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| http://dx.doi.org/10.1021/cr5006638 | DOI Listing |
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Atmospheric chemistry of trifluorodicarbonyls initiated by Cl atoms: Reactivity trends, mechanism, and acid formation yields.
J Environ Sci (China)
May 2025
Laboratorio Universitario de Química y Contaminación del Aire (L.U.Q.C.A), Instituto de Investigaciones en Fisicoquímica de Córdoba (I.N.F.I.Q.C.), Dpto. de Fisicoquímica. Facultad de Ciencias Químicas, Universidad Nacional de Córdoba. Ciudad Universitaria, 5000 Córdoba, Argentina. Electronic address:
Rate coefficients of the gas-phase reactions of Cl atoms with a series of fluorinated diketones (FDKs): CFC(O)CHC(O)CH (TFP), CFC(O)CHC(O)CHCH (TFH) and CFC(O)CHC(O)CH(CH) (TFMH), have been measured at (298 ± 2) K and under atmospheric pressure. The experiments were performed using the relative-rate method with a GC-FID detection system. From different determinations and references used, the following rate coefficients were obtained (in cm/(molecule·sec)): k(TFP + Cl) = (1.
View Article and Find Full Text PDFSignificant chlorine emissions from biomass burning affect the long-term atmospheric chemistry in Asia.
Natl Sci Rev
September 2024
Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China.
Article Synopsis
- Biomass burning (BB) produces harmful gases and particles that affect air quality and climate, but scientists haven't focused much on chlorine emissions from this process.
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Arctic halogens reduce ozone in the northern mid-latitudes.
Proc Natl Acad Sci U S A
September 2024
Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Blas Cabrera, Spanish National Research Council, Madrid 28006, Spain.
Article Synopsis
- * This reduction is due to the movement of ozone-poor and halogen-rich air from the Arctic, which impacts ozone levels further south by decreasing the overall tropospheric ozone column by around 4%.
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Near surface oxidation of elemental mercury leads to mercury exposure in the Arctic Ocean biota.
Nat Commun
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Division of Environmental Science and Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, 37673, Republic of Korea.
Atmospheric mercury (Hg(0), Hg(II)) and riverine exported Hg (Hg(II)) are proposed as important Hg sources to the Arctic Ocean. As plankton cannot passively uptake Hg(0), gaseous Hg(0) has to be oxidized to be bioavailable. Here, we measured Hg isotope ratios in zooplankton, Arctic cod, total gaseous Hg, sediment, seawater, and snowpack from the Bering Strait, the Chukchi Sea, and the Beaufort Sea.
View Article and Find Full Text PDFUnclassical Radical Generation Mechanisms in the Troposphere: A Review.
Environ Sci Technol
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State Key Joint Laboratory of Environmental Simulation and Pollution Control, State Environmental Protection Key Laboratory of Atmospheric Ozone Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100084, China.
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