Atomically dispersed ternary FeCoNb active sites anchored on N-doped honeycomb-like mesoporous carbon for highly catalytic degradation of 4-nitrophenol

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 677, С. 718 - 728

Опубликована: Авг. 5, 2024

Язык: Английский

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Molecular-level insights into the temperature-dependent formation dynamics and mechanism of water-soluble dissolved organic carbon derived from biomass pyrolysis smoke

Water Research, Год журнала: 2024, Номер 252, С. 121176 - 121176

Опубликована: Янв. 21, 2024

Язык: Английский

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Characterization of atmospheric water-soluble brown carbon in the Athabasca oil sands region, Canada

Atmospheric chemistry and physics, Год журнала: 2025, Номер 25(4), С. 2423 - 2442

Опубликована: Фев. 25, 2025

Abstract. Extensive industrial operations in the Athabasca oil sands region (AOSR) (Alberta, Canada) are a suspected source of water-soluble brown carbon (WS-BrC), class light-absorbing organic aerosols capable altering atmospheric solar-radiation budgets. However, current understanding WS-BrC across AOSR is limited, and primary regional sources these unknown. During summer 2021, active filter-pack samplers were deployed at five sites to collect total suspended particulate matter for purpose evaluating WS-BrC. Ultraviolet–visible spectroscopy fluorescence excitation–emission matrix (EEM) spectroscopy, complemented by parallel factor analysis (PARAFAC) modelling, employed sample characterization. Aerosol absorbance was comparable between near-industry remote field sites, suggesting that exerted limited influence on radiative forcing. The combined EEM–PARAFAC method identified three fluorescent components (fluorophores), including one humic-like substance (C1) two protein-like substances (C2 C3). Sites near facilities exposures receiving transport from local industry (as indicated back-trajectory analysis) displayed increased C1 C3 fluorescence; moreover, both fluorophores positively correlated with elements (i.e. vanadium sulfur) gaseous pollutants nitrogen dioxide reduced sulfur), indicative emissions. C2 fluorophore exhibited high emission intensity near-field during severe wildfire smoke events, while positive correlations indicator variables suggest likely reflected wildfire-generated anthropogenic These results demonstrate an accessible cost-effective tool can be applied monitor AOSR.

Язык: Английский

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Variations in optical properties of water- and methanol-soluble organic carbon in PM2.5 in Tianjin and Handan over the Wintertime of 2018–2020

Atmospheric Research, Год журнала: 2024, Номер 303, С. 107332 - 107332

Опубликована: Март 11, 2024

Язык: Английский

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Insight into the abundance and optical characteristics of water-soluble organic compounds (WSOC) in PM2.5 in urban areas

Chemosphere, Год журнала: 2025, Номер 372, С. 144103 - 144103

Опубликована: Янв. 17, 2025

Язык: Английский

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Atmospheric deposition of chromophoric dissolved organic matter in the Athabasca Oil Sands Region, Canada, is strongly influenced by industrial sources during the winter months

Environmental Pollution, Год журнала: 2025, Номер 371, С. 125936 - 125936

Опубликована: Фев. 26, 2025

Язык: Английский

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Quantification and molecular characterization of dissolved organic carbon released from leaf fragments, crop straw, and straw biochar

Journal of Environmental Sciences, Год журнала: 2025, Номер unknown

Опубликована: Март 1, 2025

Язык: Английский

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Measurement report: Optical and structural properties of atmospheric water-soluble organic carbon in China – insights from multi-site spectroscopic measurements

Atmospheric chemistry and physics, Год журнала: 2025, Номер 25(6), С. 3647 - 3667

Опубликована: Март 27, 2025

Abstract. To understand the spatial variation of optical and structural properties water-soluble brown carbon its influencing factors in China, light absorption, fluorescence, Fourier transform infrared (FTIR) spectrum organic (WSOC) different regions China are measured following same analytical methods. The average absorption coefficients mass efficiencies WSOC at 365 nm (Abs365 MAE365) rank from high to low as northwest > southwest north east regional site, with higher values northern than southern sites inland areas coastal areas. resolved by spectra-based positive matrix factorization model abundance aromatic O−H C=C functional groups determined FTIR both indicate that compounds significant light-absorbing substances have a impact on fluorophores. Multiple linear regression analysis shows fluorophores identified fluorescence spectra combined parallel factor (PARAFAC) contribute about 62 %–93 % all sites, which humic-like substance (HULIS) contributes most, especially highly oxygenated HULIS (29 %–50 %) long emission wavelengths. Combustion source emissions atmospheric chemical processes impacts some sites. Moreover, relative humidity (RH) can also affect MAE365 WSOC, decreasing increase RH when RH<60 remaining relatively unchanged RH>60 %. Taken together, this study promotes better understanding heterogeneity their China.

Язык: Английский

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Characterizing optical properties of HULIS versus WSOC in cloud water of Eastern China - Insights into secondary formation in cloud processes

Atmospheric Research, Год журнала: 2025, Номер unknown, С. 108091 - 108091

Опубликована: Март 1, 2025

Язык: Английский

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Ceramsite Catalyst Derived from Printed Circuit Board Sludge for Catalytic Ozonation Treatment of Coking Wastewater: Performance and Mechanism

Опубликована: Янв. 1, 2025

Язык: Английский

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