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61,005 resultsShowing papers similar to The effect and mechanism of microplastics to the N2O emission in underground and aboveground wastewater treatment plants
ClearInsights into N2O turnovers under polyethylene terephthalate microplastics stress in mainstream biological nitrogen removal process
Long-term exposure of biological nitrogen removal (BNR) wastewater systems to polyethylene terephthalate microplastics at concentrations up to 500 micrograms per liter altered nitrous oxide (N2O) production and reduction during denitrification over 100-plus days of treatment. The findings suggest MPs in municipal wastewater could inadvertently increase greenhouse gas emissions from wastewater treatment plants.
Microplastic diversity stimulates N2O emission during NO3−-N transformation by altering microbial interaction and electron consumption in eutrophic water
Researchers examined how mixtures of different microplastic types in eutrophic water bodies affect nitrous oxide emissions during nitrogen transformation. They found that greater microplastic diversity significantly increased N2O emissions by altering microbial community interactions and electron transfer processes. The study suggests that the combined presence of multiple microplastic types may amplify their environmental impact on greenhouse gas emissions from water systems.
Microplastics promote N2O emissions by enhancing nitrification via ammonia-oxidizing bacteria in estuarine and coastal sediments
Incubation experiments with sediments from China's Yangtze River estuary found that polyethylene, polypropylene, and PET microplastics all significantly increased nitrous oxide (N2O) emissions — a potent greenhouse gas — by stimulating ammonia-oxidizing bacteria (AOB) rather than the archaea that normally dominate nitrogen cycling. Genomic analysis revealed that these bacteria carry enzymes capable of degrading plastic, possibly explaining why they thrive in plastic-contaminated sediments. This links microplastic pollution to climate change through an overlooked pathway: disrupting coastal nitrogen cycling and increasing greenhouse gas emissions.
Microplastics distribution characteristics in typical inflow rivers of Taihu lake: Linking to nitrous oxide emission and microbial analysis
Researchers measured microplastic abundance in inflow rivers of China's Taihu Lake and linked it to elevated nitrous oxide (N2O) emissions from surface water and sediment. Microplastic-associated shifts in microbial communities appeared to drive increased denitrification-related N2O flux, connecting plastic pollution to greenhouse gas cycling.
The impact of microplastics and nanoplastics on biological nitrogen removal processes: Exacerbating the greenhouse effect
This review examines how microplastics and nanoplastics accumulate in wastewater treatment plants and interfere with the biological processes that remove nitrogen from water. The disruption leads to increased emissions of nitrous oxide, a powerful greenhouse gas, making the problem both an environmental health concern and a climate issue. The findings suggest that microplastic contamination in wastewater is undermining treatment effectiveness while simultaneously contributing to global warming.
System-dependent effects and mechanisms of microplastics/nanoplastics on nitrogen and phosphorus removal from wastewater treatment and N2O emission
Researchers reviewed the system-dependent effects of microplastics and nanoplastics on nitrogen and phosphorus removal efficiency across various wastewater treatment systems, including activated sludge, constructed wetlands, and membrane bioreactors. The study found that these plastic particles also impact nitrous oxide emissions, with effects varying significantly depending on the treatment technology used.
Smaller sizes of polyethylene terephthalate microplastics mainly stimulate heterotrophic N2O production in aerobic granular sludge systems
Researchers found that smaller PET microplastics (0.1 mm) more significantly stimulated nitrous oxide production in aerobic granular sludge wastewater treatment systems compared to larger particles. The smaller particles inhibited denitrifying metabolism and reduced the activity of enzymes responsible for consuming nitrous oxide, a potent greenhouse gas. The study suggests that microplastic contamination in wastewater treatment plants could undermine efforts toward carbon neutrality by increasing greenhouse gas emissions.
Exploring the potential impacts of microplastics on greenhouse gas emissions in wastewater treatment
This review analyzed how microplastics in wastewater treatment plants affect greenhouse gas (GHG) emissions, focusing on mechanisms by which microplastics alter microbial communities and their metabolic processes. The plastisphere was identified as a key site for altered methane and nitrous oxide production, with implications for climate reporting from the water sector.
Polyvinyl Chloride Microplastics Facilitate Nitrous Oxide Production in Partial Nitritation Systems
Researchers found that PVC microplastics in wastewater treatment systems can increase the production of nitrous oxide, a potent greenhouse gas. Higher concentrations of these plastic particles disrupted normal nitrogen-processing activity, while lower doses had minimal effect on overall system performance.
A review of microplastics stress on nitrogen conversion and nitrous oxide emissions from biological wastewater treatment: Efficiency, mechanism and prospects
This review analyzes how microplastics affect nitrogen conversion processes and nitrous oxide emissions during biological wastewater treatment. Researchers found that microplastics can disrupt key nitrogen-cycling steps including nitrification and denitrification, potentially increasing emissions of the potent greenhouse gas nitrous oxide. The study highlights the dual environmental concern of microplastics interfering with both water treatment efficiency and climate-relevant gas emissions.
Effects of microplastics on N2O production and reduction potential in crop soils of northern China
This study examined how polyethylene and polypropylene microplastics at concentrations of 0.5 to 3% affect nitrous oxide production and reduction potential in crop soils from northern China. Results showed that microplastic contamination altered N2O fluxes in vegetable soils by disrupting denitrification pathways, with implications for agricultural greenhouse gas emissions.
