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Bromate ion (BrO3-) is a disinfectionbyproduct that is produced whenraw water containing bromide ion(Br-) is ozonated. BrO3- is a concernfor water utilities because it has been classifiedas a class II carcinogen, and the USEnvironmental Protection Agency has establisheda maximum contaminant level (MCL)of 10 ug/L for it in finished water.This study evaluated sulfite ion (SO32-)and reduced iron (Fe2+) as potential removalagents for BrO3- over a wide pH range. Theexperimental rate law for BrO3- removalusing SO32- shows that the rate of removaldecreases with increasing pH. The experimentalrate law for BrO3- removal using Fe2+shows that the rate of removal increases withincreasing pH.The study found that under drinking waterconditions, SO32- is not an effective BrO3-removal agent. However, at drinking waterpH (pH

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Edition: Vol. 94 - No. 2 Published: 02/01/2002 Number of Pages: 8 File Size: 1 file , 420 KB