scholarly journals Biodegradation of six haloacetic acids in drinking water

2007 ◽  
Vol 6 (1) ◽  
pp. 15-22 ◽  
Author(s):  
Walt Bayless ◽  
Robert C. Andrews
Keyword(s):  
Drinking Water ◽  
Trichloroacetic Acid ◽  
Distribution Systems ◽  
Water Distribution ◽  
Haloacetic Acids ◽  
Health Concern ◽  
Drinking Water Distribution Systems ◽  
Drinking Water Distribution ◽  
Monobromoacetic Acid ◽  
By Products

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 (HAA6) 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 HAA6. 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.

Evidence of arsenic release promoted by disinfection by-products within drinking-water distribution systems

2014 ◽  
Vol 472 ◽  
pp. 1145-1151 ◽  
Author(s):  
Syam S. Andra ◽  
Konstantinos C. Makris ◽  
George Botsaris ◽  
Pantelis Charisiadis ◽  
Harris Kalyvas ◽  
...  
Keyword(s):  
Drinking Water ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Drinking Water Distribution Systems ◽  
Drinking Water Distribution ◽  
By Products

Tastes and Odors in Drinking Water Distribution Systems Related to the Use of Synthetic Materials

1999 ◽  
Vol 40 (6) ◽  
pp. 203-208 ◽  
Author(s):  
S. Rigal ◽  
J. Danjou
Keyword(s):  
Drinking Water ◽  
Distribution Systems ◽  
Water Distribution ◽  
Cementitious Materials ◽  
Drinking Water Distribution Systems ◽  
Synthetic Materials ◽  
Taste And Odor ◽  
Drinking Water Distribution ◽  
By Products

Plastic pipes, organic coatings and membranes, and epoxy relining products are progressively replacing existing traditional metallic or cementitious materials. Despite existing controls, and for different reasons, additives, solvents, or monomers can be leached into the drinking water. Until ten years ago, such problems frequently occurred. French regulations now oblige the manufacturers to obtain approvals for their products for contact with drinking water, and such problems now occur less and less. The objectives of this research were to investigate the causes of odor and flavor problems generated in distribution systems, water towers, and lined systems. Four case studies and an experimental study of taste and odor deterioration of water quality are presented to identify the responsible substances related to materials. In each case study, organic components which characterized the cause of the problems were measured experimentally. Components (e.g., styrene and chlorinated by-products) resulting in a high TON/TFN were identified as the chemicals responsible for the cause of odor and flavor problems.

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