Yukun Fan

ORCID: 0000-0003-0074-7190
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About
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Research Areas
  • Radioactive contamination and transfer
  • Radioactivity and Radon Measurements
  • Geology and Paleoclimatology Research
  • Isotope Analysis in Ecology
  • Atmospheric and Environmental Gas Dynamics
  • Methane Hydrates and Related Phenomena
  • Nuclear Physics and Applications
  • Radioactive element chemistry and processing
  • Groundwater and Isotope Geochemistry
  • Power Systems and Technologies
  • Arctic and Antarctic ice dynamics
  • Nuclear and radioactivity studies
  • Job Satisfaction and Organizational Behavior
  • Rocket and propulsion systems research
  • Integrated Energy Systems Optimization
  • Cutaneous Melanoma Detection and Management
  • Phase Equilibria and Thermodynamics
  • Electrocatalysts for Energy Conversion
  • Plant Diversity and Evolution
  • Landslides and related hazards
  • Combustion and flame dynamics
  • Advanced Combustion Engine Technologies
  • Advanced Decision-Making Techniques
  • Radiation Detection and Scintillator Technologies
  • Hydrocarbon exploration and reservoir analysis

Institute of Earth Environment
2014-2025

Chinese Academy of Sciences
2013-2025

State Key Laboratory of Loess and Quaternary Geology
2014-2024

Chongqing Medical University
2023-2024

NARI Group (China)
2022-2024

Binzhou University
2023-2024

Shandong University
2024

Henan University of Technology
2022-2023

Chongqing University of Science and Technology
2023

Xishuangbanna Tropical Botanical Garden
2020-2021

The Fukushima nuclear accident in March 2011 has released a large amount of radioactive pollutants to the environment. Of pollutants, iodine-129 is long-lived radionuclide and will remain environment for millions years. This work first report levels inorganic speciation (129)I seawater depth profiles collected offshore June 2011. Significantly elevated concentrations surface water were observed with highest (129)I/(127)I atomic ratio 2.2 × 10(-9) 40 km Fukushima. Iodide was found as dominant...

10.1021/es304460k article EN Environmental Science & Technology 2013-03-05

Microplastics (MPs) are emerging pollutants, and limited research has focused on their exposure to terrestrial wildlife transport mode the remote Tibetan Plateau (TP). Therefore, we investigated MPs in southern soil feces of Equus kiang (Tibetan wild ass), a species peculiar TP, which is known as "third pole." We found that MP median abundances were 102 4.01 particles/g dry soil, respectively. In both media, morphology mainly comprised ∼50 μm slender fibrous particles. total, 29 types...

10.1021/acs.est.3c00582 article EN Environmental Science & Technology 2023-06-22

Separation of carrier free iodine from low level samples and accurate measurement ultralow (129)I in micrograms target are essential but a bottleneck geological dating terrestrial system tracer research using naturally produced (129)I. In this work, we present method coprecipitation AgI with AgCl for preparing target, associated combustion tube furnace separating solid anion exchange chromatography preconcentrating large volume water. An accelerator mass spectrometry was used to measure...

10.1021/ac101558k article EN Analytical Chemistry 2010-08-24

10.1016/j.jenvrad.2016.01.008 article EN publisher-specific-oa Journal of Environmental Radioactivity 2016-01-25

As the number of coastal nuclear facilities rapidly increases and wastewater from Fukushima Nuclear Plant has been discharged into Pacific Ocean, environmental safety China's marginal seas is gaining increased attention along with heightened potential risk accidents. However, insufficient work limits our understanding impact human activities on Yellow Sea (YS) assessment their process. This study first reports

10.1021/acs.est.4c02123 article EN Environmental Science & Technology 2024-07-03

Although oxygen reduction reaction (ORR) plays a key role in the cathodic part of many emerging energy conversion devices, it has naturally suffered from sluggish kinetics and high overpotential. We here report facile synthesis Fe-N co-doped carbon with hierarchical porosity in-situ formed graphene biomass tar using urea as nitrogen dopant, FeCl3 porogen, catalyst, Fe dopant. This exhibited an ORR catalytic activity comparable to that Pt/C catalyst relation its onset potential, limited...

