Interactions between organic model compounds and ion exchange resins

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dc.contributor.authorFinkbeiner, Pascal
dc.contributor.authorMoore, Graeme
dc.contributor.authorTseka, Tebogo
dc.contributor.authorNkambule, Thabo
dc.contributor.authorDe Kock, Lueta-Ann
dc.contributor.authorJefferson, Bruce
dc.contributor.authorJarvis, Peter Robert
dc.date.accessioned2019-07-31T15:42:44Z
dc.date.available2019-07-31T15:42:44Z
dc.date.issued2019-07-22
dc.description.abstractIon exchange (IEX) can successfully remove natural organic matter (NOM) from surface water. However, the removal mechanism is not well understood due to the complexity and variability of NOM in real source waters as well as the influence of multiple parameters on the removal behaviour. For example, this includes the physicochemical properties of the NOM and IEX resin, and the presence of competing anions. Model compounds with a range of physical and chemical characteristics were therefore used to determine the mechanisms of NOM removal by IEX resins. Fifteen model compounds were selected to evaluate the influence of hydrophobicity, size and charge of organic molecules on the removal by ion exchange, both individually and in mixtures. Three different resins, comprising polystyrene and polyacrylic resin of macroporous and gellular structure, showed that charge density (CD) was the most important characteristic that controlled the removal, with CD of >5 meq mgDOC-1 resulting in high removal (≥89%). Size exclusion of compounds with high MW (≥8 kDa) was evident. The hydrophobicity of the resin and model compound was particularly important for removal of neutral molecules such as resorcinol, which was best removed by the more hydrophobic polystyrene resin. Relationships were identified that provided explanations of the interactions observed between NOM and IEX resin in real waters.en_UK
dc.identifier.citationFinkbeiner P, Moore G, Tseka T, et al., (2019) Interactions between organic model compounds and ion exchange resins. Environmental Science and Technology, Volume 53, Issue 16, July 2019, pp. 9734-9743en_UK
dc.identifier.cris24015616
dc.identifier.issn0013-936X
dc.identifier.urihttps://doi.org/10.1021/acs.est.9b02139
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/14405
dc.language.isoenen_UK
dc.publisherACSen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjection exchangeen_UK
dc.subjectmodel compounden_UK
dc.subjectnatural organic matteren_UK
dc.titleInteractions between organic model compounds and ion exchange resinsen_UK
dc.typeArticleen_UK

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