A5090653164- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Vehicle emissions and performance
- Seismic Imaging and Inversion Techniques
- Meteorological Phenomena and Simulations
- Environmental Quality and Pollution
- Odor and Emission Control Technologies
- Climate variability and models
- Tropical and Extratropical Cyclones Research
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Hydraulic Fracturing and Reservoir Analysis
- Astro and Planetary Science
- Advanced Memory and Neural Computing
- Seismic Waves and Analysis
- Geology and Paleoclimatology Research
- Advanced Chemical Sensor Technologies
- Ferroelectric and Negative Capacitance Devices
- Synthesis and biological activity
- Remote Sensing and Land Use
- Environmental Toxicology and Ecotoxicology
- Drilling and Well Engineering
Peking University
2016-2025
Beijing Technology and Business University
2025
State Key Joint Laboratory of Environment Simulation and Pollution Control
2015-2024
Peking University Cancer Hospital
2021-2024
Jiangxi Normal University
2005-2024
University of Potsdam
2022-2024
East China University of Science and Technology
2024
Xi'an University of Science and Technology
2017-2023
China Meteorological Administration
2023
Zhengzhou University
2015-2022
Abstract. A comprehensive field campaign was carried out in summer 2014 Wangdu, located the North China Plain. month of continuous OH, HO2 and RO2 measurements achieved. Observations radicals by laser-induced fluorescence (LIF) technique revealed daily maximum concentrations between (5–15) × 106 cm−3, (3–14) 108 cm−3 (3–15) for RO2, respectively. Measured OH reactivities (inverse lifetime) were 10 to 20 s−1 during daytime. The chemical box model RACM 2, including Leuven isoprene mechanism...
The ambient air quality standard for ozone is frequently exceeded in Beijing summer and autumn. Source apportionments of volatile organic compounds (VOCs), which are precursors ground-level formation, can be helpful to the further study tropospheric formation. In this study, concentrations VOCs were continuously measured with a time resolution 30 min August 2005 Beijing. By using positive matrix factorization (PMF), eight sources selected VOC species extracted. Gasoline-related emissions...
Beijing has long suffered from serious ground‐level ozone pollution, and volatile organic compounds (VOCs) play a key role in formation. To understand the chemical speciation of VOCs Beijing, nonmethane hydrocarbons (NMHCs) oxygenated (OVOCs) were measured summer nearby provinces (VOCs this work means NMHCs+OVOCs). A variation VOC mixing ratios 2004 to 2006 was observed at an urban site Beijing. The typical species, e.g., propane, propene, toluene, had comparable or lower than levels found...
Abstract. The first wintertime in situ measurements of hydroxyl (OH), hydroperoxy (HO2) and organic peroxy (RO2) radicals (ROx=OH+HO2+RO2) combination with observations total reactivity OH radicals, kOH Beijing are presented. field campaign “Beijing winter finE particle STudy – Oxidation, Nucleation light Extinctions” (BEST-ONE) was conducted at the suburban site Huairou near from January to March 2016. It aimed understand oxidative capacity during elucidate secondary pollutants' formation...
In contrast to summer smog, the contribution of photochemistry formation winter haze in northern mid-to-high latitude is generally assumed be minor due reduced solar UV and water vapor concentrations. Our comprehensive observations atmospheric radicals relevant parameters during several events 2016 Beijing, however, reveal surprisingly high hydroxyl radical oxidation rates up 15 ppbv/h, which comparable values reported photochemical smog two three times larger than those determined previous...
Abstract Studies reporting the historical trends of SO 2 , NO x CO, and nonmethane volatile organic compounds emissions in China using unified approaches sources are limited. Here we established 66‐year emission these four species China. Six primary anthropogenic were included, made a series improvements to few existing inventories based on detailed statistical data, recently published factors, technology renewal reduce uncertainties. National 2015 27.1, 20.6, 188, 28.4 Mt, with annual...
Abstract. Nitro-aromatic compounds (NACs), as important contributors to the light absorption by brown carbon, have been widely observed in various ambient atmospheres; however, their formation urban atmosphere was little studied. In this work, we report an intensive field study of NACs summer 2016 at Beijing site, characterized both high-NOx and anthropogenic VOC dominated conditions. We investigated factors that influence NAC (e.g., NO2, precursors, RH photolysis) through quantification...
