Discerning Natural and Anthropogenic Factors Driving the Variation of Estuarine CH4 and N2O DOI Creative Commons
Zhengping Chen, Liuqian Yu, Qichun Yang

et al.

Ocean-Land-Atmosphere Research, Journal Year: 2024, Volume and Issue: 4

Published: Dec. 27, 2024

Estuaries are commonly recognized as a major source of greenhouse gases due to the massive anthropogenic input organic matter and nutrients, which is associated with highly active microbial assemblages. However, combined effects natural factors their relative contributions estuarine gas emissions not well understood, particularly at confluence fresh water seawater. In this study, biweekly sampling was conducted from November 2021 January 2024 main outlet Pearl River in south China, characterized by subtropical climate, eutrophic environment, heavy activity. Measurements were obtained dissolved methane (CH 4 ), nitrous oxide (N 2 O), seasonally varying physical chemical parameters high temporal resolution. Analysis measurement data revealed that CH N O concentrations decreased increases river discharge, enhanced dilution effect, reductions activities, such enforcement measures prevent COVID-19. The different dynamic processes nitrogen carbon cycles may have contributed differences variations (e.g., varied within narrower range than ). By presenting analyzing 2-year time series resolution under complex forcing, study underscores importance human influence on inventories emissions.

Language: Английский

Making waves: Rethinking our mission for N2O emissions at WRRFs DOI

Leon Downing,

McKenna Farmer, Bishav Bhattarai

et al.

Water Research X, Journal Year: 2025, Volume and Issue: 28, P. 100320 - 100320

Published: Feb. 18, 2025

Language: Английский

Citations

0
Fugitive gases reduction and carbon sequestration potential of ecological floating beds DOI

Gaojun Yan,

C. F. Qiao,

Ziyan Liu

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 383, P. 125341 - 125341

Published: April 21, 2025

Language: Английский

Citations

0
Wastewater Treatment for Energy Conservation and Zero Carbon Footprint: A Review DOI Creative Commons
Ravikumar Jayabal, S. Rajkumar

Energy Science & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: May 19, 2025

ABSTRACT This article explores innovative wastewater treatment (WWT) methods that promote energy conservation and a zero‐carbon footprint. It emphasizes the transition to sustainable WWT practices by focusing on resource recovery, efficiency, reducing greenhouse gas emissions. The study employs comprehensive literature review assess various technologies based their effectiveness in pollutant removal while conserving energy. includes only have been successfully implemented or show strong potential for practical use. research integrates industry reports, case studies, peer‐reviewed articles evaluate accessible policy frameworks supporting adoption. Innovative solutions are identified address challenges of traditional methods, such as high consumption inadequate removal. also highlights importance nutrient prevent eutrophication. In conclusion, advocates adopting cutting‐edge enhance efficiency contribute carbon neutrality. underscores necessity ongoing innovation management environmental challenges. By transforming into more efficient process, these advancements benefit both environment public health, reinforcing integrating advanced supportive policies achieving water treatment.

Language: Английский

Citations

0
Nitrous oxide (N2O) in Macquarie Harbour, Tasmania DOI Creative Commons
Johnathan Daniel Maxey, Neil D. Hartstein, Hermann W. Bange

et al.

Biogeosciences, Journal Year: 2024, Volume and Issue: 21(24), P. 5613 - 5637

Published: Dec. 16, 2024

Abstract. Fjord-like estuaries are hotspots of biogeochemical cycling due to their steep physicochemical gradients. The spatiotemporal distribution nitrous oxide (N2O) within many these systems is poorly described, especially in the Southern Hemisphere. goals this study describe N2O a Hemisphere fjord-like estuary, main environmental drivers distribution, air–sea flux N2O, and production. Sampling surveys were undertaken Macquarie Harbour, Tasmania, capture concentrations water column profiles winter (July 2022), spring (October summer (February 2023), autumn (April 2023). samples collected from middle depths ocean (5 m), minor river (1 m) endmembers, major (10 endmember at 2 m bottom, five through four stations harbour body. Results indicate that was consistently supersaturated (reaching 170 % saturation) below system's freshwater lens where oxygen often hypoxic but infrequently anoxic. In surface lens, levels saturation vary with estimated flow proximity endmember. linear relationship between apparent utilisation ΔN2O indicates nitrification process generating system. When high October undersaturated (as low as 70 %) throughout most harbour. April 2023) observed be stations. Calculated fluxes indicated system generally source atmosphere under weak conditions sink during strong conditions. diapycnal contributor concentrations, sub-halocline intercepted by riverine transported out changing climate, western Tasmania expected receive higher rainfall lower rainfall, which may augment dynamics enhancing efflux atmosphere. This first report observations generation processes,

Language: Английский

Citations

1
Nutrient management offsets the effect of deoxygenation and warming on nitrous oxide emissions in a large US estuary DOI Creative Commons
Weiyi Tang, Fei Da, John C. Tracey

et al.

Science Advances, Journal Year: 2024, Volume and Issue: 10(51)

Published: Dec. 20, 2024

Many estuaries experience eutrophication, deoxygenation and warming, with potential impacts on greenhouse gas emissions. However, the response of N 2 O production to these changes is poorly constrained. Here we applied nitrogen isotope tracer incubations measure under experimentally manipulated in oxygen temperature Chesapeake Bay—the largest estuary United States. more than doubled from nitrification increased exponentially denitrification when was decreased >20 <5 micromolar. Raising 15° 35°C 2- 10-fold. Developing a biogeochemical model by incorporating responses, emissions Bay were estimated decrease 157 140 Mg year −1 1986 2016 further 124 2050. Although warming stimulate production, modeled emissions, attributed nutrient inputs, indicates importance management curbing potentially mitigating climate change.

Language: Английский

Citations

0
Discerning Natural and Anthropogenic Factors Driving the Variation of Estuarine CH4 and N2O DOI Creative Commons
Zhengping Chen, Liuqian Yu, Qichun Yang

et al.

Ocean-Land-Atmosphere Research, Journal Year: 2024, Volume and Issue: 4

Published: Dec. 27, 2024

Estuaries are commonly recognized as a major source of greenhouse gases due to the massive anthropogenic input organic matter and nutrients, which is associated with highly active microbial assemblages. However, combined effects natural factors their relative contributions estuarine gas emissions not well understood, particularly at confluence fresh water seawater. In this study, biweekly sampling was conducted from November 2021 January 2024 main outlet Pearl River in south China, characterized by subtropical climate, eutrophic environment, heavy activity. Measurements were obtained dissolved methane (CH 4 ), nitrous oxide (N 2 O), seasonally varying physical chemical parameters high temporal resolution. Analysis measurement data revealed that CH N O concentrations decreased increases river discharge, enhanced dilution effect, reductions activities, such enforcement measures prevent COVID-19. The different dynamic processes nitrogen carbon cycles may have contributed differences variations (e.g., varied within narrower range than ). By presenting analyzing 2-year time series resolution under complex forcing, study underscores importance human influence on inventories emissions.

Language: Английский

Citations

0