Assessing adsorbable organic halogen formation and precursor removal during drinking water production

Jose Farre, Maria, Lyon, Bonnie, de Vera, Glen A., Stalter, Daniel and Gernjak, Wolfgang (2016) Assessing adsorbable organic halogen formation and precursor removal during drinking water production. Journal of Environmental Engineering (United States), 142 3: 04015087-1-04015087-9. doi:10.1061/(ASCE)EE.1943-7870.0001022


Author Jose Farre, Maria
Lyon, Bonnie
de Vera, Glen A.
Stalter, Daniel
Gernjak, Wolfgang
Title Assessing adsorbable organic halogen formation and precursor removal during drinking water production
Journal name Journal of Environmental Engineering (United States)   Check publisher's open access policy
ISSN 0733-9372
1943-7870
Publication date 2016-03-01
Year available 2015
Sub-type Article (original research)
DOI 10.1061/(ASCE)EE.1943-7870.0001022
Open Access Status Not Open Access
Volume 142
Issue 3
Start page 04015087-1
End page 04015087-9
Total pages 9
Place of publication Reston, VA United States
Publisher American Society of Civil Engineers (ASCE)
Collection year 2016
Language eng
Formatted abstract
Adsorbable organic halogens (AOX) were measured at the outlet (AOXo) and after 24 h contact time with residual disinfectant (AOX24 h) for 10 samples obtained from 7 drinking water treatment plants (WTPs) that employ chlorine-based disinfectants. AOXo ranged from 0.75 to 7.60 μM (26.2–266.0 μg Cl=L) and increased by up to 170% after 24 h contact time. The results were also compared with AOX formation potential (AOXFP) measured in the laboratory for the samples collected prior to disinfection at the same WTPs. In general, AOX24 h and AOXFP values varied by less than 20%. A suite of disinfection byproducts (DBPs) were individually measured to elucidate the AOX composition. Trihalomethanes and haloacetic acids explained the largest fraction of AOX; however, the percentage of AOX not accounted for by measured DBPs varied greatly between samples (14.5–62.0%). Additionally, the fate of AOXFP was assessed across the seven WTPs. On average, coagulation removed 67 7% of AOXFP across the WTPs, while dual media filtration did not substantially remove AOXFP. The effect of ozone on AOXFP varied between WTPs, while biological activated carbon filtration removed 33 13% AOXFP. The ratio of known versus unknown AOXFP did not change across the WTPs.
Keyword Adsorbable organic halogen (AOX)
Total organic halogen (TOX)
Drinking water
Disinfection byproducts
Formation potential
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

 
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