Mineral cathodic electro-precipitation and its kinetic modelling in thin-film microfluidic reactor during advanced electro-oxidation process

Electrosorption of phenolic compounds from olive mill wastewater: Mass transport consideration under a transient regime through an alginate-activated carbon fixed-bed electrode

“…This H 2 electrogeneration reaction limits the availability of the active sites on the cathode surface (Adnan et al, 2021a;Hazourli et al, 1996). The involvement of this faradaic reaction therefore strongly reduced the electrosorption capacity to 73 mg g -1 , which was even lower than that under OC conditions (123 mg g -1 ).…”

“…The fittings of the models with experimental results were evaluated with the root mean square error (RMSE) as written in Eq. 14 (Adnan et al, 2021a):…”

A critical review on the electrosorption of organic compounds in aqueous effluent – Influencing factors and engineering considerations

“…Diffusion (i.e., species subjected to a concentration gradient in the vicinity of the electrode), electromigration (i.e., ions subjected to a gradient of the electrostatic potential) and convection (i.e., global fluid movement in the bulk) phenomena can occur in the electrochemical reactor, which has been formalized by the Nernst-Planck equation (Bard and Faulkner, 2001). Most of the time, diffusion and/or electromigration of organic species in diluted media are limited steps before subsequent electrosorption (Adnan et al, 2021a;Alagesan et al, 2021;Coeuret, 2003;Mousset et al, 2019a;Panizza et al, 2001).…”

“…Often missing in the literature and especially in reviews dealing with faradaic reactions involved in capacitive deionization (Zhang et al, 2018b): the local alkalization at the cathode from O 2 reduction and H 2 O reduction reactions should not be overlooked. Under this condition, magnesium, calcium and/or carbonate are present in solution, which is the case in many actual aqueous effluents (Adnan et al, 2021a;Belarbi et al, 2016), and electroprecipitation phenomena can occur by forming Mg(OH) 2 and/or CaCO 3 at the cathode surface (Adnan et al, 2021a;Belarbi et al, 2016). These deposits then progressively passivate the cathode and hamper electrolysis.…”

Unprecedented roles of submillimetric interelectrode distances and electrogenerated gas bubbles on mineral cathodic electro-precipitation: Modeling and interface studies

“…The studies were done in a flow plant equipped with commercial undivided cell possessing electrodes with 100 cm 2 surface area. Our recent work [46] was the first to illustrate the occurrence of mineral scaling inside a parallel-plate (surface area: 50 cm 2 ) microfluidic reactor at a given d elec (500 µm) where the influence of electrolytic composition and current density were scrutinized. To the best of authors' knowledge, no report has yet been published to discuss the variation of mineral deposition with d elec lower than 5 mm, especially at submillimetric distances that imply a different mass transfer behavior.…”