Seasonal Denitrification Potential in Wetland Sediments with Organic Matter from Different Plant Species

Bastviken, Sofia Kallner; Eriksson, Peder; Ekström, Alexander; Tonderski, Karin

doi:10.1007/s11270-007-9352-x

Cited by 29 publications

(18 citation statements)

References 32 publications

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“…1), the well-grown plants during the summer and autumn might also be essential to the efficient nitrogen removal, which might be attributed to their direct assimilation and excretion of endogenous carbon source that could fuel the denitrification (Bastviken et al, 2007). Our result was consistent with Lin et al (2002), which stated that efficient nitrate removal could be achieved without external carbon addition as long as plants were presented in CWs.…”

Section: Nitrogen Removal Performancesupporting

confidence: 83%

“…Conversely, k values in the spring and winter were nearly below the lines. It was reported that enhanced microbial activity was observed in the actively growing season of plant (Edwards et al, 2006) and relatively abundant organic materials were presented at the end of the growing season (Bastviken et al, 2007). Consequently, the better nitrogen removal during the autumn could be attributed to the suitable temperature and well-developed denitrifying bacteria population with high activities along with the luxuriant plants.…”

Section: Crucial Influencing Factors For Nitrogen Removalmentioning

confidence: 99%

“…1E) might also demonstrate that denitrification was severely restrained. This significant seasonal variation of nitrogen removal could be primarily attributed to the annual growing cycle of the plants and the sensitiveness of denitrification to environmental conditions (Spieles and Mitsch, 2000;Bastviken et al, 2007Bastviken et al, , 2009Hernandez and Mitsch, 2007;Beutel et al, 2009). …”

Section: Nitrogen Removal Performancementioning

confidence: 99%

See 2 more Smart Citations

Nitrogen removal from nitrate-laden wastewater by integrated vertical-flow constructed wetland systems

Chang

Dai

et al. 2013

Ecological Engineering

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Section: Nitrogen Removal Performancesupporting

confidence: 83%

Section: Crucial Influencing Factors For Nitrogen Removalmentioning

confidence: 99%

Section: Nitrogen Removal Performancementioning

confidence: 99%

See 1 more Smart Citation

Nitrogen removal from nitrate-laden wastewater by integrated vertical-flow constructed wetland systems

Chang

Dai

et al. 2013

Ecological Engineering

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“…Voltammetry is a tool commonly used to determine reduction and oxidation (redox) properties of substances (Bard and Faulkner 1980). When a reducing substance is oxidized on a solid polarized electrode, it can be described as following:…”

Section: Theory Of Voltammetrymentioning

confidence: 99%

“…Anaerobic microbes commonly prefer substrates similar to aerobic microbes with a low ratio of carbon to nitrogen (Carpenter and Adams 1979;Carpenter 1980;Gilbert 1998;Holmboe et al 2001;Hume et al 2002;de Haas et al 2002;Bastviken et al 2007;Esslemont et al 2007). Some of carbohydrates, hydrocarbons, organic sulfurs and unsaturated ester etc.…”

Section: Introductionmentioning

confidence: 99%

Reducing organic substances from anaerobic decomposition of hydrophytes

Wen

Wang

et al. 2009

Biogeochemistry

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Oxidation-reduction properties of surface sediments are tightly associated with the geochemistry of substances, and reducing organic substances (ROS) from hydrophytes residues may play an important role in these processes. In this study, composition, dynamics, and properties of ROS from anaerobic decomposition of Eichhornia crassipes (Mart.) Solms, Potamogenton crispus Linn, Vallisneria natans (Lour.) Hara, Lemna trisulca Linn and Microcystis flos-aquae (Wittr) Kirch were investigated using differential pulse voltammetry (DPV). The type of hydrophytes determined both the reducibility and composition of ROS. At the peak time of ROS production, the anaerobic decomposition of M. flos-aquae produced 6 types of ROS, among which 3 belonged to strongly reducing organic substance (SROS), whereas there were only 3-4 types of ROS from the other hydrophytes, 2 of them exhibiting strong reducibility. The order of potential of hydrophytes to produce ROS was estimated to be:natans, based on the summation of SROS and weakly reducing organic substances (WROS). The dynamic pattern of SROS production was greatly different from WROS. The total SROS appeared periodic fluctuation with reducibility gradually weakening with incubation time, whereas the total WROS increased with incubation time. Reducibility of ROS from hydrophytes was readily affected by acid, base and ligands, suggesting that their properties were related to these aspects. In addition to the reducibility, we believe that more attention should be paid to the other behaviors of ROS in surface sediments.

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Influence of Vegetation Characteristics on Soil Denitrification in Shoreline Wetlands of the Danjiangkou Reservoir in China

Liu

Zhang

2011

CLEAN Soil Air Water

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Soil denitrification in reservoir shoreline wetlands is an important process for removing excess inorganic nitrogen from upland runoff and controlling eutrophication in aquatic ecosystems. As yet, little is known about the influence of vegetation characteristics on the soil denitrification potential in reservoir shoreline wetlands, although vegetation can affect both denitrifying bacteria and soil properties. In this study, we measured the spatial variability of denitrification enzyme activity (DEA) using acetylene block method in shoreline wetlands of the Danjiangkou Reservoir, a water source of the South-to-North Water Transfer Project in China. Results indicated that DEA ranged from 0.001 to 2.449 mg N (N 2 O) g À1 h À1 , with a mean of 0.384DEA varied significantly among five representative plant communities and the highest DEA (0.248-2.449 mg N (N 2 O) g À1 h À1 ) was observed in the Polygonum hydropiper community. Plant biomass and vegetation cover were significantly and positively related to DEA and together explained 44.2% of the total variance. These results suggest that vegetation characteristics should also be considered in assessing soil denitrification capacity and restoring shoreline wetlands for nitrogen pollution removal in the Danjiangkou Reservoir after dam heightening.

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Seasonal Denitrification Potential in Wetland Sediments with Organic Matter from Different Plant Species

Cited by 29 publications

References 32 publications

Nitrogen removal from nitrate-laden wastewater by integrated vertical-flow constructed wetland systems

Nitrogen removal from nitrate-laden wastewater by integrated vertical-flow constructed wetland systems

Reducing organic substances from anaerobic decomposition of hydrophytes

Influence of Vegetation Characteristics on Soil Denitrification in Shoreline Wetlands of the Danjiangkou Reservoir in China

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