Synergistic Effect of Reactive Oxygen Species in Photothermocatalytic Removal of VOCs from Cooking Oil Fumes over Pt/CeO₂/TiO₂

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(23), P. 17341 - 17351

Published: Nov. 22, 2022

The volatile organic compounds (VOCs) from cooking oil fumes are very complex and do harm to humans the environment. Herein, we develop high-efficiency energy-saving synergistic photothermocatalytic oxidation approach eliminate mixture of heptane hexanal, representative VOCs with high concentrations in fumes. Pt/CeO2/TiO2 catalyst nanosized Pt particles was prepared by simple hydrothermal impregnation methods, physicochemical properties were measured using numerous techniques. eliminated VOC at low light intensity (100 mW cm–2) temperature (200 °C). In addition, it showed 25 h catalytic stability water resistance (water concentration up 20 vol %) 140 or 190 °C. It is concluded that O2 picked electrons generate •O2– species, which transformed O22– O– species after rise temperature. presence water, •OH induced irradiation on surface •OOH formed via thermal reaction both supplementary oxygen for oxidation. interaction photo- thermocatalysis generated reactive species.

Language: Английский

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Non-target scanning of organics from cooking emissions using comprehensive two-dimensional gas chromatography-mass spectrometer (GC×GC-MS)

Applied Geochemistry, Journal Year: 2023, Volume and Issue: 151, P. 105601 - 105601

Published: Feb. 16, 2023

Language: Английский

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Foods and Contaminants Analysis Using Multidimensional Gas Chromatography: An Update of Recent Studies, Technology, and Applications

Analytical Chemistry, Journal Year: 2023, Volume and Issue: 95(1), P. 238 - 263

Published: Jan. 10, 2023

ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTFoods and Contaminants Analysis Using Multidimensional Gas Chromatography: An Update of Recent Studies, Technology, ApplicationsYada NolvachaiYada NolvachaiAustralian Centre for Research on Separation Science, School Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, AustraliaMore by Yada NolvachaiView Biographyhttps://orcid.org/0000-0002-8436-1836, Michelle S. AmaralMichelle AmaralAustralian AmaralView Biography, Philip J. Marriott*Philip MarriottAustralian Australia*E-mail: [email protected]. Phone: +61-(3)-99059630. Fax: +61-(3)-99054597.More MarriottView Biographyhttps://orcid.org/0000-0001-5180-1041Cite this: Anal. Chem. 2023, 95, 1, 238–263Publication Date (Web):January 10, 2023Publication History Published online10 January 2023Published inissue 10 2023https://pubs.acs.org/doi/10.1021/acs.analchem.2c04680https://doi.org/10.1021/acs.analchem.2c04680review-articleACS PublicationsCopyright © 2023 American Chemical SocietyRequest reuse permissionsArticle Views1685Altmetric-Citations1LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum full text article downloads since November 2008 (both PDF HTML) across all institutions individuals. These metrics regularly updated to reflect usage leading up last few days.Citations number other articles citing this article, calculated Crossref daily. Find more information about citation counts.The Altmetric Attention Score is a quantitative measure attention that research has received online. Clicking donut icon will load page at altmetric.com with additional details score social media presence given article. how calculated. Share Add toView InAdd Full Text ReferenceAdd Description ExportRISCitationCitation abstractCitation referencesMore Options onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Chromatography,Food,Food analysis,Modulators,Volatile organic compounds Get e-Alerts

Language: Английский

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Higher Toxicity of Gaseous Organics Relative to Particulate Matters Emitted from Typical Cooking Processes

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(44), P. 17022 - 17031

Published: Oct. 24, 2023

Cooking emission is known to be a significant anthropogenic source of air pollution in urban areas, but its toxicities are still unclear. This study addressed the fine particulate matter (PM2.5) and gaseous organics by combining chemical fingerprinting analysis with cellular assessments. The cytotoxicity reactive oxygen species activity were ∼1.9 ∼8.3 times higher than those PM2.5, respectively. Moreover, these values per unit mass PM2.5 ∼7.1 ∼15.7 collected from ambient Shanghai. total oleic acid equivalent quantities for carcinogenic toxic respiratory effects organics, as estimated using predictive models based on quantitative structure-property relationships, 1686 ± 803 430 176 μg/mg Both predicted consistent assessment. These health risks primarily attributed high relative content equivalency factor organic compounds present gas phase, including 7,9-di-tert-butyl-1-oxaspiro(4,5)deca-6,9-diene-2,8-dione, 2-ethylhexanoic acid, 2-phenoxyethoxybenzene. Furthermore, fatty acids identified prominent markers cooking-related emissions. obtained results highlight importance control measures cooking-emitted reduce personal exposure risks.

