Predictive models for water sources with high susceptibility for bromine-containing disinfection by-product formation: implications for water treatment

Watson, Kalinda, Farre, Maria Jose, Birt, James, McGree, James and Knight, Nicole (2014) Predictive models for water sources with high susceptibility for bromine-containing disinfection by-product formation: implications for water treatment. Environmental Science and Pollution Research, 22 3: 1963-1978. doi:10.1007/s11356-014-3408-4


Author Watson, Kalinda
Farre, Maria Jose
Birt, James
McGree, James
Knight, Nicole
Title Predictive models for water sources with high susceptibility for bromine-containing disinfection by-product formation: implications for water treatment
Journal name Environmental Science and Pollution Research   Check publisher's open access policy
ISSN 0944-1344
1614-7499
Publication date 2014-08-28
Year available 2014
Sub-type Article (original research)
DOI 10.1007/s11356-014-3408-4
Open Access Status
Volume 22
Issue 3
Start page 1963
End page 1978
Total pages 16
Place of publication Heidelberg Germany
Publisher Springer
Collection year 2015
Language eng
Abstract This study examines a matrix of synthetic water samples designed to include conditions that favour brominated disinfection by-product (Br-DBP) formation, in order to provide predictive models suitable for high Br-DBP forming waters such as salinity-impacted waters. Br-DBPs are known to be more toxic than their chlorinated analogues, in general, and their formation may be favoured by routine water treatment practices such as coagulation/flocculation under specific conditions; therefore, circumstances surrounding their formation must be understood. The chosen factors were bromide concentration, mineral alkalinity, bromide to dissolved organic carbon (Br/DOC) ratio and Suwannee River natural organic matter concentration. The relationships between these parameters and DBP formation were evaluated by response surface modelling of data generated using a face-centred central composite experimental design. Predictive models for ten brominated and/or chlorinated DBPs are presented, as well as models for total trihalomethanes (tTHMs) and total dihaloacetonitriles (tDHANs), and bromide substitution factors for the THMs and DHANs classes. The relationships described revealed that increasing alkalinity and increasing Br/DOC ratio were associated with increasing bromination of THMs and DHANs, suggesting that DOC lowering treatment methods that do not also remove bromide such as enhanced coagulation may create optimal conditions for Br-DBP formation in waters in which bromide is present.
Keyword Trihalomethanes
Haloacetonitriles
Br/DOC ratio
Chlorination DBPs
Response surface methodology
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online ahead of print 28 Aug 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
Advanced Water Management Centre Publications
 
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