatile and easy to install, but the same electrode can generate H 2 O 2 in cells and electrochemical reactors using different aqueous electrolytes under constant current or potential and with flow rates ranging from a few milliliters to hundreds of liters per hour [35][36][37][38][39][40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

“…Batch mode is most effective when the volume of electrolyte is fixed and/or small in comparison with the electrode area, and high levels of organic compound removal can be achieved using this method. On the other hand, batch operation presents severe limitations when high or continuous volumes of electrolyte must to be treated and, in certain cases, it is not possible to complete the process using this mode [35][36][37][38][39][40][41][42][43][44][45][46].…”

Section: Introductionmentioning

confidence: 99%

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New operational mode of an electrochemical reactor and its application to the degradation of levofloxacin

Rocha

Valim

Trevelin

et al. 2017

Journal of Environmental Chemical Engineering

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The flow-by electrochemical reactor is generally used in batch mode with extended process time in order to achieve high efficiency in the removal of organic contaminant from aqueous solution. Moreover, the batch mode system is inappropriate for the treatment of wastewater in high volume or as a continuous stream. This paper presents a new operational mode for the electrochemical reactor in which the electrolyte passes over the electrodes just once at a reduced flow rate and with high hydraulic retention time. The concentration of hydrogen peroxide generated in the reactor running in the single-pass flow mode attained 10.2 mg L −1 cm −2 in acid medium, a value similar to that obtained previously with the same type of reactor operating in batch mode. In the single-pass mode, the electrochemical reactor showed high rates of removal of the antibiotic levofloxacin (initial 50 mg L −1) and organic load (initial 130 mg L −1) up to 99 and 86%, respectively, when operated under electro-or photo-Fenton degradation conditions (acid medium with Fe 2+ ions; absence or presence of UV irradiation). Degradation of levofloxacin generated high levels of nitrate (up to 4.5 mg L −1) and various byproducts that could be identified by liquid chromatography-mass spectrometry.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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New operational mode of an electrochemical reactor and its application to the degradation of levofloxacin

Rocha

Valim

Trevelin

et al. 2017

Journal of Environmental Chemical Engineering

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“…206 Because of its high but limited oxidation power, electrogenerated H 2 O 2 has been primarily employed for the oxidative partial transformation of organics in divided cells, such as that of maleic acid to malic acid, formaldehyde to formic acid, and phenol to organic acids and ketones. 207 However, the H 2 O 2 electrogeneration for water decontamination finds its main application in the use of undivided cells since coupling with other reactions/processes, especially the EF-based methods, very significantly enhances the oxidation ability of the system (see subsection 4.2.2).…”

Section: ′ +mentioning

confidence: 99%

Single and Coupled Electrochemical Processes and Reactors for the Abatement of Organic Water Pollutants: A Critical Review

et al. 2015

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Traditional physicochemical and biological techniques, as well as advanced oxidation processes (AOPs), are often inadequate, ineffective, or expensive for industrial water reclamation. Within this context, the electrochemical technologies have found a niche where they can become dominant in the near future, especially for the abatement of biorefractory substances. In this critical review, some of the most promising electrochemical tools for the treatment of wastewater contaminated by organic pollutants are discussed in detail with the following goals: (1) to present the fundamental aspects of the selected processes; (2) to discuss the effect of both the main operating parameters and the reactor design on their performance; (3) to critically evaluate their advantages and disadvantages; and (4) to forecast the prospect of their utilization on an applicable scale by identifying the key points to be further investigated. The review is focused on the direct electrochemical oxidation, the indirect electrochemical oxidation mediated by electrogenerated active chlorine, and the coupling between anodic and cathodic processes. The last part of the review is devoted to the critical assessment of the reactors that can be used to put these technologies into practice.

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“…Hydrogen peroxide (H2O2) can be electro-generated by oxygen reduction reaction on carbonaceous cathodes as demonstrated early in 1882 by M. Traube [1,2]. Over the years, this synthesis route has attracted interest for in situ preparation of aqueous solutions for different purposes [2][3][4][5], to enhance the production of peracetic from acetic acid [6,7] and, especially, in electro-Fenton and related technologies [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

The pressurized jet aerator: A new aeration system for high-performance H2O2 electrolyzers

Pérez

Llanos

Sáez

et al. 2018

Electrochemistry Communications

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Use of aqueous hydrogen peroxide solutions prepared by cathodic reduction of oxygen for indirect oxidation of chemical substances in situ: Achievements and prospects

Cited by 15 publications

References 54 publications

New operational mode of an electrochemical reactor and its application to the degradation of levofloxacin

New operational mode of an electrochemical reactor and its application to the degradation of levofloxacin

Single and Coupled Electrochemical Processes and Reactors for the Abatement of Organic Water Pollutants: A Critical Review

The pressurized jet aerator: A new aeration system for high-performance H2O2 electrolyzers

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