Quantitative discrimination of algae multi-impacts on N2O emissions in eutrophic lakes: Implications for N2O budgets and mitigation

Wang, Yiping; Yu, Peng; Lv, Chengxu; Xu, Xiaoguang; Han, Meng; Zhou, Yanmin; Wang, Guoxiang; Lu, Yongjun

doi:10.1016/j.watres.2023.119857

Cited by 12 publications

(3 citation statements)

References 51 publications

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“…High concentrations of NO 2 – are strongly toxic to aquatic organisms and microorganisms, making fragile eutrophic ecosystems even more vulnerable. Moreover, the accumulation of NO 2 – tends to enhance the denitrification of AOB, thus increasing N 2 O emission in eutrophic environments, which are already hotspots for N 2 O emissions. , In addition, extreme conditions due to anthropogenic activities, such as wastewater shock containing high NH 4 + -N and concentrated discharge of ribosome-targeted antibiotics, may induce direct damage to the ribosomes of NOB, resulting in irreversible loss of NO 2 – oxidation. Efforts should be made to maintain the activity of ribosome biogenesis and protein synthesis within the NOB to avoid NO 2 – accumulation under these conditions.…”

Section: Resultsmentioning

confidence: 99%

Deregulation of Ribosome Biogenesis in Nitrite-Oxidizing Bacteria Leads to Nitrite Accumulation

Xiong,

Ye,

et al. 2023

Environ. Sci. Technol.

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Nitrite (NO2 –) accumulation caused by nitrite-oxidizing bacteria (NOB) inhibition in nitrification is a double-edged sword, i.e., a disaster in aquatic environments but a hope for innovating nitrogen removal technology in wastewater treatment. However, little information is available regarding the molecular mechanism of NOB inhibition at the cellular level. Herein, we investigate the response of NOB inhibition on NO2 – accumulation established by a side-stream free ammonia treatment unit in a nitrifying reactor using integrated metagenomics and metaproteomics. Results showed that compared with the baseline, the relative abundance and activity of NOB in the experimental stage decreased by 91.64 and 68.66%, respectively, directly resulting in a NO2 – accumulation rate of 88%. Moreover, RNA polymerase, translation factors, and aa-tRNA ligase were significantly downregulated, indicating that protein synthesis in NOB was interfered during NO2 – accumulation. Further investigations showed that ribosomal proteins and GTPases, responsible for bindings between either ribosomal proteins and rRNA or ribosome subunits, were remarkably downregulated. This suggests that ribosome biogenesis was severely disrupted, which might be the key reason for the inhibited protein synthesis. Our findings fill a knowledge gap regarding the underlying mechanisms of NO2 – accumulation, which would be beneficial for regulating the accumulation of NO2 – in aquatic environments and engineered systems.

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Section: Resultsmentioning

confidence: 99%

Deregulation of Ribosome Biogenesis in Nitrite-Oxidizing Bacteria Leads to Nitrite Accumulation

Xiong,

Ye,

et al. 2023

Environ. Sci. Technol.

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“…11−13 Processing of nitrogen by microorganisms in rivers requires substrates, reactant inputs, suitable redox conditions, and intermediate residence times and is therefore thought to occur primarily in hyporheic zones rather than in surface waters. 14,15 Therefore, in order to establish a way to reduce N 2 O, we need to know how N 2 O is produced from nitrogen fertilizer. 16−19 For example, the dissimilatory reduction of nitrate to ammonium (DNRA) in soil does not produce N 2 O.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Among the greenhouse gases, the formation mechanism of N 2 O is not well understood. − A clear point is that nitrogen fertilizers consisting of ammonia produced by the Haber–Bosch process are one of the main sources of N 2 O . However, as the population is expected to grow in the future, it will be difficult to reduce the amount of nitrogen fertilizer used. − Processing of nitrogen by microorganisms in rivers requires substrates, reactant inputs, suitable redox conditions, and intermediate residence times and is therefore thought to occur primarily in hyporheic zones rather than in surface waters. , Therefore, in order to establish a way to reduce N 2 O, we need to know how N 2 O is produced from nitrogen fertilizer. − For example, the dissimilatory reduction of nitrate to ammonium (DNRA) in soil does not produce N 2 O. , Additionally, denitrification and nitrification, which is used as a purification method for septic tanks, is thought to be less likely to generate N 2 O . However, much of the nitrogen fertilizer that remains in the soil without being absorbed by plants is broken down by nitrifying and denitrifying bacteria.…”

Section: Introductionmentioning

confidence: 99%

Elucidation of the Mechanism of Greenhouse Gas Generation by Abiotic Transformation of Nutrient Ions Flowing into Closed Water Areas with Little Phytoplankton

Noda,

Asada,

Nagao

2024

ACS EST Water

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In Mikawa Bay and Ise Bay, many tidal flats, shallow areas, and seaweed beds have been lost due to land reclamation, and the pollution inflow from domestic and industrial wastewater has increased, causing environmental deterioration such as red and blue tides. To prevent their occurrence, the hyporheic zone of the brackish lake leading to these bays was dredged and covered with sand, and sewerage systems were constructed around the surrounding areas. Furthermore, the water in this lake is regularly substituted with new river water but unregulated agricultural wastewater flows into the lake. Nutrient ions from nitrogen fertilizers in this wastewater are passively decomposed and released into the atmosphere as a greenhouse gas N 2 O. We report that ClO 2 − ions, classified as disinfection byproducts detected in this water body, promote the production of • N and • NO radicals through the abiotic transformation of NH 4 NO 3 from nitrogen fertilizers in aqueous solutions. Because these radicals are highly reactive and have a small energy gap between singly occupied molecular orbital (SOMOs), they generate N 2 O through a heterogeneous coupling reaction and release N 2 O from water to the atmosphere. Abiotic transformation mechanisms of nutrient ions provide information for resolving biodiversity crises and N 2 O emissions problems associated with marine environmental restoration. KEYWORDS: *N radical, • NO radical, nitrogen cycle, ClO 2 − ion, nitrogen fertilizer, nutrient ions, greenhouse gas, N 2 O

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Elevated CO2 exacerbates the risk of methylmercury exposure in consuming aquatic products: Evidence from a complex paddy wetland ecosystem

Wu,

Chen,

Zong

et al. 2024

Environmental Pollution

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Quantitative discrimination of algae multi-impacts on N2O emissions in eutrophic lakes: Implications for N2O budgets and mitigation

Cited by 12 publications

References 51 publications

Deregulation of Ribosome Biogenesis in Nitrite-Oxidizing Bacteria Leads to Nitrite Accumulation

Deregulation of Ribosome Biogenesis in Nitrite-Oxidizing Bacteria Leads to Nitrite Accumulation

Elucidation of the Mechanism of Greenhouse Gas Generation by Abiotic Transformation of Nutrient Ions Flowing into Closed Water Areas with Little Phytoplankton

Elevated CO2 exacerbates the risk of methylmercury exposure in consuming aquatic products: Evidence from a complex paddy wetland ecosystem

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