A5003103100- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Odor and Emission Control Technologies
- Toxic Organic Pollutants Impact
- Pesticide Exposure and Toxicity
- Atmospheric and Environmental Gas Dynamics
- Mine drainage and remediation techniques
- Analytical Chemistry and Chromatography
- Pesticide and Herbicide Environmental Studies
- Air Quality Monitoring and Forecasting
- Wind and Air Flow Studies
- Mass Spectrometry Techniques and Applications
- Atmospheric Ozone and Climate
- Marine and coastal ecosystems
- Vehicle emissions and performance
- Isotope Analysis in Ecology
Hong Kong University of Science and Technology
2015-2025
University of Hong Kong
2015-2025
Abstract. Humic-like substances (HULIS), the hydrophobic part of water-soluble organic carbon (WSOC), account for a significant fraction PM2.5 mass. Their source studies are so far largely qualitative. In this study, HULIS and WSOC were determined in 100 samples collected 2009 at an urban site (Guangzhou) suburban (Nansha) Pearl River Delta South China. The annual average concentration was 4.83 4.71 μg m−3, constituting 8.5 10.2% mass, while HULIS-C (the component HULIS) contributed 48 57%...
Environmental contextChina has been experiencing severe particulate pollution and frequent haze episodes in recent years. We compare the molecular composition of urban organic aerosols on clear hazy days Beijing by high-resolution mass spectrometry. The comparative study shows that oxidation, sulfation nitrification processes actively involve precursors anthropogenic origin polluted atmosphere. AbstractHaze frequently affected many cities threatened human health China. Detailed knowledge...
Organosulfates (OSs) derived from biogenic volatile organic compounds are important signifying interactions between anthropogenic sulfur pollution and natural emission. In this work, we substantially expand the OS standard library through chemical synthesis of 26 α-hydroxy standards eight monoterpenes (i.e., α- β-pinene, limonene, sabinene, Δ3-carene, terpinolene, γ-terpinene) two sesquiterpenes α-humulene β-caryophyllene). The sulfation unsymmetrically substituted 1,2-diol intermediates...
Thermal desorption coupled with comprehensive two-dimensional gas chromatography and quadrupole mass spectrometry (TD-GC×GC-qMS) was utilized to identify semi-quantify alkylated polycyclic aromatic hydrocarbons (alkyl PAHs). The effectiveness of this GC×GC-qMS technique for qualitative analysis confirmed through its high detection frequency, consistent retention times, reasonably similar spectra the NIST library, moderate variations in from sample sample. Taking advantage capability isolate...
Abstract. HUmic-LIke Substances (HULIS), the hydrophobic part of water soluble organic carbon (WSOC), account for a significant fraction PM2.5 mass. Their source studies are so far largely qualitative. In this study, HULIS and WSOC were determined in 100 samples collected 2009 at an urban site (Guangzhou) suburban (Nansha) Pearl River Delta South China. The annual average concentration was 4.83 4.71 μg m−3, constituting 8.5 10.2% mass, while HULIS-C (the component HULIS) contributed 48 57%...
Organosulfates (OSs) are formed from volatile organic compounds (VOCs) and their oxidation products in the presence of sulfate particles. While OSs known to represent an important component secondary aerosol, knowledge formation driving force, mechanisms, environmental impact have not been well constrained. In this study, we report ambient observations C2-3 oxygenated VOCs derived (C2-3 OSs) at a suburban location Hong Kong autumn 2016. The OSs, including glycoaldehyde sulfate,...