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Technical Report

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Powdered Activated Carbon, Trihalomethanes, chloroform, bromoform, bromodichloromethane Dibromochloromethane, THM Precursors, Humic Acid, Direct Aqueous Injection, Solvent Extraction, Gas Chromatography


Studies have been conducted to evaluate powdered activated carbon (PAC) as an agent for controlling trihalomethanes in drinking water. Laboratory studies indicate that PAC is highly efficient in removing free trihalomethanes in water within a few hours. The removal efficiency of humic acid, a known THM precursor, by PAC is considerably less. However, longer treatment time can remove the precursors quite significantly. Humic substances in surface water samples can also be removed by PAC.

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