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

Changes in disinfectant type could trigger a cascade of reactions releasing pipe-anchored metals/metalloids into finished water. However, the effect of pre-formed disinfection by-products on the release of sorbed contaminants (arsenic-As in particular) from drinking water distribution system pipe sc...

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Bibliographic Details
Published in:The Science of the total environment 2014-02, Vol.472, p.1145-1151
Main Authors: Andra, Syam S., Makris, Konstantinos C., Botsaris, George, Charisiadis, Pantelis, Kalyvas, Harris, Costa, Costas N.
Format: Article
Language:English
Subjects:
Applied sciences
Arsenic
Arsenic - analysis
Biofilm
Biofilms
Disinfection - methods
Disinfection by-products
Drinking Water - chemistry
Drinking Water - microbiology
Drinking water and swimming-pool water. Desalination
Drinking water distribution system
Exact sciences and technology
Pipe scales
Pollution
Pseudomonas aeruginosa
Water and health
Water Pollutants, Chemical - analysis
Water Purification - methods
Water Supply
Water treatment and pollution
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Summary:Changes in disinfectant type could trigger a cascade of reactions releasing pipe-anchored metals/metalloids into finished water. However, the effect of pre-formed disinfection by-products on the release of sorbed contaminants (arsenic-As in particular) from drinking water distribution system pipe scales remains unexplored. A bench-scale study using a factorial experimental design was performed to evaluate the independent and interaction effects of trihalomethanes (TTHM) and haloacetic acids (HAA) on arsenic (As) release from either scales-only or scale-biofilm conglomerates (SBC) both anchored on asbestos/cement pipe coupons. A model biofilm (Pseudomonas aeruginosa) was allowed to grow on select pipe coupons prior experimentation. Either TTHM or HAA individual dosing did not promote As release from either scales only or SBC, detecting
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2013.11.045