AWWA WQTC71620

The electrochemical oxidation of water containing chloride (Cl^-) ions has emerged as a potential disinfection and oxidation strategy in which the mixed oxidants, such as ozone, chlorine, and •OH, are generated on-site (Kerwick et al., 2005). However, the formation of harmful disinfection byproducts such as chlorate (ClO₃^-) and perchlorate (ClO₄^-) represents an undesirable side of this process. This study investigates the characteristic of chlorate formation in electrochemical processes using Cl^-. In detail, the effects of the following parameters on chlorate formation were investigated: the mixed oxidants (O₃, HOCl/OCl^-, and •OH), dissolved organic carbon (DOC; 0, 1.5, and 2.2 mg L^-1), pH values (3.6, 5.5, 7.0, 8.0, and 9.0).