Effect of elevated UV dose and alkalinity on metaldehyde removal and THM formation with UV/TiO2 and UV/H2O2

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dc.contributor.authorJefferson, Bruce
dc.contributor.authorJarvis, Peter
dc.contributor.authorBhagianathan, Govind Kannoly
dc.contributor.authorSmith, Heather M.
dc.contributor.authorAutin, Olivier
dc.contributor.authorGoslan, Emma Harriet
dc.contributor.authorMacAdam, Jitka
dc.contributor.authorCarra, Irene
dc.date.accessioned2016-12-14T09:37:26Z
dc.date.available2016-12-14T09:37:26Z
dc.date.issued2015-11-26
dc.description.abstractDrinking water production needs to increasingly consider removal of background organic matter and trace micropollutants without increasing disinfection-by-product (DBP) formation potential. The presented data demonstrates the efficacy of both UV/H2O2 and UV/TiO2 in removing the pesticide metaldehyde to below drinking water compliance levels in both real and synthetic waters. This pesticide has proven to be unaffected by conventional water treatment processes such as granular activated carbon and is responsible for many of the water company compliance failures in the UK. The potential of UV/H2O2 is further demonstrated to offer an alternative approach for the removal of recalcitrant organic matter to ensure DBP compliance as long as extended UV doses of over 10,000 mJ cm−2 are applied at the optimum peroxide dose of 8 mM. Alkalinity and UV dose have an impact on DBP formation: at low UV fluences, increased alkalinity reduced the DBP formation. The UV/TiO2 process was observed to be inhibited in the presence of alkalinity. Aggregation studies and comparison of the catalyst fractal dimension showed that the process inhibition is mainly due to aggregation. This restricts the surface area available for reactions, rather than changes in the catalyst properties or carbonate radical scavenging, which is often the reasoning attributed to photocatalysis inhibition. Hence, the presented results indicate that decreasing the catalyst aggregation is the key to apply photocatalysis as drinking water treatment.en_UK
dc.identifier.citationJefferson B, Jarvis P, Bhagianathan G, et al., (2016) Effect of elevated UV dose and alkalinity on metaldehyde removal and THM formation with UV/TiO2 and UV/H2O2. Chemical Engineering Journal, Volume 288, March 2016, pp.359-367en_UK
dc.identifier.cris5809189
dc.identifier.issn1385-8947
dc.identifier.urihttps://doi.org/10.1016/j.cej.2015.11.071
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/11151
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.subjectAggregationen_UK
dc.subjectAdvanced oxidation processesen_UK
dc.subjectDisinfection-by producten_UK
dc.subjectDrinking wateren_UK
dc.subjectMetaldehydeen_UK
dc.subjectPhotocatalysisen_UK
dc.titleEffect of elevated UV dose and alkalinity on metaldehyde removal and THM formation with UV/TiO2 and UV/H2O2en_UK
dc.typeArticleen_UK

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