Very different ratios of chlorite and chlorate levels have been produced from similar doses of ClO 2 applied at different sites or in different municipalities, depending on a number of elements specific to each. PAC have been used to chemically reduce the chlorite or chlorate levels in water treated by ClO 2 . The sulfur compounds may require excessive pH depression to be feasible for reduction of the chlorite ion levels. GAC, while effectively stripping ClO 2 and chlorite from the water, may present an additional cost as a chlorine dioxide related DBP removal technology, due to the relatively short bed life before break through of the chlorite ion. In summary, all water treatment strategies will result in the formation of disinfection by-products.
Chlorine dioxide is no exception.
Thus, the ability to effectively handle disinfection by-products produced in the process, the dramatic reduction of organic products from the process and the strong disinfection strength of chlorine dioxide makes this chemical good candidate for disinfecting water sources.