High denitrification potential but low nitrous oxide emission in a constructed wetland treating nitrate-polluted agricultural run-off

Mander, Ülo; Tournebize, Julien; Espenberg, Mikk; Chaumont, Cédric; Torga, Raili; Garnier, Josette; Muhel, Mart; Maddison, Martin; Lebrun, Jérémie D.; Uher, E.; Remm, Kalle; Pärn, Jaan; Soosaar, Kaido

doi:10.1016/j.scitotenv.2021.146614

Cited by 23 publications

(9 citation statements)

References 81 publications

(85 reference statements)

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“…The top 20 active institutions for articles related to agricultural drainage water treatment are listed in Table 2. The U.S. has a more significant number of research institutions on agricultural drainage water, such as the USDA Agricultural Research Service, the National Laboratory for Agriculture and the Environment (USDA ARS, 29 papers), the University of California, Berkeley (14), the National Research Center (USA) (14), the U.S. Agricultural Research Service (12), Iowa State University (12), and the University of California, Riverside (11), etc.…”

Section: Cooperation Networkmentioning

confidence: 99%

“…In response to this situation, scholars from around the world have proposed a series of physical, chemical, and biological techniques to treat agricultural drainage water [6,7]. For instance, fertilizer management, cover crops, perennial crops, groundwater management, constructed wetlands, buffer strips, drainage ditches, saturated buffer zones, and bioreactors [8][9][10][11][12][13][14]. Among them, agricultural drainage water ditches and bioreactors have received widespread attention from scholars worldwide due to their unique advantages.…”

Section: Introductionmentioning

confidence: 99%

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Visualization Network Analysis of Studies on Agricultural Drainage Water Treatment

Wang,

Zhang,

Deng

et al. 2023

Processes

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Excessive chemical substances in agricultural drainage water have serious adverse effects on the ecological environment of the watershed into which they are discharged. Therefore, it has attracted widespread attention from scholars worldwide. In this paper, 282 scientific articles related to agricultural drainage water treatment are selected from the Web of Science Core Collection database, and CiteSpace was used to visualize and analyze the knowledge map of this field. The most productive authors, institutions, and countries in agricultural drainage water research are graphically presented in this paper. Developing countries are becoming the core force in this realm of inquiry. In addition, this paper explains the changes in research topics in this field over time and reveals current research hotspots, including “desalination”, “denitrification”, and “phosphorus removal”. Future research endeavors in using bioreactors and agricultural drainage water ditches for treating agricultural drainage water are implied to become a research focus in this field. This paper also emphasizes that future environmental protection research should increase case studies in developing countries and develop corresponding solutions based on the actual situation of agriculture in rural areas of developing countries.

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Section: Cooperation Networkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Visualization Network Analysis of Studies on Agricultural Drainage Water Treatment

Wang,

Zhang,

Deng

et al. 2023

Processes

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“…For example, Groh et al have found that most of the N 2 O loss occurred from the terrestrial portions of the wetlands, whereas little N 2 O was emitted from inundated areas since it is probable that they weer under anaerobic conditions [71]. On the other hand, some studies have shown that most of the N 2 O produced is further reduced to N 2 [72], whereas for a CW located in France it was calculated that the N 2 O emitted into the atmosphere was only 9% of the potential emission in sediments [73].…”

Section: Substrate Materialsmentioning

confidence: 99%

Diffuse Water Pollution from Agriculture: A Review of Nature-Based Solutions for Nitrogen Removal and Recovery

Mancuso

Bencresciuto

Lavrnić

et al. 2021

Water

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The implementation of nature-based solutions (NBSs) can be a suitable and sustainable approach to coping with environmental issues related to diffuse water pollution from agriculture. NBSs exploit natural mitigation processes that can promote the removal of different contaminants from agricultural wastewater, and they can also enable the recovery of otherwise lost resources (i.e., nutrients). Among these, nitrogen impacts different ecosystems, resulting in serious environmental and human health issues. Recent research activities have investigated the capability of NBS to remove nitrogen from polluted water. However, the regulating mechanisms for nitrogen removal can be complex, since a wide range of decontamination pathways, such as plant uptake, microbial degradation, substrate adsorption and filtration, precipitation, sedimentation, and volatilization, can be involved. Investigating these processes is beneficial for the enhancement of the performance of NBSs. The present study provides a comprehensive review of factors that can influence nitrogen removal in different types of NBSs, and the possible strategies for nitrogen recovery that have been reported in the literature.

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“…as substrates, and the latter being able to oxidize CH 4 in aerobic or anoxic environments [18]. N 2 O emissions in CWs are intimately related to the composition and abundance of nitrifying bacteria and DNB [19]. Incomplete nitrification and denitrification processes can both produce N 2 O, a potent greenhouse gas.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Greenhouse Gas Emissions from Constructed Wetlands Vegetated with Myriophyllum aquatic: The Effects of Influent C/N Ratio and Microbial Responses

Wang,

Li,

et al. 2024

Water

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This study designed surface flow constructed wetlands (SFCWs) with Myriophyllum aquaticum (M. aquaticum) to evaluate how different influent C/N ratios (0:1 (C0N), 5:1 (C5N), 10:1 (C10N), and 15:1 (C15N)) affect pollutant removal, greenhouse gas (GHG) emissions, and microbial communities. The results showed that effluent ammonia nitrogen (NH4+-N), nitrate nitrogen (NO3−-N), and total nitrogen (TN) concentrations decreased, but effluent chemical oxygen demand (COD) concentration increased with increasing influent C/N ratios. The highest removal rates of TN (73.17%) and COD (74.56%) were observed with C5N. Regarding GHG emissions, a few changes in CO2 fluxes were caused by the influent C/N ratio, whereas CH4 fluxes obviously increased with the increasing influent C/N ratio. The highest N2O emission occurred with C0N (211.03 ± 44.38 mg-N·m−2·h−1), decreasing significantly with higher C/N ratios. High-throughput sequencing revealed that different influent C/N ratios directly influenced the microbial distribution and composition related to CH4 and N2O metabolism in SFCWs. The highest abundance (46.24%) of denitrifying bacteria (DNB) was observed with C5N, which helped to achieve efficient nitrogen removal with a simultaneous reduction in N2O emissions. Methanogen abundance rose with higher C/N ratios, whereas methanotrophs peaked under C5N and C10N conditions. Additionally, the random forest model identified influent C/N ratio and Rhodopseudomonas as primary factors influencing CH4 and N2O emissions, respectively. This highlights the importance of the influent C/N ratio in regulating both pollutant removal and GHG emissions in constructed wetlands.

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High denitrification potential but low nitrous oxide emission in a constructed wetland treating nitrate-polluted agricultural run-off

Cited by 23 publications

References 81 publications

Visualization Network Analysis of Studies on Agricultural Drainage Water Treatment

Visualization Network Analysis of Studies on Agricultural Drainage Water Treatment

Diffuse Water Pollution from Agriculture: A Review of Nature-Based Solutions for Nitrogen Removal and Recovery

Characteristics of Greenhouse Gas Emissions from Constructed Wetlands Vegetated with Myriophyllum aquatic: The Effects of Influent C/N Ratio and Microbial Responses

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