Electrochemical degradation of chlorophenoxy and chlorobenzoic herbicides in acidic aqueous medium by the peroxi-coagulation method

Transformation characteristics of refractory pollutants in plugboard wastewater by an optimal electrocoagulation and electro-Fenton process

“…In contrast, only slight removal of COD was observed at pH 6.5. This result is consistent with the one reported for electro-Fenton treatments of trichlorophenoxyacetic acid (Brillas et al, 2003).…”

Mineralization of an azo dye Acid Red 14 by photoelectro-Fenton process using an activated carbon fiber cathode

“…In recent years indirect electrooxidation methods with hydrogen peroxide electrogeneration, such as electro-Fenton (EF) and photoelectro-Fenton (PEF) reactions, are being developed for the treatment of toxic and refractory organic pollutants in acid waters . In these environmentally friendly electrochemical techniques, hydrogen peroxide is continuously generated in an acidic contaminated solution from the two-electron reduction of O 2 which takes place on graphite [3][4][5], reticulated vitreous carbon [6][7][8][9], mercury pool [10][11][12], carbon-felt [13][14][15][16][17][18] O 2 -diffusion [19][20][21][22][23][24][25][26][27][28][29] and activated carbon fiber (ACF) [30] cathodes. In acidic aqueous medium the oxidation power will be enhanced by addition of ferrous ions to the solution that allows the production of a very reactive one-electron oxidizing agent hydroxyl radical ( OH) (E8 = 2.8 V/NHE) from the well-known Fenton reaction between both species with a secondorder rate constant k 2 = 53 M À1 s À1 [11].…”

Modified halloysite as an adsorbent for prometryn from aqueous solutions

“…Attempts have been made of their disposal using different methods: physical -through infiltration (Krutz et al, 2003;Peña et al, 2011), coagulation (Brillas et al, 2003;Hladik et al, 2005), biological -for phytoremediation (Chuluun et al, 2009), culture macrophytes (Beketov and Liess, 2008;Matby et al, 2009;Brogan and Relyea, 2013), and the use of biotechnological methods (Hladik et al, 2005;Kanissery and Sims, 2011;Nawaz et al, 2011). For many years, the studies on the use of adsorbents for the removal of various herbicides from water have been conducted.…”