Biodegradation of six haloacetic acids in drinking water

Haloacetic acids (HAAs) are produced by the reaction of chlorine with natural organic matter and are regulated disinfection by-products of health concern. Biofilms in drinking water distribution systems and in filter beds have been associated with the removal of some HAAs, however the removal of all...

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Bibliographic Details
Published in:Journal of water and health 2008-03, Vol.6 (1), p.15-22
Main Authors: Bayless, Walt, Andrews, Robert C
Format: Article
Language:English
Subjects:
Acetates - chemistry
Acetic acid
Acids
Biodegradability
Biodegradation
Biodegradation, Environmental
Biofilms
By-products
Chlorine
Disinfection
Drinking water
Haloacetic acids
Halogenated compounds
Halogens
Organic matter
Removal
Trichloroacetic acid
Water distribution
Water distribution systems
Water engineering
Water purification
Water Purification - methods
Water Supply
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Summary:Haloacetic acids (HAAs) are produced by the reaction of chlorine with natural organic matter and are regulated disinfection by-products of health concern. Biofilms in drinking water distribution systems and in filter beds have been associated with the removal of some HAAs, however the removal of all six routinely monitored species (HAA(6)) has not been previously reported. In this study, bench-scale glass bead columns were used to investigate the ability of a drinking water biofilm to degrade HAA(6). Monochloroacetic acid (MCAA) and monobromoacetic acid (MBAA) were the most readily degraded of the halogenated acetic acids. Trichloroacetic acid (TCAA) was not removed biologically when examined at a 90% confidence level. In general, di-halogenated species were removed to a lesser extent than the mono-halogenated compounds. The order of biodegradability by the biofilm was found to be monobromo > monochloro > bromochloro > dichloro > dibromo > trichloroacetic acid.
ISSN:1477-8920
1996-7829
DOI:10.2166/wh.2007.002