The electrochemical reaction only requires one precursor chemical and electrical power and has by-products of caustic and hydrogen. The presence of chlorine will produce chlorinated organic reaction by-products which are not desired. In the chlorine-chlorite reaction, chlorine will be present with chlorine dioxide in the treated water. The positive aspect of this reaction, is that the chlorine dioxide produced is chlorine free. In the 2-chemical acid-chlorite reaction, excess acid will be dosed into the water with the chlorine dioxide, which may necessitate pH correction afterwards. The excess reactant continues through into the water when chlorine dioxide is dosed. In the chlorine-chlorite reaction, a small excess of chlorine (approx. In the 2-chemical acid-chlorite reaction, excess acid is used to drive the reaction to completion. ① + ② (combined) 2ClO 2 – + 2H 2O → 2ClO 2 + H 2 + 2OH –ĢNaClO 2 + HOCl + HCl → 2ClO 2 + 2NaCl + H 2O ② Cathode (reduction): 2H 2O + 2e – → H 2 + 2OH – ① Anode (oxidation): ClO 2 – → ClO 2 + e – Please click on the links for information on systems we provide Electrochemical However, not all of these are commercially suitable for water treatment or water disinfection. There are a large number of Chlorine Dioxide generation reactions.
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