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Publikationstyp
Wissenschaftlicher Artikel
Erscheinungsjahr
2018
Fate of leaf litter deposits and impacts on oxygen availability in bank filtration column studies
Fate of leaf litter deposits and impacts on oxygen availability in bank filtration column studies
Autor:innen
Herausgeber
Quelle
Environmental Research
164 (2018)
164 (2018)
Schlagwörter
Uferfiltration, Sauerstoffverbrauch, NOM [natürlicher organischer Stoff]
Zitation
BAYARSAIKHAN, Uranchimeg, Josefine FILTER, Ulrich GERNERT und Aki Sebastian RUHL, 2018. Fate of leaf litter deposits and impacts on oxygen availability in bank filtration column studies. Environmental Research [online]. 2018. Bd. 164 (2018). DOI 10.60810/openumwelt-1564. Verfügbar unter: https://openumwelt.de/handle/123456789/5639
Zusammenfassung englisch
Degradation of particulate organic carbon (POC) such as leaf litter might deplete dissolved oxygen within the upper layers of bank filtration, an efficient and robust barrier for pathogens and for various organic micro-pollutants (OMP) in water supply systems worldwide. The degradation of OMP during bank filtration depends on the redox conditions. The present study aimed at identifying the impacts and fates of different local leaves on the oxygen consumption and the possible biological degradation of indicator OMP. Oxygen concentrations initially decreased within the columns from around 8 mg/L in the influent to low concentrations indicating extensive consumption within a short travel distance. Still a substantial oxygen consumption was observed after 250 days. OMP concentrations were not significantly affected by the microbial processes. A layer of calcium carbonate crystallites was observed on the POC layer. Some leaf fragments appeared to be persistant towards degradation and the carbon content relative to nitrogen and sulfur contents decreased within 250 days. The results demonstrate that trees at bank filtration sites might have a strong long-term impact on the subsurface redox conditions. © 2018 Elsevier Inc. All rights reserved.