Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1016/j.scitotenv.2025.179979 |
Lizenz  |
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| Titel (primär) | Leaf litter material limits the elimination of organic micropollutants in redox-differentiated lab-scale bank filtration columns |
| Autor | Köpke, J.
; Bayarsaikhan, U.; Adrian, L.
; Jekel, M.; Ruhl, A.S. |
| Quelle | Science of the Total Environment |
| Erscheinungsjahr | 2025 |
| Department | MEB |
| Band/Volume | 993 |
| Seite von | art. 179979 |
| Topic | T7 Bioeconomy |
| Supplements | https://ars.els-cdn.com/content/image/1-s2.0-S0048969725016195-mmc1.docx |
| Keywords | Bank filtration; Biotransformation; Leaf litter; Natural attenuation; Micropollutants; Particulate organic carbon; Sulfamethoxazole |
| Abstract | Organic micropollutants (OMP) in surface waters can leak into groundwater via bank filtration impacting the quality of drinking water produced from this groundwater. OMP concentrations are often greatly reduced during the passage, however, the transformation efficiency depends strongly on the physicochemical conditions within the bank. We hypothesized that leaf litter deposited from the surrounding vegetation leaks dissolved organic carbon into the bank, impacting the availability of oxygen and hence microbial OMP transformation. In laboratory columns amended with ground leaf litter most organic substances were released within 21 days. After 220 days ∼85 % of the organic carbon remained within the leaf litter with humic substances constituting the main dissolved organic carbon fraction. Even small additions of leaf litter led to oxygen depletion for up to 130 days. Oxygen depletion strongly reduced the transformation of sulfamethoxazole, diclofenac, benzotriazole, gabapentin, but not formylamino antipyrine. When more leaf litter was added more time was needed until OMP transformation was observed. Carbamazepine transformation was not observed. Our work indicates that leaf litter from lakeshore vegetation can reduce the transformation rate of OMPs within the bank. The data indicates that dissolved organic carbon is released from leaf litter into the sediment leading to oxygen depletion and thus limiting oxic microbial transformation. This process has strong implications for the functioning of bank filtration. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=30986 |
| Köpke, J., Bayarsaikhan, U., Adrian, L., Jekel, M., Ruhl, A.S. (2025): Leaf litter material limits the elimination of organic micropollutants in redox-differentiated lab-scale bank filtration columns Sci. Total Environ. 993 , art. 179979 10.1016/j.scitotenv.2025.179979 |
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