A5064092325- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Air Quality and Health Impacts
- Atmospheric and Environmental Gas Dynamics
- Geological and Geochemical Analysis
- Atmospheric aerosols and clouds
- Toxic Organic Pollutants Impact
- Geochemistry and Geologic Mapping
- Isotope Analysis in Ecology
- Geology and Paleoclimatology Research
- Marine and coastal ecosystems
- Radioactivity and Radon Measurements
- Metal Extraction and Bioleaching
- High-pressure geophysics and materials
- earthquake and tectonic studies
- Archaeology and ancient environmental studies
- Geochemistry and Elemental Analysis
- Arsenic contamination and mitigation
- Mine drainage and remediation techniques
- Marine Biology and Ecology Research
- Iron oxide chemistry and applications
- Particle Accelerators and Free-Electron Lasers
- Mineral Processing and Grinding
- Heavy metals in environment
- Radioactive contamination and transfer
Chinese Academy of Sciences
2015-2025
Guangzhou Institute of Geochemistry
2015-2025
University of Hong Kong
2012-2013
Significance After the Apollo and Luna missions, which were flown about 40 years ago, Moon was explored only from orbit. In addition, no samples returned young high-FeO TiO 2 mare basalt in northern Imbrium basin. Such are important to understand formation evolution of Procellarum KREEP [potassium (K), rare earth elements (REE), phosphorus (P)] terrain, a key terrain highly enriched radioactive nuclides. The Chang’e-3 mission carried out first situ analyses chemical mineral compositions...
Incomplete understanding of the sources secondary organic aerosol (SOA) leads to large uncertainty in both air quality management and climate change assessment. Chemical reactions occurring atmospheric aqueous phase represent an important source SOA mass, yet, effects anthropogenic emissions on (aqSOA) are not well constrained. Here we use compound-specific dual-carbon isotopic fingerprints (δ13C Δ14C) dominant aqSOA molecules, such as oxalic acid, track precursor formation mechanisms aqSOA....
Abstract Water‐soluble organic carbon (WSOC) makes up a large fraction of carbon, which has attracted considerable attention due to its light absorption properties and effects on human health. However, the poorly constrained sources WSOC give rise uncertainties in climate health, especially regions with high pollutant loading. Here, we investigated 10 cities across China by dual isotope analysis UV−visible spectrophotometry, respectively. Despite dominant contribution nonfossil sources,...
Abstract The isotope tracer technique plays a key role in identifying the sources and atmospheric processes affecting pollution. of brown carbon (BrC) at Guangzhou during 2017–2018 were characterized by positive matrix factorization with radiocarbon constraints multiple linear regression analysis. primary emission factors fossil fuel combustion (FF) biomass burning (BB) accounted for 34% 27% dissolved BrC absorption λ = 365 nm (Abs ), respectively. total mean light contributed secondary was...
Abstract Beyond its economic value, copper (Cu) serves as a valuable tracer of deep magmatic processes due to close relationship with sulfide evolution and sensitivity oxygen fugacity (fO 2 ). However, determining Cu’s oxidation state (+ 1 or + 2) in silicate melts, crucial for interpreting behavior reconstructing fO the Earth’s interior, has long been challenge. This study utilizes X-ray Absorption Near Edge Structure spectroscopy investigate Cu hydrous mafic melts equilibrated under...
Abstract Black carbon (BC) is considered as an important contributor to the Himalayan glaciers melt in past few decades. However, long‐term source apportionment of BC remains unclear. Here we present first radiocarbon ( 14 C)‐based annual variation ice core spanning period 1959–2012 drilled from Southeastern Tibetan Plateau, a receptor site South Asia outflow. We find fossil fuel combustion major contribution (73% ± 5%), yet biomass burning fraction ƒ ) has grown 24% 4% 30% since 1990....
Naphthalene (NAP), as a surrogate of intermediate-volatility organic compounds (IVOCs), has been proposed to be an important precursor secondary aerosol (SOA). However, the relative contribution its emission sources is still not explicit. This study firstly conducted source apportionment atmospheric NAP using triple-isotope (δ13C, δ2H, and Δ14C) technique combined with Bayesian model in Beijing–Tianjin–Hebei (BTH) region China. At urban sites, stable carbon (−27.7 ± 0.7‰, δ13C) radiocarbon...
