A5010860290- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Air Quality and Health Impacts
- Indoor Air Quality and Microbial Exposure
- Spectroscopy and Laser Applications
- Advanced Chemical Sensor Technologies
- Marine and coastal ecosystems
- Photochemistry and Electron Transfer Studies
- Atmospheric and Environmental Gas Dynamics
- Analytical Chemistry and Chromatography
- Microplastics and Plastic Pollution
- Recycling and Waste Management Techniques
- Plant responses to elevated CO2
- Water Treatment and Disinfection
- Toxic Organic Pollutants Impact
- biodegradable polymer synthesis and properties
- Biosensors and Analytical Detection
- Global Energy and Sustainability Research
- Pharmaceutical and Antibiotic Environmental Impacts
- Oil, Gas, and Environmental Issues
- Atmospheric aerosols and clouds
- Catalytic Processes in Materials Science
- Free Radicals and Antioxidants
- Chemistry and Chemical Engineering
University of Chinese Academy of Sciences
2018-2024
Guangzhou Institute of Geochemistry
2018-2024
Chinese Academy of Sciences
2018-2024
Leibniz Institute for Tropospheric Research
2023-2024
Aix-Marseille Université
2017
Centre National de la Recherche Scientifique
2017
Nitrous acid (HONO) is one of the most important photochemical precursors hydroxyl radical in sunlit urban atmosphere. The sources HONO, however, are still poorly characterized, yet there a disagreement between field observations and model results. Here, we show that light-induced NO2 heterogeneous chemistry on authentic grime can make an contribution to total HONO levels obtained results indicate effective uptake coefficients presence ultraviolet light [2.6 × 1015 photons cm–2 s–1 (300 nm <...
Nitrous acid (HONO) is an important gaseous pollutant contributing to indoor air pollution because it causes adverse health effects and the main source of hydroxyl radicals (OH). Here, we present direct measurements HONO produced through light-induced heterogeneous reactions NO2 with grime adsorbed on glass window. The uptake coefficients [γ(NO2)] plates from kitchen increased markedly (2.3 ± 0.1) × 10–6 at 0% RH (4.1 0.5) 90% RH. We report a significant quantity daytime in kitchen, compared...
The photolysis of nitrous acid (HONO) is the main initiation source hydroxyl radical (OH) which in turn oxidant controlling oxidation capacity indoor atmosphere.
Polycyclic aromatic hydrocarbons (PAHs) as constituents of urban grime and indoor surfaces can impact the photochemical conversion nitrogen dioxide (NO2) to nitrous acid (HONO) thereby impacting oxidation capacity atmosphere. In this study we investigate effect relative humidity (RH%), light intensity, NO2 concentrations on uptake coefficients (γ) solid film consisting fluorene (FL) a mixture FL Na2SO4 proxy for at ambient pressure temperature. γ(NO2) increased markedly from (5.7 ± 1.7) ×...
Cooking emissions represent a major source of air pollution in the indoor environment and exhibit adverse health effects caused by particulate matter together with volatile organic compounds (VOCs). A multitude unknown are released during cooking, some which play important roles as precursors more hazardous secondary aerosols air. Here, we applied electrospray ionization high-resolution mass spectrometry for real-time measurements VOCs particles from cooking peanut oil presence 300 ppbv...
Methoxyphenols are an important class of compounds emerging from biomass combustion, and their reactions with ozone can generate secondary organic aerosols in the atmosphere. Here, we use a vertical wetted wall flow tube reactor to evaluate effect ionic strength on heterogeneous reaction gas-phase (O3) liquid film o-vanillin (o-VL) (2-hydroxy-3-methoxybenzaldehyde), as proxy for methoxyphenols. Typical moderately acidic aerosols, at fixed pH = 5.6, uptake coefficients (γ) O3 o-VL ([o-VL] 1 ×...
A vertical wetted-wall flow-tube technique was used to explore the ionic strength effects at air-water interface in mediating sea-surface reaction between ozone (O3) and pyruvic acid (PA). The uptake coefficients of on aqueous PA increase substantially with concentrations bromide (Br-) ions, clearly indicating that dry deposition could be significantly enhanced due presence carbonyl compounds such as bromide-rich sea surface. Based observed coefficients, estimated velocity (100 ppb) for a...
