Abstract
Profiles are given for the distribution of chloroform, weak organic acids, and polychlorinated biphenyls (PCBs) on granular activated carbon (GAC) samples from four pilot columns, placed in series and operated for 26 weeks at Waterford, NY. Chloroform and the weak organic acids are found at or near saturation through most of the GAC system, whereas the PCBs are accumulated only at the inlet. The extent of saturation achieved by these compounds is consistent with differences in their mass inputs and GAC capacities. However, irregularities in adsorption of these substances are evident in localized depletions of chloroform and the weak organic acids at the inlet to the system. Displacement of chloroform from the GAC inlet after 26 weeks' operation is confirmed by analysis of breakthrough data for the trihalomethanes.
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