Aerosol black carbon (BC) is a short-lived climate pollutant. The poorly constrained provenance of tropical marine aerosol BC hinders the mechanistic understanding extreme events and oceanic cycling. Here, we collected PM2.5 samples during research cruise NORC2016-10 through South China Sea (SCS) Northeast Indian Ocean (NEIO) measured dual-carbon isotope compositions (δ13C-Δ14C) using hydrogen pyrolysis technique. exhibits six different δ13C-Δ14C isotopic spaces (i.e., provinces). Liquid...
Abstract Humic‐like substances (HULIS) are significant contributor to the light absorption of water‐soluble brown carbon (WSBrC), which contains certain strong light‐absorbing chemical components that not well understood, impeding assessment WSBrC's climate impact. China as hotspot regions with high loading WSBrC characterized by capacity, here, we investigated sources and atmospheric processes (δ 13 C–Δ 14 C), molecular composition (Fourier transform ion cyclotron resonance mass...
Abstract The food source of hadal endemic fauna provides an insight into the carbon cycle in trenches and a biological adaptation to impoverished harsh trench environment. Here, we present first Δ 14 C results amphipods from three Pacific define organic matter these remote ecosystems. Amphipod muscle tissues contain bomb signature (Δ 10 ± 2‰ 65 2‰), thereby revealing dietary preference for labile fresh derived surface water. Thus, deepest ocean has tight linkage with via chain. dating result...
Abstract. China experiences frequent and severe haze outbreaks from the beginning of winter. Carbonaceous aerosols are regarded as an essential factor in controlling formation evolution episodes. To elucidate carbon sources air pollution, source apportionment was conducted using radiocarbon (14C) unique molecular organic tracers. Daily 24 h PM2. 5 samples were collected continuously October 2013 to November 10 Chinese cities. The 14C results indicated that non-fossil-fuel (NF) emissions...
Abstract Hydrothermal experiments were performed at 311°C and 3.0 kbar on natural olivine peridotite to investigate the kinetics of serpentinization. The results show that rates reaction strongly depend grain sizes solid reactants, with smaller resulting in faster kinetics. After 27 days reaction, extent was 99% for <30 μm, 28% 100–177 μm. Compared peridotite, is serpentinized much slower rates, e.g., 5.3% achieved μm after days, approximately five times lower than reached during Such...
Abstract. Secondary organic aerosols (SOAs) are important components of fine particulates in the atmosphere. However, sources SOA precursor and atmospheric processes affecting SOAs poorly understood. This limits our abilities to improve air quality model aerosol-mediated climate forcing. Here, we use novel compound-specific dual-carbon isotope fingerprints (Δ14C δ13C) for individual tracer molecules (i.e., oxalic acid) investigate fates atmosphere at five emission hotspots China. Coal...
Low molecular weight dicarboxylic acids constitute a large fraction of atmospheric organic aerosols, which impact radiative forcing and hence Earth's climate. Radiocarbon (14C) is unique approach to unambiguously distinguishing the relative contributions biomass-derived fossil sources. Here, we developed compound-specific radiocarbon analysis (CSRA) method for individual in particulates. Specifically, starts with dibutyl ester derivatization technique, followed by separation harvesting...
Biomass burning (BB) in South Asia severely deteriorates air quality and poses great harm to public health. There is an ongoing debate on whether this BB plume can cross the Himalaya mountains affect Tibetan Plateau air. This study designed a field sampling campaign unravel question. Surface snow samples urban mountain sites were collected winter when masses mainly passing through northern Asia. No difference was observed for concentration level optical property of dissolved organic carbon...
The black shale in the Lower Cambrian Niutitang Formation, southwest China, which has been dated to 532.3 ± 0.7 Ma by U-Pb radiometric measurements, hosts a sedimentary layer with abnormally high Ni-Mo-PGE-Au contents. This is enriched Ni (up 3.8 wt %), Mo 7.7 and U 595 ppm), but its genesis still controversial. Here we report first direct observation of uranium-bearing minerals their radioactive effects on surrounding matter polymetallic sulfide ore. X-ray absorption fine structure analyses...