Electrochemical treatment of aqueous solutions of catechol by various electrochemical advanced oxidation processes: Effect of the process and of operating parameters

Management of solar energy to power electrochemical wastewater treatments

“…However, this may arise operational drawbacks. Regarding electrochemical remediation treatments, higher currents can involve higher mass transfer limitations [60], because they may turn into parasitic secondary reactions and an efficiency drop [11,61,62]. Regarding the RFB charge, higher current densities bring out lower capacities and lower state of charge [63,64].…”

Electrochemical Treatment of Wastewater by ElectroFenton, Photo‐ElectroFenton, Pressurized‐ElectroFenton and Pressurized Photo ElectroFenton: A First Comparison of these Innovative Routes

“…( 2)). [20] According to the literature, [12,[19][20][21][22][23][24] PrEF process is strongly affected by time passed, pressure and current density. For this reason, some PrEF experiments were repeated for an aqueous solution of AO7 for a longer time (15 h) or at a different current density (90 vs. 150 A m À 2 ) or at higher pressures (5 bars) with the following results:…”

“…In previous works, it was shown that various approaches can be attempted to solve or minimize such problems. Various kinds of heterogeneous catalysts have been tested in order to increase the working pH [10–15] . The problem of the low solubility of O 2 in water can be minimized using innovative cathodes, [1,7,16–18] such as gas diffusion electrodes (GDEs) or modified carbon felts (MCF), or advanced cells, such as jet‐ [19] or microfluidic ones [8,20] .…”

“…Various kinds of heterogeneous catalysts have been tested in order to increase the working pH. [10][11][12][13][14][15] The problem of the low solubility of O 2 in water can be minimized using innovative cathodes, [1,7,[16][17][18] such as gas diffusion electrodes (GDEs) or modified carbon felts (MCF), or advanced cells, such as jet- [19] or microfluidic ones. [8,20] In addition, pressurized air can be effectively used in EF (PrEF) to enhance the O 2 solubility in water, and, as a consequence, the generation of H 2 O 2 (by eq.…”

Effective Removal and Mineralization of 8‐Hydroxyquinoline‐5‐sulfonic Acid through a Pressurized Electro‐Fenton‐like Process with Ni−Cu−Al Layered Double Hydroxide

“…The problem of the low solubility of oxygen in water can be minimized using innovative cathodes, including gas diffusion electrodes (GDEs) and modified carbon felts (MCF) or advanced cells, such as jet‐cells, micro fluidic cells and pressurized reactors . Moreover, various heterogeneous catalysts have been tested in order to increase the working pH, including: cheap natural catalysts, such as pyrite and chalcopyrite; synthetic iron‐loaded structures, such as carbon nanotubes; resins, zeolites or biosorbents, zero‐valent ion (ZVI); and, metal‐organic frameworks . However, in most of cases, these materials do not couple high removal of TOC and recyclability.…”