Significance of Volatile Organic Compounds to Secondary Pollution Formation and Health Risks Observed during a Summer Campaign in an Industrial Urban Area

Toxics, Год журнала: 2024, Номер 12(1), С. 34 - 34

Опубликована: Янв. 1, 2024

The chemical complexity and toxicity of volatile organic compounds (VOCs) are primarily encountered through intensive anthropogenic emissions in suburban areas. Here, pollution characteristics, impacts on secondary formation, health risks were investigated continuous in-field measurements from 1–30 June 2020 Nanjing, adjacent to national petrochemical industrial parks China. On average, the total VOCs concentration was 34.47 ± 16.08 ppb, which comprised mostly by alkanes (41.8%) halogenated hydrocarbons (29.4%). In contrast, aromatics (17.4%) dominated ozone formation potential (OFP) aerosol (SOAFP) with 59.6% 58.3%, respectively. Approximately 63.5% emitted industry solvent usage based source apportionment results, followed biogenic 22.3% vehicle 14.2%. Of observed 46 VOC species, hexachlorobutadiene, dibromoethane, butadiene, tetrachloroethane, vinyl chloride contributed as high 98.8% carcinogenic risk, a large fraction ascribed high-level during episodes nighttime. Therefore, mitigation industries would be an effective way reduce conurbation

Язык: Английский

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Biogenic volatile organic compounds emissions, atmospheric chemistry, and environmental implications: a review

Environmental Chemistry Letters, Год журнала: 2024, Номер unknown

Опубликована: Окт. 4, 2024

Язык: Английский

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Sensitivity analysis of ozone formation and source apportionment of VOCs in a typical industrial city in the Yangtze River Delta Region during summer

Atmospheric Pollution Research, Год журнала: 2025, Номер unknown, С. 102424 - 102424

Опубликована: Янв. 1, 2025

Язык: Английский

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Performance and mechanism of modified red mud for the toluene adsorption

Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 115587 - 115587

Опубликована: Янв. 1, 2025

Язык: Английский

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Volatile organic compounds (VOCs) emissions from internal floating-roof tank in oil depots in Beijing: Influencing factors and emission reduction strategies analysis

The Science of The Total Environment, Год журнала: 2024, Номер 916, С. 170222 - 170222

Опубликована: Янв. 21, 2024

Язык: Английский

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The Characteristics, Sources, and Health Risks of Volatile Organic Compounds in an Industrial Area of Nanjing

Toxics, Год журнала: 2024, Номер 12(12), С. 868 - 868

Опубликована: Ноя. 29, 2024

This study investigates the chemical complexity and toxicity of volatile organic compounds (VOCs) emitted from national petrochemical industrial parks their effects on air quality in an area Nanjing, China. Field measurements were conducted 1 December 2022, to 17 April 2023, focusing VOC concentrations speciations, diurnal variations, ozone formation potential (OFP), source identification, associated health risks. The results revealed average total (TVOC) concentration 15.9 ± 12.9 ppb OFP 90.1 109.5 μg m−3. Alkanes constituted largest fraction VOCs, accounting for 44.1%, while alkenes emerged as primary contributors OFP, comprising 52.8%. TVOC peaked before dawn, a pattern attributed early morning activities nighttime heavy vehicle operations. During periods classified clean, when levels below 160 m−3, both (15.9 ppb) (90.4 110.0 m−3) higher than those during polluted hours. analysis identified key sources emissions, including automobile exhaust, oil gas evaporation, discharges, with additional pollution adjacent regions. Health risk assessments indicated that acrolein exceeded non-carcinogenic threshold at specific times. Moreover, trichloromethane, 1,3-butadiene, 1,2-dichloroethane, benzene found surpass acceptable lifetime carcinogenic level (1 × 10−6) certain periods. These findings highlight urgent need enhanced monitoring regulatory measures aimed mitigating emissions protecting public areas. In context complex urban areas, policymakers should focus controlling which can not only reduce secondary pollution, but also inhibit harm toxic substances human health.

Язык: Английский

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Emissions of volatile organic compounds from Chinese coal-fired power plants: Characteristics, source profile, inventories, and impacts

The Science of The Total Environment, Год журнала: 2024, Номер 947, С. 174304 - 174304

Опубликована: Июнь 28, 2024

Язык: Английский

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Characteristics and sources of nonmethane volatile organic compounds (NMVOCs) and O₃–NO_x–NMVOC relationships in Zhengzhou, China

Atmospheric chemistry and physics, Год журнала: 2024, Номер 24(15), С. 8549 - 8567

Опубликована: Авг. 1, 2024

Abstract. Nonmethane volatile organic compounds (NMVOCs) are important precursors of ozone (O3) formation under sufficient nitrogen oxide conditions. Understanding the characteristics and emission sources NMVOCs, as well relationship between NMVOCs O3, is great significance for effective O3 pollution control. In this study, continuous online monitoring was carried out in Zhengzhou, Henan, from 1–30 June. Furthermore, study provided recommendations strategies aimed at reducing formation. During observation period, concentration total (TNMVOCs) varied 9.9 to 60.3 ppbv, with an average 22.8 ± 8.3 ppbv. The TNMVOCs during events higher than on clean days. Six major were identified using positive-matrix-factorization model. Vehicular exhausts (28 %), solvent usage (27 industrial production (22 %) main sources. We explore O3–precursors propose observation-oriented control strategies. results relative incremental reactivity (RIR) Empirical Kinetics Modeling Approach show that Zhengzhou anthropogenic compound (AVOC)-limited regime. had largest RIR value, while NOx exhibited a negative value. It noteworthy sensitivity biogenic (BVOCs) greater AVOCs. Considering reduction effect, it recommended ratio AVOCs be maintained no less 3:1 effectively reduce

Язык: Английский

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Monitoring and Comparative Analysis of NO2 and HCHO in Shanghai Using Dual-Azimuth Scanning MAX-DOAS and TROPOMI

Remote Sensing, Год журнала: 2025, Номер 17(3), С. 355 - 355

Опубликована: Янв. 22, 2025

This study employed dual-azimuth scanning MAX-DOAS to monitor vertical column densities of NO2 and HCHO in Shanghai during the summer winter 2023, compared results with Sentinel-5P TROPOMI data. Dual-azimuth revealed a generally consistent trend gas concentrations (r > 0.95), but at 90° were higher than those 0°, especially near surface. suggests that averaging multiple azimuth angles is necessary better represent regional pollution levels. During observation period, diurnal patterns exhibited “double peak” morning evening, which was more pronounced summer, while peaked between 13:00 15:00. Comparisons data demonstrated overall good agreement. However, probability TROPOMI’s measurements being lower 80% 62.5%, respectively. Furthermore, tended overestimate high concentrations, overestimation reaching 41.14% for when exceeding 9.54 × 1015 molecules/cm2 25.93% 1.26 1016 molecules/cm2. Sensitivity analysis sampling distance (0–40 km) samples ground-based site, time (±5 ±60 min) relative overpass, using 15–25 km 10–20 HCHO, along appropriately shortening times extending them can effectively enhance consistency satellite observations. These findings not only reveal spatiotemporal distribution characteristics pollutants optimize parameters satellite–ground validation, providing support improving enhancing accuracy retrieval algorithms.

Язык: Английский

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A combined DFT and experimental study for the synergistic removal of NO and toluene on FeVO4/TiO2 catalysts: Insights from redox ability and charge transfer

Process Safety and Environmental Protection, Год журнала: 2025, Номер unknown, С. 107204 - 107204

Опубликована: Апрель 1, 2025

Язык: Английский

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