The combined influence of hydrophobicity, charge and molecular weight on natural organic matter removal by ion exchange and coagulation

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dc.contributor.authorFinkbeiner, Pascal
dc.contributor.authorMoore, Graeme
dc.contributor.authorPereira, Ryan
dc.contributor.authorJefferson, Bruce
dc.contributor.authorJarvis, Peter
dc.date.accessioned2019-08-30T10:55:35Z
dc.date.available2019-08-30T10:55:35Z
dc.date.issued2019-08-21
dc.description.abstractThree different source waters were investigated using virgin and pre-used anion exchange resins, coagulation, and ion exchange combined with coagulation (IEX&Coagulation). The hydrophobicity, size distribution and charge of natural organic matter (NOM) were used to evaluate its removal. Dissolved organic carbon (DOC) removal by pre-used IEX resin was 67–79%. A consistent ratio of different hydrophobicity fractions was found in the removed DOC, while the proportion and quantity of the molecular weight fraction around 1 kDa was important in understanding the treatability of water. For pre-used resin, organic compounds were hypothesised to be restricted to easily accessible exchange sites. Comparatively, virgin resin achieved higher DOC removals (86–89%) as resin fouling was absent. Charge density and the proportion of the hydrophobic fraction were found to be important indicators for the specific disinfection byproduct formation potential (DBP-FP). Treatment of raw water with pre-used resin decreased the specific DBP-FP by between 2 and 43%, while the use of virgin resin resulted in a reduction of between 31 and 63%. The highest water quality was achieved when the combination of IEX and coagulation was used, reducing DOC and the specific DBP-FP well below that seen for either process alone.en_UK
dc.identifier.citationFinkbeiner P, Moore G, Pereira R, et al., (2020) The combined influence of hydrophobicity, charge and molecular weight on natural organic matter removal by ion exchange and coagulation. Chemosphere, Volume 238, January 2020, Article number 124633en_UK
dc.identifier.issn0045-6535
dc.identifier.urihttps://doi.org/10.1016/j.chemosphere.2019.124633
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/14488
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.subjection exchangeen_UK
dc.subjectcharge densityen_UK
dc.subjectnatural organic matteren_UK
dc.subjectdisinfection byproductsen_UK
dc.titleThe combined influence of hydrophobicity, charge and molecular weight on natural organic matter removal by ion exchange and coagulationen_UK
dc.typeArticleen_UK

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