ANALYSIS OF DISINFECTION BY-PRODUCTS IN WATER AND WASTE-WATER

Several analytical methods have been utilized to study the products from the chlorination of water from a southern U.S.A. reservoir. Low molecular weight fragments have been assayed by GC/MS following resin accumulation under acidic or basic conditions. High molecular weight products before and after chlorination have been investigated using size HPLC with aqueous solvent and passivated controlled porosity silica columns. The results show a slight lowering of average molecular weight after chlorination, but more importantly, a nearly uniform level of organic chlorine through the polymer. Total organic halogen measurements confirm that the ratio of non-volatile halogen to trihalomethane halogen is at least 2:1 in all cases studied. The °zonation and photolytic °zonation products of 2, 4, 6, 2‘, 46’-hexachloro- biphenyl have been determined and a reaction scheme proposed. © 1979, Taylor & Francis Group, LLC. All rights reserved.