Long-term behavior of groundwater chemistry in a periodically rewetted fen area covered with macrophytes

Maassen, Sebastian; Balla, Dagmar; Dannowski, Ralf

doi:10.1016/j.jenvman.2014.12.021

Cited by 5 publications

(7 citation statements)

References 35 publications

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“…Based on previous investigations, approximately 50% can be assumed amorphous oxalate-soluble iron [18], which corresponded well with the high dissolved iron concentration Fe 2+ in the groundwater of approximately 10 mg L −1 . Similarly high concentrations in the groundwater, between 10 and 20 mg L −1 , were found for dissolved organic carbon DOC [5]. The NO 3 -N concentration ranged between 0.3 and 1.0 mg L -1 , the mean of NH 4 -N was 0.38 mg L −1 .…”

Section: Hydrological and Geohydraulic Conditions And Physio-chemicamentioning

confidence: 54%

“…The peat soils are highly decomposed and degraded. In 1997, we started a pilot project for peatland restoration on an 8-hectare site-the Biesenbrow pilot site [5]. Used for intensive corn production until 1977, then as grassland up to 1997, the area has been covered with reed (Phragmites australis) ever since.…”

Section: Study Site Descriptionmentioning

confidence: 99%

“…Groundwater chemistry analyses were performed during the vegetation periods in 2011, 2012 and 2013 at 20 sampling dates in total. The results of groundwater chemistry have been published in Maassen et al [5].…”

Section: Monitoring Programmentioning

confidence: 99%

“…To rehabilitate the natural functions of peatlands, the restoration of waterlogged, anaerobic conditions is essential. Simply blocking drainage outlets is not sufficient, but surplus water is required to keep a high groundwater table especially in regions with a negative water budget [5]. This surplus water could be supplied in the form of treated wastewater.…”

Section: Introductionmentioning

confidence: 99%

“…The additional water input by flooding was necessary for rewetting to compensate for the high evapotranspiration losses. Results of the hydrological, geochemical and ecotoxicological monitoring were combined with those of the geohydraulic modeling of the groundwater flow pathways and of the retention time [5]. The aim was to investigate the behavior of wastewater-borne micropollutants within the aerobic/anaerobic passage along the streamlines to the adjacent surface water, as shown in Figure 1, and assess potential ecotoxicological long-term impacts on soil organisms.…”

Section: Introductionmentioning

confidence: 99%

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Dissipation of Micropollutants in a Rewetted Fen Peatland: A Field Study Using Treated Wastewater

Maassen

Richter

Coors

et al. 2017

Water

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Abstract:In the present study, a mixture of treated wastewater and surface water was used to rewet a degraded fen peatland site during a three-year rewetting experiment. We studied the behavior and effects of micropollutants by means of hydrological, physico-chemical, microbiological and ecotoxicological monitoring. The highest concentrations of micropollutants in the treated wastewater were found for the pharmaceuticals carbamazepine and diclofenac, some metabolites, the sweetener acesulfame, tolyl-and benzotriazole and diatrizoate. In the underlying, shallow groundwater where treated wastewater application for rewetting had been expected to have the greatest impact due to seeping and evapotranspiration processes, only a sporadic occurrence of micropollutants was found. The influence of dilution by groundwater movements was examined by applying a geohydrological model. The sorption of micropollutants onto the peaty soil also played a role, as found for carbamazepine. Further processes such as photolysis, microbial decay under low redox conditions and plant uptake can be assumed to be relevant for the removal of many substances. Ecotoxicity tests with the soil before and after rewetting did not indicate any negative impact on the soil habitat quality by wastewater application, but clearly pointed at ecotoxicologically relevant geogenic arsenic concentrations at the study site. Although a positive effect on receiving surface water systems is expected if wastewater is applied on land instead of discharged to water bodies, the rewetted soil may turn into a sink for micropollutants in the long term. Hence, the findings of the present field study encourage further investigations in order to identify the governing processes in the elimination of micropollutants in rewetted peatlands flooded with treated wastewater.

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Section: Hydrological and Geohydraulic Conditions And Physio-chemicamentioning

confidence: 54%

Section: Study Site Descriptionmentioning

confidence: 99%

Section: Monitoring Programmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dissipation of Micropollutants in a Rewetted Fen Peatland: A Field Study Using Treated Wastewater

Maassen

Richter

Coors

et al. 2017

Water

Self Cite

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Changes in Genotype Composition and Morphology at an Experimental Site of Common Reed (Phragmites australis) Over a Quarter of a Century

Kuprina,

Seeber,

Rudyk

et al. 2023

Wetlands

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The cultivation of common reed (Phragmites australis) is one of the most promising practices of paludiculture on fen peatlands. This highly productive grass has a high adaptation capacity via high levels of genetic diversity and phenotypic plasticity. In this study, a reed experimental site established on a degraded fen in 1996/97 with a mixture of monoclonally (meristematically propagated plantlets) and polyclonally (pre-grown seedlings) planted plots was investigated by microsatellite genotyping. All nine genotypes of the monoclonal planted plots were recovered and could be genetically characterized; invasion by other genotypes was negligible. Similarly, the polyclonal plots sustained high clonal diversity with no prevalence of a single genotype. The growth characteristics of the five quantitatively investigated genotypes significantly differed from each other (α = 0.05): dry biomass per stem 5–18 g, panicles per m2 20–60, average stem diameter 3.5–6 mm, height 170–250 cm. Similarly, the persistence of genotypes at the planted plots and their invasiveness (ability to invade neighboured plots) varied. These results show that common reed stands are extremely persistent even if established with genotypes that are likely not to be locally adapted. Their genetic structure remained stable for at least 24 years regardless of the planting density (1, 4, and 10 plants per m2). Our results indicate that farmers may be able to maintain favourable genotypes for many years, thus the selection and breeding of common reed as a versatile crop for rewetted peatlands is a promising objective for paludiculture research.

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Carbon farming for climate change mitigation and ecosystem services – Potentials and influencing factors

Strauss,

Paul,

Dönmez

et al. 2024

Journal of Environmental Management

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Long-term behavior of groundwater chemistry in a periodically rewetted fen area covered with macrophytes

Cited by 5 publications

References 35 publications

Dissipation of Micropollutants in a Rewetted Fen Peatland: A Field Study Using Treated Wastewater

Dissipation of Micropollutants in a Rewetted Fen Peatland: A Field Study Using Treated Wastewater

Changes in Genotype Composition and Morphology at an Experimental Site of Common Reed (Phragmites australis) Over a Quarter of a Century

Carbon farming for climate change mitigation and ecosystem services – Potentials and influencing factors

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