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Adsorption isotherm and field tests were conducted to investigate removal of haloacetic acids(HAAs) in the initial stage of granular activated carbon (GAC) filtration. Results from laboratoryand field tests indicated that GAC adsorption plays only a minor role in overall HAA removalin GAC filters. In addition, HAAs (except trichloroacetic acid) had a much lower adsorptioncapacity than did trihalomethanes. Adsorption capacity for HAAs increased with increasinghalogen number. Chlorinated HAA species had a lower adsorption capacity than did theirbrominated analogues. HAA removal in aged GAC filters may be attributable to biodegradation. Includes 19 references, tables, figures.

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Edition: Vol. 98 - No. 6 Published: 06/01/2006 Number of Pages: 6File Size: 1 file , 250 KB