Urban landscapes and legacy industry provide hotspots for riverine greenhouse gases: A source-to-sea study of the River Clyde

Brown, Alison; Bass, Adrian M.; Skiba, U.; MacDonald, John; Pickard, Amy

doi:10.1016/j.watres.2023.119969

Cited by 14 publications

(4 citation statements)

References 71 publications

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“…While human disturbed rivers show diverse CO 2 emission patterns, the CH 4 dynamics in these river systems are surprisingly consistent, with the pCH 4 in rivers draining anthropogenically modified watersheds higher than those with less human disturbances (Brown et al, 2023;Tang et al, 2021). For lentic waters, eutrophic lakes with high nutrient loadings also have much higher dissolved CH 4 concentrations and fluxes due largely to elevated CH 4 production under anaerobic conditions (Sun et al, 2021;Zhou et al, 2018).…”

Section: Water Pollution and Eutrophicationmentioning

confidence: 87%

“…Land use practices can influence the input of OC and nutrients into inland waters and thus the dissolved GHG dynamics (Brown et al., 2023). Rivers flowing through urban areas receive large amounts of sewage, which is enriched in CH 4 originating from sewage treatment plants or sewage pipes (Park et al., 2018).…”

Section: Driving Factors Of Carbon Emissions From Chinese Inland Watersmentioning

confidence: 99%

“…This is because anthropogenically modified DOC is more labile and accessible to microbes for decomposition (Williams et al, 2010). Meanwhile, the elevated nutrient levels due to agricultural and urban effluent inputs can promote the decomposition of OC within the water column or in benthic sediments (Brown et al (2023); Figure 4). At the local scale, however, eutrophication of free-flowing rivers and lentic waterbodies could also contribute to CO 2 uptake by enhancing aquatic photosynthesis, and even drive a shift in CO 2 sourcesink dynamics as mentioned earlier (Bellamy & Bauer, 2017;Sun et al, 2021).…”

Section: Water Pollution and Eutrophicationmentioning

confidence: 99%

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Carbon Emissions From Chinese Inland Waters: Current Progress and Future Challenges

Yang,

Chen,

et al. 2024

JGR Biogeosciences

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Inland waters are significant emitters of greenhouse gases for the atmosphere and play an important role in the global carbon cycle. With a vast land area in East Asia spanning a broad range of climatic conditions, China has a large number of natural and human‐made water bodies. These inland water systems are of global importance because of their high carbon emission fluxes. Over the past decades, China has experienced unprecedented environmental changes driven by rapid economic development, which have profoundly modified its inland water carbon biogeochemistry and associated emissions. This review focuses on carbon dioxide (CO2) and methane (CH4) emission dynamics from China's inland waters in response to global change. Major drivers of CO2 and CH4 emissions, including aquatic metabolism, hydrological and climatic factors, and prevailing human impacts, are examined. To advance our understanding of carbon emissions from China's inland waters, we further identify several critical knowledge gaps, such as inadequate research in headwater streams and the climate‐sensitive Tibetan Plateau aquatic ecosystems. Furthermore, insufficient understanding of carbon emissions from inland waters undergoing extensive human interventions (e.g., damming, flow regulation, pollution, and farming practices in aquaculture ponds) is highlighted. We suggest that future efforts should be made to better capture the spatiotemporal heterogeneity in dissolved CO2 and CH4 concentrations and fluxes across China as well as their long‐term trends. To overcome uncertainties in carbon sources and current flux estimates, future research to mechanistically understand carbon transport and transformation in Chinese inland waters and their underlying processes is particularly needed.