Methoxyphenols are one of the most abundant classes biomarker tracers for atmospheric wood smoke pollution. The reactions oxidants (ozone, OH) with methoxyphenols can contribute to formation secondary organic aerosols (SOA). Here, first time, we use well-established vertical wetted wall flow tube (VWWFT) reactor assess effect ionic strength (I), pH, temperature, and ozone concentration on reaction kinetics acetosyringone (ACS), as a representative methoxyphenol compound. At fixed pH 3,...
Abstract Polycyclic aromatic hydrocarbons and dimethyl sulfoxide (DMSO) are ubiquitous at the sea surface. Photochemistry air‐sea interface is a potentially important source of volatile organic compounds, but relevant chemical processes currently not well known. When aqueous solutions containing mixture fluorene (FL) DMSO irradiated with actinic radiation, large suite unsaturated high molecular weight compounds appear in phase; broad variety saturated oxygenated multifunctional also observed...
The photochemical transformation processes occurring at the sea surface lead to formation of low volatility organic compounds that contribute new particle in marine boundary layer. Here, we suggest an alternative pathway organosulfur and oxygenated aliphatic compounds, initiated by sunlight-activated fluorene (FL) dimethylsulfoxide (DMSO) presence halide ions Cl–, Br–, I–. In particular, observe a prompt four typical precursors secondary aerosols, methanesulfonic acid (CH3SO3H),...
Emissions of secondary products through reactions oxidants, ozone (O3), and hydroxyl radical (·OH) with human skin lipids have become increasingly important in indoor environments. Here, we evaluate the organic compounds formed heterogeneous gaseous O3 hand by using a high-resolution quadrupole Orbitrap mass spectrometer coupled to commercial electrospray ionization (SESI) source. More than 600 ions were detected over period less 40 min real-time measurements, among which 53 characterized...
T-dependent aqueous-phase rate constants were determined for the oxidation of hydroxy aldehydes, glyceraldehyde, glycolaldehyde, and lactaldehyde, by hydroxyl radicals (•OH), sulfate (SO4•-), nitrate (NO3•). The obtained Arrhenius expressions •OH radical are: k(T,GLYCERALDEHYDE+OH•) = (3.3 ± 0.1) × 1010 exp((-960 80 K)/T)/L mol-1 s-1, k(T,GLYCOLALDEHYDE+OH•) (4.3 1011 exp((-1740 50 k(T,LACTALDEHYDE+OH•) (1.6 exp((-1410 180 s-1; SO4•- radical: k(T,GLYCERALDEHYDE+SO4•-) 109 exp((-1400...
Abstract Humic‐like substances (HULIS) are a ubiquitous reactive component of atmospheric aerosol. They participate in the formation secondary organic aerosols via chemical reactions with oxidants. Here, we assess influence transition metal ions (namely ferric iron, Fe(III)), and nitrate () on heterogeneous reaction gaseous NO 2 an aqueous film containing gallic acid (GA) or tannic (TA) as proxies for HULIS. Using vertical wetted wall flow tube technique, uptake coefficients GA TA increased...
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionNEXTORIGINAL ARTICLEThis notice is a correctionCorrection to "Ionic Strength Effect Triggers Brown Carbon Formation through Heterogeneous Ozone Processing of Ortho-Vanillin"Yiqun WangYiqun WangMore by Yiqun Wang, Majda MekicMajda MekicMore Mekic, Pan LiPan LiMore Li, Huifan DengHuifan DengMore Deng, Shiyang LiuShiyang LiuMore Liu, Bin JiangBin JiangMore Jianghttps://orcid.org/0000-0002-7453-828X, Biao JinBiao JinMore...
Nano- and microplastics (NMP), including tire wear particles (TWP), are now a global concern in the terrestrial marine environment subject of intense study. The existence NMP TWP many different environments has been reported, soil, sediment, dust, glaciers, lakes, rivers, seas, oceans. However, only few studies have examined abundance fate synthetic polymers ambient aerosol particles. dispersion, atmospheric transport deposition important steps biogeochemical cycle plastic. inconsistencies...
Crude oil contamination could serve as an important source of polycyclic aromatic hydrocarbons (PAHs) in the environment. Studying quantity, speciation, and ecological risk PAHs emanating from such provide implications for appropriate remediation techniques management. Hence, present study investigated concentrations, composition pattern, crude soil samples Niger Delta, Nigeria. The concentrations ∑29PAHs ∑16 US-EPA ranged 24230.68 to 40902.32 ng/g (average: 29972.47 ng/g) 7374.42 14212.31...