Significant Changes of δ¹⁵N-NO_x in Diesel Vehicle Emissions with Emission Standards and Cumulative Mileage: Insight into Isotope-Based NO_x Source Analysis

ACS ES&T Air, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 30, 2025

Language: Английский

The Isotopic Characteristics, Sources, and Formation Pathways of Atmospheric Sulfate and Nitrate in the South China Sea

Sustainability, Journal Year: 2024, Volume and Issue: 16(20), P. 8733 - 8733

Published: Oct. 10, 2024

The South China Sea (SCS) is a crucial region for studying atmospheric aerosols, given its unique geographical location and the interaction of various natural anthropogenic sources. In this study, we measured isotopic characteristics sulfate nitrate in PM2.5 utilized Bayesian isotope mixing model (SIAR) to analyze their sources formation pathways. Sulfur values (δ34S-SO42−) were 8.7 ± 1.8‰, while nitrogen oxygen (δ15N-NO3− δ18O-NO3−) −0.9 2.4‰ 52.3 7.3‰, respectively. results revealed that was primarily influenced by marine biogenic sulfur emissions (mostly dimethyl sulfide, DMS), fossil fuel combustion, biomass burning. Nitrate dominated NO2 + •OH pathway (accounting 69.8–85.7%), with significant contributions from vehicle emissions, burning, lightning. These findings offer key insights into complex interactions between aerosol SCS, contributing broader understanding chemistry.

Language: Английский

Refined source apportionment of nitrate aerosols based on isotopes and emission inventories in coastal city of northern China

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 957, P. 177388 - 177388

Published: Nov. 18, 2024

Language: Английский