A5063445422- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Atmospheric aerosols and clouds
- Vehicle emissions and performance
- Maritime Transport Emissions and Efficiency
- Marine and coastal ecosystems
- Oil Spill Detection and Mitigation
- Magnesium Oxide Properties and Applications
- Electric Motor Design and Analysis
- Free Radicals and Antioxidants
- Mercury impact and mitigation studies
- Maritime Navigation and Safety
- Concrete and Cement Materials Research
- Recycling and utilization of industrial and municipal waste in materials production
- Water Quality and Pollution Assessment
- Magnetic Bearings and Levitation Dynamics
- Ocean Acidification Effects and Responses
- Water Quality Monitoring and Analysis
- Carbon Dioxide Capture Technologies
- Data-Driven Disease Surveillance
- Coal and Its By-products
- Magnetic Properties of Alloys
Hong Kong Polytechnic University
2024-2025
Shandong University
2018-2024
State Key Joint Laboratory of Environment Simulation and Pollution Control
2017-2024
Peking University
2017-2024
Abstract This report focuses on studying generation and/or evolution of sea-salt aerosols (SSA) basis measurements in the Northwest Pacific Ocean (NWPO), marginal seas China, at sea-beach sites and a semi-urban coastal site 2012–2015. From NWPO, we obtained smallest function super-micron SSA mass ([M ]) by local wind comparing to those previously reported. Vessel-caused wave-breaking was found greatly enhance increase [M ], which subject non-natural SSA. However, naturally enhanced indeed...
Despite their crucial roles in health and climate concerns, the gas-particle partitioning of carbonyl compounds is poorly characterized ambient atmosphere. In this study, we investigate by simultaneously measuring six (formaldehyde, acetaldehyde, acetone, propionaldehyde, glyoxal, methylglyoxal) gas particle phase at an urban site Beijing. The field-derived coefficients (Kpf) are range 10–5–10–3 m3 μg–1, corresponding effective Henry's law (KHf) should be 107–109 M atm–1. Pankow's absorptive...
The sources of atmospheric nitrous acid (HONO) have been frequently investigated in recent decades. However, the dominant mechanisms HONO formation and its significant daytime source contrasting environments remain largely unknown. In this study, 46 observational data sets were collected worldwide, underlying processes driving diurnal patterns extracted on basis principal component analysis (PCA). We identified three processes: a NOx process (PC1) that was polluted inland areas,...
Abstract. Hydrogen peroxide (H2O2) is a vital oxidant in the atmosphere and plays critical roles oxidation chemistry of both liquid aerosol phases. The partitioning H2O2 between gas phases, or phase, could affect its abundance these condensed phases eventually formation secondary components. However, processes gas-liquid gas-aerosol are still unclear, especially ambient atmosphere. In this study, field observations gas-, liquid-, aerosol-phase were carried out urban Beijing during summer...
Chlorine radicals (Cl·) are highly reactive and affect the fate of air pollutants. Several field studies in China have revealed elevated levels daytime molecular chlorine (Cl2), which, upon photolysis, release substantial amounts Cl· but poorly represented current chemical transport models. Here, we implemented a parametrization for formation Cl2 through photodissociation particulate nitrate acidic environments into regional model assessed its impact on coastal quality during autumn South...
Nitrous acid (HONO) is a crucial precursor to hydroxyl radical (OH) in the atmosphere and significantly influences atmospheric photochemical processes. Despite extensive field observations, quantitative understanding of HONO formation processes varying environments remains elusive, particularly due divergent parameters used different studies that have led contradictory conclusions. This study measured at four sites characterized by contrasting environments: an urban site Yellow River Delta,...
Atmospheric formaldehyde (HCHO) plays a critical role in atmospheric radical budgets and secondary formation of ozone particulate matter. However, HCHO is known to be significantly underestimated by regional air quality models, which indicates an incomplete understanding origins limits our comprehension its roles implications. In this study, we revealed that direct emissions from wintertime residential coal combustion north China has been current emission inventories, based on field...
Recent observations have increasingly challenged the conventional understanding of atmospheric NH3 and its potential sources in remote environments. Laboratory studies suggest that microdroplet redox generation could offer an alternative explanation. However, key questions remain: 1) Can occur ambient air? 2) Is it restricted by presence specific catalysts? 3) What factors determine efficiency via reactions? We investigate these based on adiabatic-expansion-induced perturbation performed...
Abstract Nitrated phenolic compounds in the atmosphere are receiving increasing attention due to their light absorption and biological toxicity. In this study, particulate, gaseous, cloud water samples were simultaneously collected during events at summit of Mount Tai northern China spring, summer, winter contents 11 nitrated determined. The seasonal average concentrations total particles range 7.3–27.1 ng m −3 , a little lower than those measured gas‐phase (18.3–70.6 ). Their levels...
Abstract. Nitrous acid (HONO), a vital precursor of atmospheric hydroxyl radicals (OH), has been extensively investigated to understand its characteristics and formation mechanisms. However, discerning fundamental mechanisms across diverse environments remains challenging. This study utilizes measurements from Mount Lao, coastal mountain in eastern China, an observation-based chemical box model (OBM) examine HONO budgets their subsequent impacts on oxidizing capacity. The incorporates...
While the contribution of coal combustion to atmospheric particulate matter is well-recognized, its specific role in winter haze remains insufficiently explored. In this study, we elucidate quantitative effect on pollution based high temporal resolution measurements trace metals PM2.5. We identified arsenic (As) and selenium (Se) as reliable indicators combustion, with their enrichment factors exceeding 104. The significant increase As Se concentrations (9.6-fold 7.1-fold increase) during...
Heterogeneous reactions of NO2 on surfaces seem to be an important sink for and a source HONO in the atmosphere. Although heterogeneous have been extensively investigated laboratory studies, kinetic data about this reaction real ambient are limited. Therefore, present study, we urban grime, representative surface film areas, under various experimental conditions using Teflon box system. The role that light played these was also explored. It found uptake coefficient (γ) yield both were...
The petroleum industry is a significant source of anthropogenic volatile organic compounds (VOCs), but up to now, its exact impact on urban VOCs and ozone (O3) remains unclear. This study conducted year-long VOC observations in Dongying, China, industrial region. from the (oil gas volatilization petrochemical production) were identified by employing positive matrix factorization model, their contribution O3 formation was quantitatively evaluated using an observation-based chemical box model....
Abstract Chemical processing of reactive nitrogen species, especially NO x (= + 2 ) and nitrous acid (HONO), determines the photochemical ozone production oxidation capacity in troposphere. However, sources HONO remote marine atmosphere are still poorly understood. In this work, multiphase chemistry mechanism CAPRAM model framework SPACCIM was used to study formation at Cape Verde (CVAO) October 2017, adopted with input current parameterizations for various sources. Three simulations were...
Carbonyl compounds play a crucial role in the formation of ozone (O