Iron removal from waters by electrocoagulation: Investigations of the various physicochemical phenomena involved

Electrocoagulation as a green technology for phosphate removal from river water

“…To meet these limitations, a broad range of technologies have been applied to remove phosphate from water and wastewater, such as adsorption (Xu et al, 2016;Ooi et al, 2017), microalgae cultivation (Wang et al, 2016) and reverse osmosis (Gautam et al, 2014). Among this wide spectrum of phosphate removal methods, interest in electrocoagulation technology (EC) is growing as a promising alternative as it poses advantages that eliminate the drawbacks of traditional methods (Kobya et al, 2010;Coman et al, 2013;Hashim et al, 2016;Doggaz et al, 2018).…”

Heavy metal adsorption ability of a new composite material based on starch strengthened with chemically modified cellulose

“…There are many well-known processes regarding the treatments of contaminated wastewaters like membrane filtration, 1-4 chemical precipitation, [5][6][7] electrocoagulation, [8][9][10][11][12] reverse osmosis, [13][14][15] adsorbtion, [16][17][18][19][20][21][22][23][24] ion exchange, [25][26][27] etc., all of them with their inherent advantages and disadvantages. At the same time, most of them are not suitable for developing countries due to huge cost investment in terms of use of chemicals, infrastructure, and operation.…”

Removal of heavy metals by electrocoagulation from hydrogenocarbonate-containing waters: Compared cases of divalent iron and zinc cations

“…The cell and the device used for electrocoagulation tests has been described in previous papers (Doggaz et al 2018a): the solution to be treated (2 L) was circulated continuously in a circuit comprising the EC cell provided by two parallel (15*7 cm 2 ) Al-4%Cu alloy plates, a peristaltic pump and a tank. The 1 cm gap allowed reasonable ohmic drop in the cell during the chronopotentiometric tests conducted at 1.5 mA/cm 2 with the DC current supply (AFX 2930 SB).…”

“…The case of divalent iron differs from the above metal cations because of the capacity of divalent iron to oxidize by air oxygen to poorly soluble iron hydroxide for pH as low as 4. In a previous paper (Doggaz et al 2018a), the formation of Fe(OH)2 in the vicinity of the cathode surface was shown to contribute greatly to Fe 2+ removal in EC processes in chloride or sulfate-containing waters, whereas liquid phase oxidation of Fe 2+ cations by air oxygen was found little significant because of the too moderate water pH. On the contrary Fe 2+ cations adsorbed on Al(OH)3 flocs and solid Fe(OH)2 are efficiently oxidized to Fe(OH)3.…”