Abstract. Carbonyl compounds are important intermediates in atmospheric photochemistry. To explore the relative contributions of primary and secondary carbonyl sources, carbonyls other volatile organic (VOCs) were measured at an urban site both winter summer Beijing. The positive matrix factorization (PMF) model was used for source apportionment VOCs. As VOCs undergo photochemical processes atmosphere, such may interfere with factor identification, relationships between resolved PMF factors...
Abstract. We measured levels of ambient volatile organic compounds (VOCs) at seven sites in the Pearl River Delta (PRD) region China during Air Quality Monitoring Campaign spanning 4 October to 3 November 2004. Two sites, Guangzhou (GZ) and Xinken (XK), were intensive which we collected multiple daily canister samples. The observations reported here provide a look VOC distribution, speciation, photochemical implications PRD region. Alkanes constituted largest percentage (>40%) mixing...
Histone lysine specific demethylase 1 (LSD1) was reported to be overexpressed in several human cancers and recognized as a promising anticancer drug target. In the current study, we designed synthesized novel series of pyrimidine–thiourea hybrids evaluated their potential LSD1 inhibitory effect. One compounds, 6b, containing terminal alkyne appendage, shown most potent selective inhibitor vitro exhibited strong cytotoxicity against gastric cancer cells. Compound 6b also showed marked...
Abstract. Organosulfates (OSs) with ambiguous formation mechanisms are a potential source of missing secondary organic aerosol (SOA) in current atmospheric models. In this study, we chemically characterized OSs and nitrooxy-OSs (NOSs) formed under the influence biogenic emissions anthropogenic pollutants (e.g., NOx, SO42−) summer Beijing. An ultrahigh-resolution mass spectrometer equipped an electrospray ionization was applied to examine overall molecular composition S-containing organics....
Abstract. In 2014, a large, comprehensive field campaign was conducted in the densely populated North China Plain. The measurement site located botanic garden close to small town Wangdu, without major industry but influenced by regional transportation of air pollution. loss rate coefficient atmospheric hydroxyl radicals (OH) quantified direct measurements OH reactivity. Values ranged between 10 and 20 s−1 for most daytime. Highest values were reached late night with maximum around 40 s−1....
Naphthalene (Nap) and methylnaphthalene (MN) are the most abundant polycyclic aromatic hydrocarbons (PAHs) in atmosphere have been proposed to be important precursors of anthropogenic secondary organic aerosol (SOA) derived from laboratory chamber experiments. In this study, atmospheric Nap/MN their gas-phase photooxidation products were quantified by a Proton Transfer Reaction-Quadrupole interface Time-of-Flight Mass Spectrometer (PTR-QiTOF) during 2016 winter Beijing. Phthalic anhydride,...
Abstract. In the past decade, average PM2.5 concentrations decreased rapidly under strong pollution control measures in major cities China; however, ozone (O3) emerged as a significant problem. Here we examine unique (for China) 12-year data set of ground-level O3 and precursor collected at an urban site Beijing (PKUERS, campus Peking University), where maximum daily 8 h (MDA8) concentration daytime Ox (O3+NO2) August increased by 2.3±1.2 ppbv (+3.3±1.8 %) yr−1 1.4±0.6 (+1.9±0.8 yr−1,...
Nitrated phenols (NPs) are important atmospheric pollutants that affect air quality, radiation, and health. The recent development of the time-of-flight chemical ionization mass spectrometer (ToF-CIMS) allows quantitative online measurements NPs for a better understanding their sources environmental impacts. Herein, we deployed nitrate ions as reagent in ToF-CIMS quantified six classes gaseous Beijing. concentrations range 1 to 520 ng m-3. Nitrophenol (NPh) has greatest mean concentration....
Abstract. The first OH and HO2 radical observation in Yangtze River Delta, one of the four major urban agglomerations China, was carried out at a suburban site (Taizhou) summer 2018 from May to June, aiming elucidate atmospheric oxidation capacity this region. maximum diurnal averaged concentrations were 1.0×107 1.1×109 cm−3, respectively, which second highest HOx (sum HO2) observed China. HONO photolysis dominant primary source, accounting for 42 % total initiation rate. Other contributions...