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Section: Water Pollution and Eutrophicationmentioning

confidence: 87%

Section: Driving Factors Of Carbon Emissions From Chinese Inland Watersmentioning

confidence: 99%

Section: Water Pollution and Eutrophicationmentioning

confidence: 99%

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Carbon Emissions From Chinese Inland Waters: Current Progress and Future Challenges

Yang,

Chen,

et al. 2024

JGR Biogeosciences

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“…This pollution has negative impacts not only on the environment but also on the organisms living within it. Consequently, the primary sources of water pollution predominantly come from human activities, including urban discharges of organic pollutants, as well as contributions from agriculture and livestock, like pesticides and fertilizers, and various industrial processes [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Use of Zero-Valent Iron Nanoparticles (nZVIs) from Environmentally Friendly Synthesis for the Removal of Dyes from Water—A Review

Rodríguez-Rasero,

Montes-Jimenez,

Alexandre-Franco

et al. 2024

Water

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This review article addresses the increasing environmental concerns posed by synthetic dyes in water, exploring innovative approaches for their removal with a focus on zero-valent iron nanoparticles (nZVIs) synthesized through environmentally friendly methods. The article begins by highlighting the persistent nature of synthetic dyes and the limitations of conventional degradation processes. The role of nanoparticles in environmental applications is then discussed, covering diverse methods for metallic nanoparticle production aligned with green chemistry principles. Various methods, including the incorporation of secondary metals, surface coating, emulsification, fixed support, encapsulation, and electrostatic stabilization, are detailed in relation to the stabilization of nZVIs. A novel aspect is introduced in the use of plant extract or biomimetic approaches for chemical reduction during nZVI synthesis. The review investigates the specific challenges posed by dye pollution in wastewater from industrial sources, particularly in the context of garment coloring. Current approaches for dye removal in aqueous environments are discussed, with an emphasis on the effectiveness of green-synthesized nZVIs. The article concludes by offering insights into future perspectives and challenges in the field. The intricate landscape of environmentally friendly nZVI synthesis has been presented, showcasing its potential as a sustainable solution for addressing dye pollution in water.

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Divergent drivers of the spatial variation in greenhouse gas concentrations and fluxes along the Rhine River and the Mittelland Canal in Germany

Mwanake,

Imhof,

Kiese

2024

Environ Sci Pollut Res

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Lotic ecosystems are sources of greenhouse gases (GHGs) to the atmosphere, but their emissions are uncertain due to longitudinal GHG heterogeneities associated with point source pollution from anthropogenic activities. In this study, we quantified summer concentrations and fluxes of carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and dinitrogen (N2), as well as several water quality parameters along the Rhine River and the Mittelland Canal, two critical inland waterways in Germany. Our main objectives were to compare GHG concentrations and fluxes along the two ecosystems and to determine the main driving factors responsible for their longitudinal GHG heterogeneities. The results indicated that the two ecosystems were sources of GHG fluxes to the atmosphere, with the Mittelland Canal being a hotspot for CH4 and N2O fluxes. We also found significant longitudinal GHG flux discontinuities along the mainstems of both ecosystems, which were mainly driven by divergent drivers. Along the Mittelland Canal, peak CO2 and CH4 fluxes coincided with point pollution sources such as a joining river tributary or the presence of harbors, while harbors and in-situ biogeochemical processes such as methanogenesis and respiration mainly explained CH4 and CO2 hotspots along the Rhine River. In contrast to CO2 and CH4 fluxes, N2O longitudinal trends along the two lotic ecosystems were better predicted by in-situ parameters such as chlorophyll-a concentrations and N2 fluxes. Based on a positive relationship with N2 fluxes, we hypothesized that in-situ denitrification was driving N2O hotspots in the Canal, while a negative relationship with N2 in the Rhine River suggested that coupled biological N2 fixation and nitrification accounted for N2O hotspots. These findings stress the need to include N2 flux estimates in GHG studies, as it can potentially improve our understanding of whether nitrogen is fixed through N2 fixation or lost through denitrification.

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Urban landscapes and legacy industry provide hotspots for riverine greenhouse gases: A source-to-sea study of the River Clyde

Cited by 14 publications

References 71 publications

Carbon Emissions From Chinese Inland Waters: Current Progress and Future Challenges

Carbon Emissions From Chinese Inland Waters: Current Progress and Future Challenges

Use of Zero-Valent Iron Nanoparticles (nZVIs) from Environmentally Friendly Synthesis for the Removal of Dyes from Water—A Review

Divergent drivers of the spatial variation in greenhouse gas concentrations and fluxes along the Rhine River and the Mittelland Canal in Germany

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