Electrochemical activation of peroxymonosulfate with ACF cathode: Kinetics, influencing factors, mechanism, and application potential

Janus electrocatalytic flow-through membrane enables highly selective singlet oxygen production

“…Current approaches for 1 O 2 production mainly include (i) photosensitization using elaborately designed photosensitizers (e.g., molecular dyes 13 or quantum nanodots 14 ) for visible or UVA light adsorption 8,15 and (ii) enzymatic reactions (e.g., peroxidases 16 and oxygenases 17 catalysis) in biological systems, relying on rigorous pH and temperature conditions of the intracellular environment 7,18 . While both approaches face challenges for industrial scale-up, electrocatalysis (EC), a highly automated and facile technology, could offer more approachable 1 O 2 production pathways [19][20][21] . Specifically, EC enables the flexible generation of critical 1 O 2 precursors, such as hydrogen peroxide 22,23 and hypochlorite 20,24 .…”

“…Specifically, EC enables the flexible generation of critical 1 O 2 precursors, such as hydrogen peroxide 22,23 and hypochlorite 20,24 . In addition, as an alternative to photoexcitation or chemiexcitation, EC provides efficient electro-excitation to 1 O 2 precursors, such as cathodic activation of peroxymonosulfate 21 and anodic excitation of ferrocene 25 .…”

“…Present EC pathways rely on high dosages of precursors, which compromise the environmental sustainability of EC 26,27 . Further, for effective oxidation of target molecules by the in situ generated 1 O 2 , EC currently requires long reaction times (range of hours) and consequently consumes high electric energy 20,21 . Therefore, it is critical to improving EC efficacy by eliminating the use of chemicals, significantly shortening residence time, and enhancing the Faradaic efficiency of the process.…”

Physico‐chemical processes

“…The validated theoretical model had the potential to predict the electro-assisted adsorption performance under complex conditions. Liu, Ding, et al (2019) developed and examined an integrated wastewater treatment process (E-ACF-PMS) which combined PMS and an activated carbon fiber (ACF) electrolysis cathode to remove carbamazepine (CBZ). The E-ACF-PMS process utilized much less energy than the E-ACF-PDS process (PDS: peroxydisulfate), and ACF material maintained excellent adsorption and catalytic ability.…”

Treatment of hydraulic fracturing flowback fluid by Fe0-persulfate (PS) process

“…But they are limited by high capital or operating cost. Over the last decade, a great deal of interest was focused on the degradation of toxic and refractory pollutants with the advanced oxidation processes (AOPs) [13][14][15]. It has been reported that zero-valent iron (Fe 0 ) as an environmental friendly, high reductive capacity and inexpensive material has been extensively applied to treatment/remediation of wastewater and could greatly enhanced the degradation efficiency of pollutants in wastewater [16][17][18].…”