A5103889870- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric aerosols and clouds
- COVID-19 impact on air quality
- Atmospheric Ozone and Climate
- Nanomaterials and Printing Technologies
- Wetland Management and Conservation
- Advanced Data Storage Technologies
- Odor and Emission Control Technologies
- Innovative Microfluidic and Catalytic Techniques Innovation
- Space Satellite Systems and Control
- Planetary Science and Exploration
- Astro and Planetary Science
Tsinghua University
2017-2024
State Key Joint Laboratory of Environment Simulation and Pollution Control
2017-2024
Abstract. Severe winter haze accompanied by high concentrations of fine particulate matter (PM2.5) occurs frequently in the North China Plain and threatens public health. Organic (OM) sulfate are recognized as major components PM2.5, while atmospheric models often fail to predict their during severe due incomplete understanding secondary aerosol formation mechanisms. By using a novel combination single-particle mass spectrometry an optimized ion chromatography method, here we show that...
This paper investigates the breakup of droplets in a T-junction microchannel, enhanced by strategic placement an isosceles triangular obstacle. Numerical simulations using phase field method reveal that primary is mainly influenced shear force, pressure drop, wall contact angle, and obstacle position. It found droplet exhibits three distinct states: breakup, non-breakup, merge after breakup. The results show wettability affects morphology velocity but has minor impact on modes volume ratio...
Abstract. Continuous field observations of haze pollution were conducted in winter and summer during 2015 Zibo, a highly industrialized city the North China Plain that is adjacent to Jing-Jin-Ji area. PM2.5 concentration averaged 146.7 ± 85.8 82.2 44.3 μg m−3 summer, respectively. The chemical component contributions showed obvious seasonal variation. Organics high winter, but secondary inorganic aerosols (SIA) summer. From non-haze days, SIA increased, implying an important role processes...
Organosulfur and organonitrogen compounds (OrgSs OrgNs) notably influence haze formation, reflecting the intricacies of sulfur nitrogen chemistry in atmospheric process. Despite this, a comprehensive understanding OrgSs OrgNs remains elusive. Here, we conducted molecular analyses PM
Tianjin, a city located in North China, is heavily polluted with frequent haze, particularly winter. In this study, continuous online field observations of the sulfate, nitrate, ammonium, PM2.5, and gaseous pollutant concentrations addition to meteorological parameters were conducted Tianjin during 2014–2015 winter (December–January–February). The PM2.5 ranged from 5.6 495.6 µg m–3, an average value 112.2 ± 96.1 m–3. worst pollution was observed January, when levels on 10% days exceeded 250...
<p>Organic aerosols (OA) are major components of fine particulate matter, yet their formation mechanism remains unclear, especially in polluted environments. Laboratory studies have shown that the OA processes may be different under irradiated and dark conditions, but few explored this aspect ambient air. Here we investigate diurnal chemical composition carbonaceous particles during winter Beijing using aerosol time-of-flight mass spectrometry. Our results show 84.5% undergo...