Source apportionment of atmospheric volatile aromatic compounds (BTEX) by stable carbon isotope analysis: A case study during heating period in Taiyuan, northern China

Li, Yinghui; Yan, Yulong; Hu, Dongmei; Li, Zhisheng; Hao, Aisheng; Li, Rumei; Wang, Cheng; Xu, Yang; Cao, Jingyuan; Liu, Zhuocheng; Lin, Peng

doi:10.1016/j.atmosenv.2020.117369

Cited by 20 publications

(5 citation statements)

References 35 publications

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“…The gradual decrease of Benzene may be the result of traffic plan, bus rapid transit and subway development. As a possible source, the contribution of coal combustion in industries has recently become of great concern in similar megacities (Li et al 2020 ). These sources may explain the reason behind the temporal leap of Toluene concentration during the pandemic period as well, especially when considering the decline of traffic congestion (Figure S4) after the start of the lockdown and viral outbreak in early 2019.…”

Section: Resultsmentioning

confidence: 99%

Spatiotemporal variations, photochemical characteristics, health risk assessment and mid pandemic changes of ambient BTEX in a west Asian metropolis

Dehhaghi

Hasankhani

Taheri

2023

Stoch Environ Res Risk Assess

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This study examined the concentration of BTEX in Tehran from 2018 to 2020 in five monitoring stations with different backgrounds, which has been accomplished using the combination of passive sampling and GC-FID method. The total concentration of BTEX was estimated to be 65.39 (µg/m 3 ), with a higher average concentration in 2019–2020 (77.79 µg/m 3 ) compared to 2018–2019 (53.48 µg/m 3 ) due to the leaping concentration of Toluene in the pandemic era. Despite a Benzene concentration decline in recent years, the average annual concentration of Benzene (5.66 µg/m 3 ) at five stations remained higher than the EU commission and India standards (5 µg/m 3 ) as well as Japan and Iraq thresholds (3 µg/m 3 ). Toluene dominated other species in terms of concentrations, mass distribution (~0.6%), followed by m,p–Xylene (~0.2%), Benzene (~0.05–0.1) and Ethylbenzene (< 0.05). The evidence regarding seasonal changes of BTEX in 2019 shows the maximum concentration of these compounds in autumn, which is probably due to heavier traffic compared to other seasons. In contrast, in the first half of 2020 (which encompasses the start of the pandemic period and urban lockdown), point sources seem to play a prominent role in concentration fluctuations, as confirmed by changes in interspecies relationships and lower traffic congestion. The highest mean concentrations were observed in high-traffic, residential and suburban sites, respectively. The study reveals that m,p-Xylene possess the highest Ozone formation potential (~109.46), followed by Toluene (~85.34), o-Xylene (~46.87), Ethylbenzene (~13.52) and Benzene (~2.61). Health risk assessment results indicated the high carcinogenic risk of Benzene (mean = 3.6 × 10 –6 ) and the acceptable non-carcinogenic risk of BTEX (hazard index~0.03 < specified limit of 1). Finally, the estimated weighted exposures of BTEX emphasized that residents near the high-traffic districts are more exposed to BTEX. Supplementary Information The online version contains supplementary material available at 10.1007/s00477-023-02476-3.

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Section: Resultsmentioning

confidence: 99%

Spatiotemporal variations, photochemical characteristics, health risk assessment and mid pandemic changes of ambient BTEX in a west Asian metropolis

Dehhaghi

Hasankhani

Taheri

2023

Stoch Environ Res Risk Assess

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“…Table S1: Content of gasoline related vapors in VOCs source analysis in different countries; Table S2: Parameters of adsorption kinetics of gasoline vapor onto K-thACs; Table S3: The pseudo-first-order and pseudo-second-order kinetic parameters of gasoline vapor adsorption on K-thACs; Table S4: Modeled adsorption parameters for intraparticle diffusion of gasoline vapor on K-thACs. References [48][49][50][51][52][53][54] are cited in the supplementary materials.…”

Section: Supplementary Materialsmentioning

confidence: 99%

Synthesis of Porous Activated Carbon Doped with Tetramethylammonium Hydroxide: Evaluation of Excellent Gasoline Vapor Adsorption Performance and Activation Mechanism

Yang

Gong

et al. 2023

Molecules

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The rapid urbanization and industrialization in China have led to an urgent dilemma for controlling urban air pollution, including the intensified emission of gasoline vapor into the atmosphere. Herein, we selected highland barley straw as a raw material and KOH and tetramethylammonium hydroxide (TMAOH) as activators to synthesize nitrogen-doped layered porous carbon (K-thAC) by a three-step activation method. The obtained K-thAC materials had a high specific surface area, reaching 3119 m2/g. Dynamic adsorption experiments demonstrated a superior adsorption capacity of up to 501 mg/g (K-thAC-25) for gasoline vapor compared with other documented carbon adsorbents. Moreover, adjusting the ratio of raw materials with a series of active ingredients could further improve the pore properties of the obtained K-thACs and their adsorption performance for gasoline vapor. Furthermore, the K-thAC materials were also characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), synchronous thermogravimetry (STA), X-ray powder diffraction (XRD), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and nitrogen adsorption tests. This study synthesized a novel plant-based material to treat gasoline vapor pollution efficiently.

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“…Among the different environmental compartments (water, soil, and atmospheric air), air pollution is the one that has caused the most harmful effects on the population, in addition to the highest number of deaths (Landrigan et al, 2018). Thus, it is crucial to evaluate the different polluting substances present in the air, in addition to identifying their emission sources and, thus, creating a diagnosis that minimizes the release of these pollutants at the local and global level Li et al, 2020;Vieira et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Air pollution as a proposal for chemistry teaching

Figueiredo,

Souza,

Canela

et al. 2024

Navigating Through the Knowledge of Education

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The increase in air pollution has caused harmful effects on fauna, flora and changes in biogeochemical cycles, making it crucial to raise society's awareness in mitigating and reducing these pollutants in the air. In this way, environmental awareness during basic education through Chemistry has become decisive for the social formation of the entire community. The objective of this work was to apply an interdisciplinary approach to the Teaching of Chemistry in basic education, through a thematic workshop using the Plickers platform as a complementary technological resource for the application of questionnaires. In addition, a gamification (board game) was carried out to promote teaching in a more interactive, dynamic and relaxed way, arousing greater interest among students. Finally, the results obtained helped in the teaching-learning process, highlighting new skills of the students that are often omitted in traditional teaching.

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Source apportionment of atmospheric volatile aromatic compounds (BTEX) by stable carbon isotope analysis: A case study during heating period in Taiyuan, northern China

Cited by 20 publications

References 35 publications

Spatiotemporal variations, photochemical characteristics, health risk assessment and mid pandemic changes of ambient BTEX in a west Asian metropolis

Spatiotemporal variations, photochemical characteristics, health risk assessment and mid pandemic changes of ambient BTEX in a west Asian metropolis

Synthesis of Porous Activated Carbon Doped with Tetramethylammonium Hydroxide: Evaluation of Excellent Gasoline Vapor Adsorption Performance and Activation Mechanism

Air pollution as a proposal for chemistry teaching

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