10.1016/j.elecom.2019.01.021 article EN cc-by-nc-nd Electrochemistry Communications 2019-01-27

As a notorious hazardous waste, biomass tar has for long time been recognized as one of the key challenges throughout progress in gasification renewable energy and chemical purposes. In this contribution, we report that featured with considerably high carbon nitrogen contents could serve an ideal source production nitrogen-doped highly ultramicroporous following facile activation approach, which enabled remarkably ultramicroporosity based on direct bottom-up strategy. Further, disclosed...

10.1021/acs.energyfuels.9b01638 article EN Energy & Fuels 2019-08-19

In this contribution, biochar from municipal sludge was used as a novel matrix for the synthesis of series calcium-based heterogeneous catalysts toward biodiesel production. Their catalytic activity investigated in terms catalyst loading and calcination temperature during preparation, addition to transesterification parameters including methanol/oil molar ratio, reaction time, amount. The highest yield up 93.77% achieved with 30Ca/A-SBC-700, it maintained high 84.9% even after 10 cycles...

10.1021/acsomega.0c01970 article EN publisher-specific-oa ACS Omega 2020-07-06

Abstract The long half‐life of 129 I makes it useful for dating marine sediments aged 2–90 Ma. However, the lack initial value hinders its application terrestrial sediments. A large scatter I/ 127 in prenuclear samples has been reported; however, key influencing factors remain unclear. This study presented iodine isotope data from three Argentine Entisol profiles and developed an iodine‐source model to determine influence source on isotopic composition. temporal patterns demonstrated clear...

10.1029/2023gl107811 article EN cc-by-nc-nd Geophysical Research Letters 2024-02-15

Antibiotics are widely applied in management of acne vulgaris, which raises the issue antibiotic resistance. Due to improper application and supervision antibiotics, resistance has become a serious problem China. So, efficacy antimicrobial therapy is unclear without an objective monitor Propionibacterium acnes. This cross-sectional, multicenter observational study aimed at understanding status P. acnes, investigating measures China analyzing genotypes antibiotic-resistant strains Altogether,...

10.1111/1346-8138.13149 article EN The Journal of Dermatology 2015-10-28

Iodine is a crucial nutrient for public health, and its presence in the terrestrial atmosphere key factor determining prevalence of iodine deficiency disorders. While oceanic emissions decrease at lower sea surface temperatures, primary contributors to atmospheric can vary from sources summer other winter. However, specific their respective contributions have remained unexplored. Fortunately, atomic ratio 129I 127I significantly differs between nuclear activity fossil fuels like coal...

10.1021/acs.est.3c05075 article EN Environmental Science & Technology 2023-10-31

A rapid and simple method was developed for speciation analysis of 129I in seawater by selective coprecipitation carrier-free iodide accelerator mass spectrometry (AMS) measurement 129I. Iodide separated from other species iodine AgI with Ag2SO3, AgCl, AgBr addition only 100 mg/L Ag+ 0.3 mmol/L NaHSO3 at pH 4.2–5.5. The separation efficiency more than 95%, crossover between 129IO3– 129I– fractions is less 3%. Iodate total inorganic were converted to use 1–2 then the same as iodide. Ag2SO3...

10.1021/ac400060q article EN Analytical Chemistry 2013-03-08

Hindrance stress is a stimulus factor in the workplace that has certain impact on innovative behavior of employees. Most existing studies focus analysis individual-level factors, ignoring important role organizational-level factors. This study uses multiple linear models to empirically analyze interaction mechanisms among hindrance stress, proactive personality, employment relationship atmosphere, and employee factors workplace. found following: (1) negatively affects employees' behavior....

10.3389/fpsyg.2022.969013 article EN cc-by Frontiers in Psychology 2022-10-11
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