Iodinated Disinfection Byproducts in Drinking Water in Lake Biwa - Yodo River Basin

Abstract

 A survery on iodinated disinfection byproducts (I-DBPs) and the speciation of iodine in dirnking waters in Lake Biwa - Yodo River Basin was conducted. Dichloroiodomethane concentration ranged from 20 to 253 ng/L. Chloroiodoacetic acid was also found in drinking water at approximately 20 ng/L. Iodoacetic acid, the most genotoxic haloacetic acid, was not detected for all the samples tested. Ozone/glanular activated carbon (GAC) treatment appeared to be effective for the reduction of I-DBPs. Iodate ion was the dominant form of iodine in drinking water. The contribution of unkwon organic iodine to adsorbable organic iodine tended to be larger than the sum of I-DBPs and X-ray contrast media.