Electrochemical degradation of perchloroethylene in aqueous media: An approach to different strategies

Sonoelectrochemistry in Environmental Applications

“…Sáez et al studied the effect of ultrasound (20 kHz) at various ultrasonic powers upon the electrochemical degradation of perchloroethylene in aqueous solutions [15]. In this study, the experimental data obtained by SECT were compared with those previously reported electrochemically [16][17][18] and sonochemically [19,20]. In their work, bulk electrolyses were carried out in galvanostatic mode (3.5 mA cm −2 ) using a lead (Pb) cathode and a lead dioxide (PbO 2 ) anode in a well-characterized sonoelectrochemical cell [21,22], which had previously been employed for sonochemical treatment (SCT) [19,20].…”

“…16 Schematic presentation of the reaction mechanism for Cu-EDTA electrodeposition (Reprinted with permission from[58] Copyright (2009) Elsevier Ltd).…”

“…18 Limiting currents plotted against the square root of ultrasonic intensity(20 kHz) for the reduction of silver (4 g L −1 ) on a sonicated cylinder electrode at 298 K for the 'face-on' and 'angular' geometries (Reprinted with permission from[61] Copyright (2003) Elsevier Ltd).…”

Electroreduction of aliphatic chlorides at silver cathodes in water

“…The electrochemical abatement in water can be performed by the anodic oxidation to carbon dioxide, often called ''electrochemical incineration" [2][3][4][5] or the cathodic reduction to de-halogenated aliphatic hydrocarbons [6][7][8][9][10][11][12][13][14][15][16][17][18]. Furthermore, a third electrochemical route, based on the anodic oxidation to carbon dioxide coupled with the cathodic reduction to de-halogenated hydrocarbons, was proposed [19][20][21]. In particular, some of the authors have successfully developed a combined process based on the utilization of silver cathodes and boron doped diamond anodes [19,20].…”

“…The cathodic treatment of waste waters contaminated by chlorinated aliphatic hydrocarbons has been widely investigated by many authors [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. The electrochemical reduction of organic chlorides was performed also in aprotic solvents with the aims of developing friendly electrosynthetic processes [25][26][27][28][29][30]37,47,48] and for wastewater treatment after the separation of pollutants from water and the successive dissolution in suitable organic solvents [17].…”