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)
| Autor: | Jan Knappe, Laurence Gill, Donata Dubber |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
on-site wastewater
media_common.quotation_subject Geography Planning and Development 0207 environmental engineering Septic tank 02 engineering and technology 010501 environmental sciences Aquatic Science 01 natural sciences Biochemistry septic tank Fluorescence spectroscopy fluorescent whitening compounds Dissolved organic carbon organics Organic matter 020701 environmental engineering Effluent TD201-500 0105 earth and related environmental sciences Water Science and Technology media_common chemistry.chemical_classification Water supply for domestic and industrial purposes Hydraulic engineering biomat 6. Clean water Humus percolation area chemistry Wastewater Environmental chemistry Sewage treatment fluorescence TC1-978 |
| Zdroj: | Water, Vol 13, Iss 2627, p 2627 (2021) Water Volume 13 Issue 19 |
| ISSN: | 2073-4441 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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