Experimental evidence for viral impact on microbial community, nitrification, and denitrification in an agriculture soil

Journal of Hazardous Materials, Год журнала: 2025, Номер 489, С. 137532 - 137532

Опубликована: Фев. 8, 2025

Язык: Английский

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Polyvinyl Chloride Microplastics Facilitate Nitrous Oxide Production in Partial Nitritation Systems

Environmental Science & Technology, Год журнала: 2024, Номер 58(4), С. 1954 - 1965

Опубликована: Янв. 19, 2024

Partial nitritation (PN) is an important partner with anammox in the sidestream line treating high-strength wastewater and primarily contributes to nitrous oxide (N2O) emissions such a hybrid system, which also suffers from ubiquitous microplastics because of growing usage disposal levels plastics. In this study, influences polyvinyl chloride (PVC-MPs) on N2O-contributing pathways were experimentally revealed fill knowledge gap N2O emission PN system under stress. The long-term results showed that overall performance was hardly affected by low-dose PVC-MPs (0.5 mg/L) while obviously deteriorated high dose (5 mg/L). According batch tests, reduced biomass-specific ammonia oxidation rates (AORs) 5.78–21.94% stimulated aerobic production 9.22–88.36%. Further, upon increasing dissolved oxygen concentrations 0.3 0.9 mg O2/L, degree AOR inhibition increased but stimulation lightened. Site preference analysis combination metabolic inhibitors demonstrated contributions hydroxylamine heterotrophic denitrification at O2/L enhanced 18.84 10.34%, respectively, accompanied corresponding decreased contribution nitrifier denitrification. Finally, underlying mechanisms proposed for negative bisphenol A leaching reactive species production, led more cell death, altered sludge properties, reshaped microbial communities, further resulting emission. Overall, work implied are hidden danger cannot be ignored system.

Язык: Английский

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Sources and hydrogeochemical processes of groundwater under multiple water source recharge condition

The Science of The Total Environment, Год журнала: 2023, Номер 903, С. 166660 - 166660

Опубликована: Авг. 31, 2023

Язык: Английский

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Promoting the Achievement of wastewater treatment by microalgae-based co-culture systems: From interactions mechanisms to pollution control performance

Energy Conversion and Management, Год журнала: 2024, Номер 320, С. 118981 - 118981

Опубликована: Авг. 30, 2024

Язык: Английский

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Smaller sizes of polyethylene terephthalate microplastics mainly stimulate heterotrophic N2O production in aerobic granular sludge systems

Water Research X, Год журнала: 2024, Номер 27, С. 100299 - 100299

Опубликована: Дек. 27, 2024

Widespread polyethylene terephthalate microplastics (PET MPs) have played unintended role in nitrous oxide (N2O) turnovers (i.e., production and consumption) at wastewater treatment plants (WWTPs). Mainstream aerobic granular sludge (AGS) systems possess potentially strong N2O-sink capability, which may be reduced by PET MPs stress through altering N2O-contributing pathways, electron transfer, microbial community structures. In this study, the effects of with two common particle sizes effluent from WWTPs (0.1 0.5 mm) on N2O turnovers, pathways capability were systematically disclosed AGS a series biochemical tests molecular biological means to achieve goal carbon neutrality. The results indicated that 0.1 mm could more significantly stimulate inhibiting denitrifying metabolism, compared control systems. Specifically, slightly increased relative abundance Nitrosomonas, reducing yields via promoting hydroxylamine (NH2OH) oxidation pathway during nitrification. Also, inhibited transport system activities reductase, hindering reduction denitrification. Most importantly, apparently based ratio reductase gene nitrite gene.

Язык: Английский

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Fe(II) Oxidation Shaped Functional Genes and Bacteria Involved in Denitrification and Dissimilatory Nitrate Reduction to Ammonium from Different Paddy Soils

Environmental Science & Technology, Год журнала: 2023, Номер 57(50), С. 21156 - 21167

Опубликована: Дек. 8, 2023

Microbial nitrate reduction can drive Fe(II) oxidation in anoxic environments, affecting the nitrous oxide emission and ammonium availability. The nitrate-reducing usually causes severe cell encrustation via chemodenitrification potentially inhibits bacterial activity due to blocking effect of secondary minerals. However, it remains unclear how subsequent affect functional genes bacteria for denitrification dissimilatory (DNRA). Here, were enriched from different paddy soils with without under conditions. addition decelerated increased NO2– accumulation, rapid periplasm on surface. N2O accumulation was lower treatment than that only, although proportions NH4+ reduced NO3– low (3.25% ∼ 6.51%) at end incubation regardless addition. dominant varied conditions, while shaped a similar microbial community, including Dechloromonas, Azospira, Pseudomonas. relative abundance napAB, nirS, norBC, nosZ, nirBD but decreased narG nrfA, suggesting favored NO2–-to-NH4+ cytoplasm. Dechloromonas dominated NO2–-to-N2O reduction, Thauera mediated periplasmic cytoplasmic during oxidation. showed much genera, resulting slow limited production. These findings provide new insights into response DNRA environments.

Язык: Английский

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Relative contribution of ammonia-oxidizing bacteria and denitrifying fungi to N2O production during rice straw composting with biochar and biogas residue amendments

Bioresource Technology, Год журнала: 2023, Номер 390, С. 129891 - 129891

Опубликована: Окт. 18, 2023

Язык: Английский

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Satellite-Based Estimation of Nitrous Oxide Concentration and Emission in a Large Estuary

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Фев. 5, 2025

Estuaries are nitrous oxide (N2O) emission hotspots and play an important role in the global N2O budget. However, large spatiotemporal variability of complex estuary environments is challenging for large-scale monitoring budget quantification. This study retrieved water environmental variables associated with cycling based on satellite imagery developed a machine learning model concentration estimations. The was adopted China's Pearl River Estuary to assess dynamics as well annual total diffusive emissions between 2003 2022. Results showed significant concentrations emissions. ranged from 0.76 1.09 Gg (0.95 average) over past two decades. Additionally, results seasonal highest contribution during spring (31 ± 3%) lowest autumn (21 1%). Meanwhile, peaked at river outlets decreased outward direction. Spatial contributed 43% while covering 20% area. Finally, SHapley Additive exPlanations (SHAP) adopted, which that temperature salinity, followed by dissolved inorganic nitrogen, were key input features influencing estuarine demonstrates potential remote sensing estimation

Язык: Английский

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Ecological restoration reduces greenhouse gas emissions by altering planktonic and sedimentary microbial communities in a shallow eutrophic lake

Environmental Research, Год журнала: 2025, Номер unknown, С. 121400 - 121400

Опубликована: Март 1, 2025

Язык: Английский

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The potential linkage between sediment oxygen demand and microbes and its contribution to the dissolved oxygen depletion in the Gan River

Frontiers in Microbiology, Год журнала: 2024, Номер 15

Опубликована: Июль 31, 2024

The role of sediment oxygen demand (SOD) in causing dissolved (DO) depletion is widely acknowledged, with previous studies mainly focusing on chemical and biological SOD separately. However, the relationship between putative functions microbes SOD, their impact DO overlying water, remains unclear. In this study, was observed downstream Gan River during summer. Sediments were sampled from three sites (YZ, Down1, Down2) one upstream site (CK) as a control. Aquatic physicochemical parameters levels measured, microbial inferred taxonomic genes through analyses 16S rRNA gene. results showed that exhibited higher rate compared to CK. community structure influenced by spatial variation Proteobacteria, Chloroflexi, Bacteroidota, total organic carbon (TOC) content acting significant environmental driver. A negative correlation diversity concentration (

Язык: Английский

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