Effect of Polypropylene Microplastics Concentration on Wastewater Denitrification
Researchers investigated the effect of polypropylene microplastic concentration on wastewater denitrification, finding that PP microplastics impaired the NO2-N reduction step and increased greenhouse gas N2O production in a concentration-dependent manner, with significant NO2-N accumulation observed at 60 mg/L, while NO3-N removal remained largely unaffected.
Reshaping the plastisphere upon deposition: Promote N2O production through affecting sediment microbial communities in aquaculture pond
This study examined how microplastics deposited in aquaculture pond sediments shape microbial biofilm communities (the plastisphere) and affect the broader sediment microbial community, including nitrogen-cycling bacteria involved in nitrous oxide production. Results showed that microplastics promoted N2O emissions by altering the sediment microbial structure.
Microplastics stimulated nitrous oxide emissions primarily through denitrification: A meta-analysis
Meta-analysis of 60 studies found that microplastic exposure increased soil nitrous oxide (N2O) emissions by 140.6%, primarily by stimulating denitrification rates (up 17.8%) and denitrifier gene abundance (up 10.6%), while nitrification remained unaffected. This resulted in a 38.8% increase in soil nitrite and a 22.4% decrease in nitrate.
Microplastics transport and impact on nitrogen cycling and N2O emissions in estuaries
This review synthesized evidence on how microplastics disrupt nitrogen cycling and amplify nitrous oxide emissions in estuarine ecosystems, proposing an integrative conceptual model. Microplastics affect nitrogen transformation through adsorption of nitrogenous compounds, microbial community restructuring, enzymatic inhibition, and promotion of incomplete denitrification within plastisphere biofilms.
Estuarine plastisphere as an overlooked source of N2O production
Researchers found that the "plastisphere" — the community of microbes that colonizes floating plastic debris in estuaries — produces more nitrous oxide (a potent greenhouse gas) than surrounding water, revealing that plastic pollution may be quietly contributing to climate change through altered microbial chemistry.
Biodegradable Microplastics Increase N2O Emission from Denitrifying Sludge More Than Conventional Microplastics
Researchers compared how biodegradable and conventional microplastics affect nitrous oxide emissions during wastewater denitrification. They found that biodegradable microplastics actually increased nitrous oxide production more than conventional plastics by serving as an additional carbon source that disrupted the normal denitrification process. The study challenges the assumption that biodegradable plastics are always environmentally preferable, at least in wastewater treatment settings.
Impact of microplastics on microbial community structure in the Qiantang river: A potential source of N2O emissions
Researchers examined how microplastics affect microbial community structure in the Qiantang River, finding that plastic contamination selects for specific bacterial taxa and alters the functional composition of river microbial communities.
Microplastic composition-dependent effects on N2O emissions driven by changes in soil N process and microbial communities
This study found that biodegradable and conventional microplastics both reduced nitrous oxide emissions from plant-soil systems by 17-32%, but through different mechanisms: polyethylene promoted complete denitrification, PLA suppressed a key denitrification gene, and PBAT inhibited both nitrification and denitrification. A companion meta-analysis of 14 plant-soil studies confirmed that microplastics reduce N2O emissions by an average of 22% in vegetated systems.
Heightened threat of aged microplastics in constructed wetlands: impacts on nitrogen cycles and greenhouse gas emissions
Researchers studied the effects of aged fibrous microplastics on nitrogen cycling and greenhouse gas emissions in constructed wetlands and found that high concentrations of aged MPs reduced nitrogen removal efficiency and increased N₂O emissions compared to pristine MPs. The results suggest aging intensifies the environmental disruption caused by microplastics in treatment wetlands.
Effects of microplastics on sedimentary greenhouse gas emissions and underlying microbiome-mediated mechanisms: A comparison of sediments from distinct altitudes
Researchers compared how PVC and polylactic acid microplastics affect greenhouse gas emissions from river sediments at different altitudes along the Yellow River. The study found that both types of microplastics increased carbon dioxide emissions by promoting the growth of organic-matter-degrading microbes, while PVC specifically boosted nitrous oxide emissions by enriching denitrifying bacteria.
Polyethylene microplastics alter the microbial functional gene abundances and increase nitrous oxide emissions from paddy soils
Researchers found that polyethylene microplastics in paddy soils significantly increased nitrous oxide emissions by altering microbial community structure and functional gene abundances related to nitrogen cycling.
Insight into effect of polyethylene microplastic on nitrogen removal in moving bed biofilm reactor: Focusing on microbial community and species interactions
Researchers studied how polyethylene microplastics affect nitrogen removal in wastewater treatment bioreactors and found that low concentrations slightly improved the process, while higher concentrations disrupted it. The microplastics changed the microbial communities responsible for breaking down nitrogen in wastewater. This matters because less effective wastewater treatment means more nitrogen pollution in waterways, and microplastics entering treatment plants could reduce their ability to clean water effectively.
[Advances in the Effects of Microplastics on Soil N2O Emissions and Nitrogen Transformation].
This review synthesizes current research on how microplastics affect soil nitrogen cycling, including N2O emissions, nitrogen transformation processes, functional enzyme activity, and nitrogen-related genes, highlighting inconsistent findings due to variability in microplastic properties, experimental conditions, and spatial-temporal scales.