A5001206093- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Toxic Organic Pollutants Impact
- Marine and coastal ecosystems
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Atmospheric and Environmental Gas Dynamics
- Water Quality Monitoring and Analysis
- Vehicle emissions and performance
- Water Quality and Pollution Assessment
- Thermochemical Biomass Conversion Processes
- Groundwater and Isotope Geochemistry
- Groundwater flow and contamination studies
- Hydrocarbon exploration and reservoir analysis
- Water Treatment and Disinfection
- Fluoride Effects and Removal
- Atmospheric aerosols and clouds
- Odor and Emission Control Technologies
- Arsenic contamination and mitigation
- Isotope Analysis in Ecology
- Pharmaceutical and Antibiotic Environmental Impacts
- Analytical chemistry methods development
- Indoor Air Quality and Microbial Exposure
- Mass Spectrometry Techniques and Applications
- Soil and Unsaturated Flow
Tianjin University of Science and Technology
2024
Tianjin University
2020-2023
University of Edinburgh
2022
Institute of Atmospheric Physics
2021
Chinese Academy of Sciences
2021
China University of Geosciences (Beijing)
2016-2017
Abstract Exploring the source, transformation pathways, and fate of natural organic matter (NOM) is critical to understanding regional/global carbon cycle budget. The dissolved fraction NOM, i.e., (DOM), a complex mixture resulting from plant, animal microbial plays crucial role in many biogeochemical processes at land-ocean-atmosphere interfaces. advance Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS) makes detailed characterization DOM molecular level possible. On...
Rapid warming in the Arctic has a huge impact on global environment. Atmospheric brown carbon (BrC) is one of least understood and uncertain agents due to scarcity observations. Here, we performed direct observations atmospheric BrC quantified its light-absorbing properties during 2-month circum-Arctic cruise summer 2017. Through observation-constrained modeling, show that BrC, mainly originated from biomass burning mid- high latitudes Northern Hemisphere (∼60%), can be strong agent region,...
Snow serves as a vital scavenging mechanism to gas-phase and particle-phase organic nitrogen substances in the atmosphere, providing significant link between land-atmosphere flux of surface-earth system. Here, we used optical instruments (UV–vis excitation-emission matrix fluorescence) Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS) elucidate molecular composition potential precursors snow samples collected simultaneously at four megacities North China. The elemental...
Abstract. Firework (FW) emission has strong impacts on air quality and public health. However, little is known about the molecular composition of FW-related airborne particulate matter (PM), especially organic fraction. Here we describe detailed Beijing PM collected before, during, after a FW event in evening New Year's Eve 2012. Subgroups CHO, CHON, CHOS were characterized using ultrahigh-resolution Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry. These subgroups...
Abstract Organosulfates (OSs), a key component of secondary organic aerosols (SOA), account for up to one third matter in the atmosphere. However, high molecular weight (HMW, 500–800 Da) OSs ambient are poorly characterized at level, due experimental difficulties. With Fourier transform‐ion cyclotron resonance mass spectrometry (FT‐ICRMS), we able identify more than 8,000 wintertime Beijing. We found that both number and signal magnitudes HMW with low H/C O/C ratios degrees unsaturation were...
Abstract Organic matter in the gas‐phase and particles are important components of atmosphere. Photochemical degradation is a major transformation pathway atmospheric organic matter, which changes atmospherically related life time environmental, climatic, health‐related effects as well biogeochemical cycles elements. In addition to field observations model simulations, laboratory experiments based on smog chambers flow tubes approaches study photodegradation mechanisms influencing factors...
The chemical composition of dissolved organic sulfur in snow is important understanding the sources and scavenging processes atmospheric matter. Snow samples collected simultaneously from four megacities North China were analyzed using ultra-high-resolution Fourier transform ion cyclotron resonance mass spectrometry. modified oxygen redefined aromaticity index help interpretation possible structural information evaluation sulfur-containing molecules. By extending these parameters, we provide...
Organic nitrogen (ON) is an important participant in the Earth's N cycle. Previous studies have shown that penguin feces add abundance of nutrients including to soil, significantly changing eco-environment ice-free areas Antarctica. To explore molecular transformation ON guano-affected we collected guano-free weathered modern soil from colonies, ancient abandoned and Ross Sea region, Antarctica, Fourier transform ion cyclotron mass spectrometry (FT-ICR MS) was used investigate chemical...
Our study provides unique information on the vertical profiles and size distribution of urban organic aerosols by FT-ICR MS.
Abstract. Little is known about the formation processes of nitrooxy organosulfates (OSs) by nighttime chemistry. Here we characterize OSs at a molecular level in firework-related aerosols urban Beijing during Chinese New Year. High-molecular-weight with relatively low H / C and O ratios high unsaturation are potentially aromatic-like OSs. They considerably increased Year's Eve, affected firework emissions. We find that large quantities carboxylic-rich alicyclic molecules possibly formed...
Abstract. Secondary organic aerosol (SOA) plays a significant role in atmospheric chemistry. However, little is known about the vertical profiles of SOA urban boundary layer (UBL). This knowledge gap constrains simulation chemical transport models. Here, samples were synchronously collected at 8, 120, and 260 m based on 325 meteorological tower Beijing from 15 August to 10 September 2015. Strict emission controls implemented during this period for 2015 China Victory Day parade. we observed...
Organosulfates (OSs) are some of the important components secondary organic aerosols in ambient air. However, little is known about stable carbon and sulfur isotopic compositions OSs. Here, we identified pair 12Cn/13C12Cn–1 32Sn/34S32Sn–1 formulas urban using ultra-high-resolution Fourier transform ion cyclotron resonance mass spectrometry. Family series 694–1649 13C32S OSs 40–144 12C34S with completely coherent chains were detected, accounting for 37–52% 2.2–4.5%, respectively, observed...
Abstract. Firework (FW) emission has strong impacts on air quality and public health. However, little is known about the molecular composition of FW-related airborne particulate matter (PM) especially organic fraction. Here we describe detailed Beijing PM collected before, during, after a FW event in New Year's Eve evening 2012. Subgroups CHO, CHNO, CHOS were characterized using ultrahigh resolution Fourier transform-ion cyclotron resonance (FT-ICR) mass spectrometry. These subgroups...
In this study, a 3D variable-density groundwater flow and salt transport model was developed calibrated to simulate spatial temporal variation of salinity in Binhai New Area located at coastal Tianjin Municipality for tracking saltwater/freshwater interface depth, analyzing saltwater descending velocity, determining downward intrusion ceasing time under the background rigorous pumping regulations (groundwater rate reducing zero 2023). Results indicated that: (1) depths northern area would...
<title>Abstract</title> Iodine is one of the essential trace elements in human body, and excessive or insufficient intake will affect health. To ensure safety drinking water resources, spatial distribution iodine content migration enrichment factors shallow underground salty Tianjin coastal area were studied. The results show that iodide groundwater ranges from ND to 1320 μg/L, high (100-300 μg/L) ultra-high (>300 account for 37.5%, distributed east, west, central south study area;...
Abstract. Secondary organic aerosols (SOA) play a significant role in atmospheric chemistry. However, little is known about the vertical profiles of SOA urban boundary layer (UBL). This gap knowledge constrains simulation chemical transport models. Here, we synchronously collected aerosol samples at 8 m, 120 m and 260 based on 325-m meteorological tower Beijing from August 15th to September 10th, 2015. Strict emission controls were implemented during this period for 2015 China Victory Day...