Dissolved organic matter (DOM) concentration and quality in a coastal aquifer

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dc.contributor.authorZainuddin, NSen_AU
dc.contributor.authorAndersen, MSen_AU
dc.contributor.authorBaker, AAen_AU
dc.contributor.authorHowley, EMen_AU
dc.contributor.authorO'Carroll, DMen_AU
dc.contributor.authorJex, CNen_AU
dc.contributor.authorMeredith, KTen_AU
dc.contributor.authorWells, Een_AU
dc.date.accessioned2022-07-22T03:56:11Zen_AU
dc.date.available2022-07-22T03:56:11Zen_AU
dc.date.issued2015-04-14en_AU
dc.date.statistics2022-06-29en_AU
dc.description© Author(s) 2015. CC Attribution 3.0 Licenseen_AU
dc.description.abstractThis study investigates the range of fluorescence properties of natural occurring DOM in a coastal aquifer at Anna Bay, NSW, Australia. The determination of the extent to which DOM varies in coastal groundwater has been distinguished through fluorescence spectroscopy by excitation-emission matrices (EEM), and the application of parallel factor analysis (PARAFAC). In addition, DOM was characterised by a combination of DOC-LABOR Liquid Chromatography - Trace Organic Carbon Detector (LC-OCD) method and PHREEQC modelling. In general, results show an anoxic aquifer featuring calcite dissolution in the upper regions of the aquifer and organic matter degradation with redox zonation dominated by iron and sulphate reduction as well as methanogenesis. Several fluorescence EEM patterns were identified. DOM in coastal environment was variable, but mainly composed of low molecular weight compounds. On overall system two humic-like substances (C1, C2) and one fulvic-like substance (C3) were identified by the PARAFAC model. C1 and C2 exhibited same trends and were very similar. Measurement of the fluorescence excitation-emission matrices (EEM) and subsequent PARAFAC reveal different fluorescent DOM fractions and hence variable contributions by DOM to the reduction process in the coastal aquifer zones. © 2015 The Author(s).en_AU
dc.identifier.articlenumberEGU2015-15691en_AU
dc.identifier.citationZainuddin, N. S., Andersen, M. S., Baker, A., Howley, E. M., O'Carroll, D., Jex, C. N., Meredith, K., & Wells, E. (2015). Dissolved organic matter (DOM) concentration and quality in a coastal aquifer. Paper presented at the European Geosciences Union General Assembly 2015, Vienna, Austria, 12–17 April 2015. In EGU General Assembly Conference Abstracts (15691). Retrieved from: https://meetingorganizer.copernicus.org/EGU2015/EGU2015-15691.pdfen_AU
dc.identifier.conferenceenddate17 April 2015en_AU
dc.identifier.conferencenameEuropean Geosciences Union General Assembly 2015en_AU
dc.identifier.conferenceplaceVienna, Austriaen_AU
dc.identifier.conferencestartdate12 April 2015en_AU
dc.identifier.otherEGU 2015-15691en_AU
dc.identifier.urihttps://meetingorganizer.copernicus.org/EGU2015/EGU2015-15691.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13421en_AU
dc.identifier.volume17en_AU
dc.language.isoenen_AU
dc.publisherCopernicus Publicationsen_AU
dc.subjectOrganic matteren_AU
dc.subjectAquifersen_AU
dc.subjectCoastal regionsen_AU
dc.subjectGround wateren_AU
dc.subjectCalciteen_AU
dc.subjectChromatographyen_AU
dc.subjectNew South Walesen_AU
dc.subjectAustraliaen_AU
dc.titleDissolved organic matter (DOM) concentration and quality in a coastal aquiferen_AU
dc.typeConference Abstracten_AU
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