Language: Английский

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Measurements of volatile organic compounds in ambient air by gas-chromatography and real-time Vocus PTR-TOF-MS: calibrations, instrument background corrections, and introducing a PTR Data Toolkit

Atmospheric measurement techniques, Journal Year: 2023, Volume and Issue: 16(21), P. 5261 - 5285

Published: Nov. 8, 2023

Abstract. Volatile organic compound (VOC) emissions and subsequent oxidation contribute to the formation of secondary pollutants poor air quality in general. As more VOCs at lower mixing ratios have become target investigations, their quantification has been aided by technological advancements proton-transfer-reaction time-of-flight mass spectrometry (PTR-TOF-MS). However, such requires appropriate instrument background measurements calibrations, particularly for without calibration standards. This study utilized a Vocus PTR-TOF-MS coupled with gas chromatograph real-time speciated ambient Boulder, Colorado, during spring 2021. The aim these was understand characterize response temporal variability as inform broader range detected VOCs. Fast, frequent calibrations were made every 2 h addition daily multipoint calibrations. Sensitivities derived from fast 5 ± 6 % (average 1 standard deviation) than those due an offset between measurement. caused, part, incomplete diluent. These used place normalization correction account accounted non-constant reactor conditions caused gradual obstruction sample inlet. One symptom trend fragmentation, although greatest observed (1 relative isoprene. A PTR Data Toolkit (PTR-DT) developed assess performance rapidly estimate sensitivities which could not be directly calibrated on timescale using measured standards, molecular properties, simple reaction kinetics. Through this toolkit, standards' recreated within 8 values. Three clean-air sources compared: hydrocarbon trap, zero-grade ultra-high purity nitrogen, catalytic zero-air generator. generator yielded lowest signals majority ions, followed trap. Depending ionization efficiency, product ion transmission, background, limits detection (5 s measurement integration) ranged ppbv (methanol) pptv (decamethylcyclopentasiloxane; D5 siloxane) most standards having below 20 pptv. Finally, applications low are considered few low-signal species including sub-parts-per-trillion volume (pptv) enhancements icosanal (and isomers; min average) plume cooking emissions, dimethyl disulfide plumes containing other organosulfur compounds. Additionally, chromatograms hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane (D3, D4, siloxanes, respectively), combined high sensitivity, suggest that online can reasonably associated individual isomers.

Language: Английский

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Chemical characterization and health risk assessment of VOCs and PM2.5-bound PAHs emitted from typical Chinese residential cooking

Atmospheric Environment, Journal Year: 2022, Volume and Issue: 291, P. 119392 - 119392

Published: Sept. 21, 2022

Language: Английский

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Particulate organic emissions from incense-burning smoke: Chemical compositions and emission characteristics

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 897, P. 165319 - 165319

Published: July 4, 2023

Language: Английский

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Sulfate Formation by Photosensitization in Mixed Incense Burning–Sodium Chloride Particles: Effects of RH, Light Intensity, and Aerosol Aging

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(28), P. 10295 - 10307

Published: July 7, 2023

Elevated particulate sulfate concentrations have been frequently observed in coastal areas when air masses are influenced by continental emissions, especially combustion sources like biomass burning. We studied the SO2 uptake laboratory-generated droplets containing incense smoke extracts and sodium chloride (IS–NaCl) under irradiation found enhanced production over pure NaCl droplets, attributable to photosensitization induced constituents IS. Low relative humidity high light intensity facilitated formation increased coefficient IS–NaCl particles. Aging of IS particles further production, secondary oxidant promoted proportions nitrogen-containing CHN oxygen- CHON species air. Experiments using model compounds syringaldehyde, pyrazine, 4-nitroguaiacol verified enhancements formation. This work provides experimental evidence via triggered multiphase oxidation processes Our results can shed on possible interactions between sea salt burning aerosols enhancing production.

Language: Английский

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Oxidation Mechanism and Toxicity Evolution of Linalool, a Typical Indoor Volatile Chemical Product

Environment & Health, Journal Year: 2024, Volume and Issue: 2(7), P. 486 - 498

Published: April 2, 2024

Linalool, a high-reactivity volatile chemical product (VCP) commonly found in cleaning products and disinfectants, is increasingly recognized as an emerging contaminant, especially indoor air. Understanding the gas-phase oxidation mechanism of linalool crucial for assessing its impact on atmospheric chemistry human health. Using quantum calculations computational toxicology simulations, we investigated transformation toxicity evolution under low high NO/HO2· levels, representing outdoor environments. Our findings reveal that can undergo novel mechanisms involving concerted peroxy (RO2·) alkoxy radical (RO·) modulated autoxidation, particularly emphasizing importance cyclization reactions indoors. This expands widely known RO2·-dominated H-shift-driven autoxidation proposes generalized leads to formation low-volatility secondary organic aerosol (SOA) precursors. Toxicological analysis shows over half (TPs) exhibited higher carcinogenicity respiratory compared linalool. We also propose time-dependent toxic effects TPs assess their long-term toxicity. results indicate strong emission coupled with slow consumption rates lead significant health risks environment. The highlight complex air concerns regarding persistent during cleaning, which involves use or other VCPs.

Language: Английский

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Progress in the study of the emission characteristics of intermediate and semivolatile organic compounds from motor vehicles

Journal of Environmental Sciences, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

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