Sorptive removal of disinfection by-product precursors from UK lowland surface waters: impact of molecular weight and bromide

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dc.contributor.authorCarra, Irene
dc.contributor.authorLozano, Javier Fernandez
dc.contributor.authorJohannesen, Scott
dc.contributor.authorGodart-Brown, Max
dc.contributor.authorGoslan, Emma H.
dc.contributor.authorJarvis, Peter
dc.contributor.authorJudd, Simon J.
dc.date.accessioned2020-09-10T15:35:38Z
dc.date.available2020-09-10T15:35:38Z
dc.date.issued2020-09-05
dc.description.abstractThe current study compared the impact of three different unit processes, coagulation, granular activated carbon (GAC), and a novel suspended ion exchange (SIX) technology, on disinfection by-product formation potential (DBPFP) from two UK lowland water sources with medium to high bromide content. Specific attention was given to the influence of the organic molecular weight (MW) fraction on DBPFP as well as the impact of bromide concentration. Whilst few studies have investigated the impact of MW fractions from Liquid Chromatography with Organic Carbon Detection (LC-OCD) analysis on dissolved organic carbon (DOC) removal by different processes, none have studied the influence of DOC MW fractions from this analysis on DBP formation. The impact of higher bromide concentration was to decrease the total trihalomethane (THM) and haloacetic acid (HAA) mass concentration, in contrast to previously reported studies. Results indicated that for a moderate bromide concentration source (135 μg/L), the THM formation potential was reduced by 22% or 64% after coagulation or SIX treatment, respectively. For a high bromide content source (210 μg/L), the THM formation potential removal was 47% or 69% following GAC and SIX treatment, respectively. The trend was the same for HAAs, albeit with greater differences between the two processes/feedwaters with reference to overall removal. A statistical analysis indicated that organic matter of MW > 350 g/mol had a significant impact on DBPFP. A multiple linear regression of the MW fractions against DBPFP showed a strong correlation (R2 between 0.90 and 0.93), indicating that LC-OCD analysis alone could be used to predict DBP formation with reasonable accuracy, and offering the potential for rapid risk assessment of water sourcesen_UK
dc.identifier.citationCarra I, Fernandez Lozano J, Johannesen S, et al., (2021) Sorptive removal of disinfection by-product precursors from UK lowland surface waters: impact of molecular weight and bromide. Science of the Total Environment, Volume 754, February 2021, Article number 142152en_UK
dc.identifier.issn0048-9697
dc.identifier.urihttps://doi.org/10.1016/j.scitotenv.2020.142152
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/15782
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectDisinfection by-productsen_UK
dc.subjectLC-OCDen_UK
dc.subjectOrganic matteren_UK
dc.subjectMolecular weighten_UK
dc.subjectIon exchangeen_UK
dc.titleSorptive removal of disinfection by-product precursors from UK lowland surface waters: impact of molecular weight and bromideen_UK
dc.typeArticleen_UK

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