Developments in environmental science, Journal Year: 2024, Volume and Issue: unknown, P. 291 - 306
Published: Jan. 1, 2024
Language: Английский
Materials Today Communications, Journal Year: 2024, Volume and Issue: 40, P. 109405 - 109405
Published: May 31, 2024
Language: Английский
Citations
16
Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(21), P. 9227 - 9235
Published: May 16, 2024
Severe ozone (O3) pollution has been a major air quality issue and affects environmental sustainability in China. Conventional mitigation strategies focusing on reducing volatile organic compounds nitrogen oxides (NOx) remain complex challenging. Here, through field flux measurements laboratory simulations, we observe substantial nitrous acid (HONO) emissions (FHONO) enhanced by fertilizer application at an agricultural site. The observed FHONO significantly improves model performance predicting atmospheric HONO leads to regional O3 increases 37%. We also demonstrate the significant potential of nitrification inhibitors reactive nitrogen, including NOx, as much 90%, well greenhouse gases like oxide up 60%. Our findings introduce feasible concept for mitigating pollution: soil emissions. Hence, this study important implications policy decisions related control climate change.
Language: Английский
Citations
11
Atmospheric chemistry and physics, Journal Year: 2023, Volume and Issue: 23(24), P. 15733 - 15747
Published: Dec. 21, 2023
Abstract. Nitrous acid (HONO) is a crucial precursor of tropospheric hydroxyl radicals, but its sources are not fully understood. Soil recognized as an important HONO source, the lack measurements soil–atmosphere exchange flux (FHONO) has led to uncertainties in modeling atmospheric impacts and understanding reactive nitrogen budget. Herein, we conduct FHONO over agricultural fields under fertilized (FHONO-NP, normal fertilization irrigation) non-fertilized (FHONO-CK, irrigation no fertilization) treatments. Our results show that fertilizer use causes remarkable increase FHONO-NP. FHONO-NP exhibits distinct diurnal variations, with average noontime peak 152 ng N m−2 s−1. The within 3 weeks after 97.7±8.6 s−1, around 2 orders magnitude higher than before fertilization, revealing promotion effect on emissions. We also discuss other factors influencing soil emissions, such meteorological parameters properties/nutrients. Additionally, estimate emission factor 0.68±0.07 % relative applied during whole growing season summer maize. Accordingly, fertilizer-induced estimated be 22.3 60.8 Gg yr−1 North China Plain (NCP) mainland China, respectively, representing significant source. Furthermore, our observations reveal emissions sustain high level daytime HONO, enhancing oxidizing capacity aggravating O3 pollution NCP. indicate mitigate regional air effectively, future policies should consider from soils.
Language: Английский
Citations
17
Atmospheric Pollution Research, Journal Year: 2025, Volume and Issue: unknown, P. 102501 - 102501
Published: March 1, 2025
Language: Английский
Citations
0
Agriculture, Journal Year: 2025, Volume and Issue: 15(6), P. 612 - 612
Published: March 13, 2025
The emissions of reactive nitrogen (Nr) from cropland links the pedosphere and atmosphere, playing a crucial role in Earth’s cycle while significantly impacting regional climate change, air quality, human health. Among various Nr species, oxide (NO) nitrous acid (HONO) have garnered increasing attention as critical precursors to surface ozone (O3) formation due their participation photochemical reactions. While most studies focus on soils, specific contributions considering planting activities O3 pollution remain insufficiently investigated. This study applied enhanced process-based agroecological model (FEST-C*) coupled with quality (CMAQ) quantify assess across China June 2020. simulated results indicated that fertilizer-induced total emission was estimated at 1.26 Tg China, NO accounting for 0.66 HONO 0.60 Tg. North identified hotspot emissions, contributing 43% national total. peak occurred June, 169 192 Gg, respectively. Cropland contributed approximately 8% monthly mean MDA8 concentration, localized enhancements exceeding 9% agricultural hotspots summer. experienced largest increase, reaching 11.71 μg m−3, primarily intensive fertilizer application favorable climatic conditions. Conversely, reductions nighttime hourly concentrations were observed southern northern Southeast rapid titration via NO. In this study, different regions been further constrained. Incorporating into CMAQ improved simulation accuracy reduced biases predictions. offers detailed quantification contribution highlights need address management strategies.
Language: Английский
Citations
0
Journal of Environmental Sciences, Journal Year: 2025, Volume and Issue: unknown
Published: March 1, 2025
Language: Английский
Citations
0
Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 75, P. 107918 - 107918
Published: May 10, 2025
Language: Английский
Citations
0
Agronomy, Journal Year: 2024, Volume and Issue: 14(2), P. 331 - 331
Published: Feb. 5, 2024
Soil nitrite (NO2−) is an important reactive intermediate in many nitrogen transformation processes, but it unstable under acidic conditions and may be lost as gaseous N. The canonical extraction method of soil NO2− using a potassium chloride (KCl) solution greatly underestimates its concentration. To reflect the concentration more accurately, we optimized for three agricultural soils differing texture pH, alkalic fluvo-aquic Mollisol Ultisol soils, respectively. Both extractable ammonium (NH4+) nitrate (NO3−) were systematically investigated to optimize simultaneous inorganic nitrogen. effects different extractants (deionized water (DIW), un-buffered 2 mol L−1 KCl, pH-buffered KCl), shaking time (10 30 min), storage duration extracts (stored at −20 °C 1 day, 4 1, 3, 6 days) on determination investigated. results showed that KCl extractant significantly underestimated compared DIW. highest recovery was obtained by extracting with DIW 10 min all soils. Compared DIW, NH4+ NO3− extracted from increased significantly. Furthermore, content stored one day closer direct measurements fresh samples than other methods. Overall, recommended analysis min, filtering 0.45 µm filter, while shaken min. extract should analyzed within 24 h. Our study provides efficient supports studies biogeochemical cycle, e.g., investigation nitrous acid (HONO) nitric oxide (NO) emissions.
Language: Английский
Citations
1
Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 7, 2024
Language: Английский
Citations
1
Published: Dec. 27, 2023
Soil nitrite (NO2‒) is an important reactive intermediate in many nitrogen transformation processes, but it unstable under acidic conditions. Canonical extraction method of soil NO2‒ with potassium chloride (KCl) solution greatly underestimates its concentration. In order to reflect the concentration more accurately, we optimized this study. Moreover, ammonium (NH4+) and nitrate (NO3‒) were also systematically investigated achieve efficient inorganic nitrogen. The results showed that un-buffered KCl significantly underestimated compared DIW. highest recovery was obtained by extracting DIW at 10 min oscillation for three soils. Compared DIW, NH4+ NO3‒ extracted from increased significantly. Furthermore, content extracts stored 4°C one day closer directly measurements fresh samples than other storage methods. Overall, recommend analysis oscillated min, filtered a 0.45 µm filter, 30 min. extract should be analyzed within 24 hours.
Language: Английский
Citations
1