A5101728695- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Groundwater and Isotope Geochemistry
- Hydrology and Watershed Management Studies
- Chemical and Physical Properties in Aqueous Solutions
- Geological formations and processes
- Plant Water Relations and Carbon Dynamics
- Tree-ring climate responses
- Pleistocene-Era Hominins and Archaeology
- Archaeology and ancient environmental studies
- Cryospheric studies and observations
- Crystallization and Solubility Studies
- Geochemistry and Geologic Mapping
- Ionic liquids properties and applications
- Soil and Water Nutrient Dynamics
- Flood Risk Assessment and Management
- Metabolomics and Mass Spectrometry Studies
- Thermodynamic properties of mixtures
- Radioactive contamination and transfer
- Toxic Organic Pollutants Impact
- Mollusks and Parasites Studies
- Coastal wetland ecosystem dynamics
- Analytical chemistry methods development
- Thallium and Germanium Studies
- Radioactive element chemistry and processing
Institute of Earth Environment
2016-2025
Chinese Academy of Sciences
2016-2025
China XD Group (China)
2019
Chengdu University
2015
Chengdu Organic Chemicals (China)
2015
Shanghai Institute of Organic Chemistry
2014
Institute of Geochemistry
1999-2007
Sihailongwan Maar Lake, located in Northeast China, is a candidate Global boundary Stratotype Section and Point (GSSP) for demarcation of the Anthropocene. The lake’s varved sediments are formed by alternating allogenic atmospheric inputs authigenic lake processes store record environmental human impacts at continental-global scale. Varve counting radiometric dating provided precise annual-resolution sediment chronology site. Time series records radioactive ( 239,240 Pu, 129 I soot 14 C),...
Branched glycerol dialkyl tetraethers (brGDGTs) are emerging as a powerful tool for quantifying past terrestrial temperature variations. In lake sediments, mixed lacustrine vs. soil sources of brGDGTs pose challenge to quantitative application this paleothermometer, and effect has not yet been well-constrained. work, we analyzed concentrations distributions along with two other types typical lipid biomarkers (isoGDGTs long-chain n-alkanes) in modern sediments catchment soils from 26 park...
This paper reports a modified digestion method for the determination of platinum group elements (PGEs) in geological samples. Samples are first digested by HF custom made 120 ml PTFE beaker on hot plate to remove silicates. The dried residue is then with + HNO3 at 190 °C about 48 h after sealed stainless steel pressure bomb. Although only used sample relatively low temperature, ultramafic rocks refractory minerals can be effectively decomposed this method. Analytical results CCRMP (CANMET,...
Abstract A comprehensive understanding of the processes and mechanisms driving Holocene temperature changes is crucial for resolving ongoing controversy. Here, we reconstructed land surface (LST) variations over past 27,000 years in two loess‐paleosol profiles from Chinese Loess Plateau based on soil bacterial lipid signatures. By combining our data with other published records derived same proxy, identify notable spatial inconsistencies LST trends across geographically proximate areas...
Abstract Record of long‐term land temperature changes remains ephemeral, discontinuous, and isolated, thus leaving the common view that Pleistocene evolution should have followed ocean temperatures unconfirmed. Here, we present a continuous surface reconstruction in Asian monsoon region over past 3.0 Myr based on distribution soil bacterial lipids from Chinese Loess Plateau. The record indicates an unexpected warming trend Pleistocene, which is opposite to cooling temperatures, resulting...
Aliphatic polycarbonates with <italic>M</italic><sub>w</sub> greater than 100 000 g mol<sup>−1</sup> satisfactory yield can be synthesized by one-pot melt transesterification of diphenyl carbonate aliphatic diols at equimolar amounts using Zn(OAc)<sub>2</sub> as a catalyst.
Abstract The Chinese loess-paleosol sequences provide important archives for studying paleoenvironmental changes. However, the lack of independent and accurate time scales hinders study between loess other records. Asian stalagmite δ18O records indicate synchronous patterns paleoprecipitation over large geographic regions. record hydrogen isotopic composition plant wax (δDwax) in is also controlled by rainwater δD. Both share a common origin. linear relationship rainfall δD variance provides...
Bacterial branched glycerol dialkyl tetraethers (brGDGTs) are emerging as one of the most promising tools for quantifying past temperatures across a large variety continental settings. However, temperature-independent parameters such ratio 6-methyl vs. 5-methyl brGDGTs and bacterial community composition, might contribute to high uncertainty brGDGT paleothermometer. In this work, we investigated distributions in surface soils surrounding Lake Qinghai, reanalyzed previously published data....
The human society is facing growing flood risks due to the rapidly-changing global climate. Understanding how early coped with flooding will shed light on increase of contemporary social resilience projected intensified extreme climate change. However, assessment such ancient response hydrological changes remains difficult paucity records for risk coupled activities. Here, we present a two-millennium continuous reconstruction water level Poyang Lake, China's largest freshwater body, using...
The emission of platinum group elements (PGE) from automobile catalytic converters has led to enrichment PGE in road dusts and roadside soils urban areas that are well above the natural background levels. This paper evaluates source contamination all Au Pearl River Delta region, including three major cities, Shenzhen, Guangzhou Hong Kong, South China. Samples were digested using Carius tube analyzed by isotope dilution ICP-MS; Os was separated distillation other Te-coprecipitation. All...
Atrazine (ATR) is a widely used herbicide. There are several types of reactions in its metabolism. Herein, the mechanism three paths hydrolysis metabolism and predictions toxicities metabolites will be presented. The calculation results by B3LYP (Becke, 3-parameter, Lee-Yang-Parr), one approaches density functional theory, indicated that (1) there were models ATR. dissociation mechanisms C(9/11)-N(8/10), C(4/6)-N(8/10), C-Cl dealkylation, deamination, Cl substitution, respectively. (2)...
In this article, the equilibrium behavior of solutions 1-ethyl-3-methylimidazolium dimethyl phosphate ([Emim]DMP) and ethyl acetate or acetone in aqueous two-phase system (ATPS) was discussed to understand liquid–liquid (LLE) these organic solvents. Thus, we determined phase diagrams LLE data at 303.15, 308.15, 313.15, 323.15 K for investigated biphasic systems. Four empirical equations were used study tie lines. The results showed that [Emim]DMP + water systems within temperature range,...
Phase diagrams of aqueous two-phase systems composed N-butylpyridinium nitrate + salt (ammonium sulfate and sodium sulfate) water determined at (298.15, 308.15, 318.15 328.15) K. The binodal curves were associated with the Merchuk expression another two empirical expressions. influences temperature type cations also studied, which demonstrated that lower led to expansion region, whereas salting-out abilities Na2SO4 exceeded (NH4)2SO4, was proven by Gibbs free energy hydration ions.