Details
| Original language | English |
|---|---|
| Pages (from-to) | 2093-2108 |
| Number of pages | 16 |
| Journal | Environmental science. Processes & impacts |
| Volume | 21 |
| Issue number | 12 |
| Early online date | 17 Oct 2019 |
| Publication status | Published - 1 Dec 2019 |
Abstract
Enhancing the understanding of the fate of wastewater-derived organic micropollutants in rivers is crucial to improve risk assessment, regulatory decision making and river management. Hyporheic exchange and sediment bacterial diversity are two factors gaining increasing importance as drivers for micropollutant degradation, but are complex to study in field experiments and usually ignored in laboratory tests aimed to estimate environmental half-lives. Flume mesocosms are useful to investigate micropollutant degradation processes, bridging the gap between the field and batch experiments. However, few studies have used flumes in this context. We present a novel experimental setup using 20 recirculating flumes and a response surface model to study the influence of hyporheic exchange and sediment bacterial diversity on half-lives of the anti-epileptic drug carbamazepine (CBZ) and the artificial sweetener acesulfame (ACS). The effect of bedform-induced hyporheic exchange was tested by three treatment levels differing in number of bedforms (0, 3 and 6). Three levels of sediment bacterial diversity were obtained by diluting sediment from the River Erpe in Berlin, Germany, with sand (1 : 10, 1 : 1000 and 1 : 100 000). Our results show that ACS half-lives were significantly influenced by sediment dilution and number of bedforms. Half-lives of CBZ were higher than ACS, and were significantly affected only by the sediment dilution variable, and thus by bacterial diversity. Our results show that (1) the flume-setup is a useful tool to study the fate of micropollutants in rivers, and that (2) higher hyporheic exchange and bacterial diversity in the sediment can increase the degradation of micropollutants in rivers.
ASJC Scopus subject areas
- Environmental Science(all)
- Environmental Chemistry
- Medicine(all)
- Public Health, Environmental and Occupational Health
- Environmental Science(all)
- Management, Monitoring, Policy and Law
Sustainable Development Goals
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In: Environmental science. Processes & impacts, Vol. 21, No. 12, 01.12.2019, p. 2093-2108.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Using recirculating flumes and a response surface model to investigate the role of hyporheic exchange and bacterial diversity on micropollutant half-lives
AU - Jaeger, Anna
AU - Coll, Claudia
AU - Posselt, Malte
AU - Mechelke, Jonas
AU - Rutere, Cyrus
AU - Betterle, Andrea
AU - Raza, Muhammad
AU - Mehrtens, Anne
AU - Meinikmann, Karin
AU - Portmann, Andrea
AU - Singh, Tanu
AU - Blaen, Phillip J.
AU - Krause, Stefan
AU - Horn, Marcus Andreas
AU - Hollender, Juliane
AU - Benskin, Jonathan P
AU - Sobek, Anna
AU - Lewandowski, Jörg
N1 - Funding Information: The work has received funding from the European Union's Horizon 2020 research and innovation programme under Marie Sklodowska-Curie grant agreement No. 641939 and additionally from the Research Training Group ‘Urban Water Interfaces (UWI)’ (GRK 2032/1) funded by the German Research Foundation (DFG). We thank Ignacio Peralta-Maraver, Sheelajini Para-mjothy, Jason Galloway, Grit Siegert, Torsten Preuer and Christine Sturm for their support in the experimental work.
PY - 2019/12/1
Y1 - 2019/12/1
N2 - Enhancing the understanding of the fate of wastewater-derived organic micropollutants in rivers is crucial to improve risk assessment, regulatory decision making and river management. Hyporheic exchange and sediment bacterial diversity are two factors gaining increasing importance as drivers for micropollutant degradation, but are complex to study in field experiments and usually ignored in laboratory tests aimed to estimate environmental half-lives. Flume mesocosms are useful to investigate micropollutant degradation processes, bridging the gap between the field and batch experiments. However, few studies have used flumes in this context. We present a novel experimental setup using 20 recirculating flumes and a response surface model to study the influence of hyporheic exchange and sediment bacterial diversity on half-lives of the anti-epileptic drug carbamazepine (CBZ) and the artificial sweetener acesulfame (ACS). The effect of bedform-induced hyporheic exchange was tested by three treatment levels differing in number of bedforms (0, 3 and 6). Three levels of sediment bacterial diversity were obtained by diluting sediment from the River Erpe in Berlin, Germany, with sand (1 : 10, 1 : 1000 and 1 : 100 000). Our results show that ACS half-lives were significantly influenced by sediment dilution and number of bedforms. Half-lives of CBZ were higher than ACS, and were significantly affected only by the sediment dilution variable, and thus by bacterial diversity. Our results show that (1) the flume-setup is a useful tool to study the fate of micropollutants in rivers, and that (2) higher hyporheic exchange and bacterial diversity in the sediment can increase the degradation of micropollutants in rivers.
AB - Enhancing the understanding of the fate of wastewater-derived organic micropollutants in rivers is crucial to improve risk assessment, regulatory decision making and river management. Hyporheic exchange and sediment bacterial diversity are two factors gaining increasing importance as drivers for micropollutant degradation, but are complex to study in field experiments and usually ignored in laboratory tests aimed to estimate environmental half-lives. Flume mesocosms are useful to investigate micropollutant degradation processes, bridging the gap between the field and batch experiments. However, few studies have used flumes in this context. We present a novel experimental setup using 20 recirculating flumes and a response surface model to study the influence of hyporheic exchange and sediment bacterial diversity on half-lives of the anti-epileptic drug carbamazepine (CBZ) and the artificial sweetener acesulfame (ACS). The effect of bedform-induced hyporheic exchange was tested by three treatment levels differing in number of bedforms (0, 3 and 6). Three levels of sediment bacterial diversity were obtained by diluting sediment from the River Erpe in Berlin, Germany, with sand (1 : 10, 1 : 1000 and 1 : 100 000). Our results show that ACS half-lives were significantly influenced by sediment dilution and number of bedforms. Half-lives of CBZ were higher than ACS, and were significantly affected only by the sediment dilution variable, and thus by bacterial diversity. Our results show that (1) the flume-setup is a useful tool to study the fate of micropollutants in rivers, and that (2) higher hyporheic exchange and bacterial diversity in the sediment can increase the degradation of micropollutants in rivers.
UR - http://www.scopus.com/inward/record.url?scp=85075557755&partnerID=8YFLogxK
U2 - 10.1039/c9em00327d
DO - 10.1039/c9em00327d
M3 - Article
C2 - 31631204
VL - 21
SP - 2093
EP - 2108
JO - Environmental science. Processes & impacts
JF - Environmental science. Processes & impacts
SN - 2050-7895
IS - 12
ER -