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Characterisation of organic matter and its transformation processes in on-site wastewater effluent percolating through soil using fluorescence spectroscopic methods and parallel factor analysis (PARAFAC)

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dc.contributor.author Dubber, Donata
dc.contributor.author Knappe, Jan
dc.contributor.author Gill, Laurence W.
dc.date.accessioned 2021-10-07T08:32:38Z
dc.date.available 2021-10-07T08:32:38Z
dc.date.issued 2021
dc.identifier.uri http://hdl.handle.net/10344/10652
dc.description peer-reviewed en_US
dc.description.abstract This research has used fluorescence spectroscopy and parallel factor analysis (PARAFAC) in order to characterize dissolved organic matter in septic tank effluent, as it passes through the biomat/biozone, infiltrating into the unsaturated zone beneath domestic wastewater treatment systems (DWWTSs). Septic tank effluent and soil moisture samples from the percolation areas of two DWWTSs have been analyzed using fluorescence excitation–emission spectroscopy. Using PARAFAC analysis, a six-component model was obtained whereby individual model components could be assigned to humified organic matter, fluorescent whitening compounds (FWCs), and protein-like compounds. This has shown that fluorescent dissolved organic matter (FDOM) in domestic wastewater was dominated by protein-like compounds and FWCs and that, with treatment in the percolation area, protein-like compounds and FWCs are removed and contributions from terrestrially derived (soil) organic decomposition compounds increase, leading to a higher degree of humification and aromaticity. The results also suggest that the biomat is the most important element determining FDOM removal and consequently affecting DOM composition. Furthermore, no significant difference was found in the FDOM composition of samples from the percolation area irrespective of whether they received primary or secondary effluent. Overall, the tested fluorometric methods were shown to provide information about structural and functional properties of organic matter which can be useful for further studies concerning bacterial and/or virus transport from DWWTSs. en_US
dc.language.iso eng en_US
dc.publisher MDPI en_US
dc.relation.ispartofseries Water;13, 2627
dc.subject on-site wastewater en_US
dc.subject organics en_US
dc.subject fluorescence en_US
dc.title Characterisation of organic matter and its transformation processes in on-site wastewater effluent percolating through soil using fluorescence spectroscopic methods and parallel factor analysis (PARAFAC) en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.3390/w13192627
dc.contributor.sponsor SFI en_US
dc.relation.projectid 15/ERC/B3128 en_US
dc.relation.projectid 13/IA/1923 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US


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