TOF–SIMS surface analysis of chemical components of size–fractioned urban aerosols in a typical heavy air pollution event in Beijing

Li, Wenjun; Li, Hong; Li, Jinjuan; Cheng, Xueli; Zhang, Zhengzheng; Chai, Fahe; Zhang, Hao; Yang, Ting; Pengli, Duan; Lu, Defeng; Chen, Yizhen

doi:10.1016/j.jes.2017.04.005

Cited by 22 publications

(18 citation statements)

References 33 publications

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“…Nevertheless, PM 1 variation ( Figure S1a) displayed no valley in the late morning but a moderately broad peak (narrower in autumn and winter) from 8:00 to 20:00. Increasing daytime concentrations indicated secondary aerosol formation of PM 1 and PM 2.5 , while the difference in the daily PM 1 and PM 2.5 variations was probably caused by the diversity in the components resulting from the different particle diameters [45,46]. Water-soluble inorganic ions (WSII) are a significant component of PM [47], especially in the coastal area.…”

Section: Yearly Variations In Pahsmentioning

confidence: 99%

Characteristics of Polycyclic Aromatic Hydrocarbons (PAHs) and Common Air Pollutants at Wajima, a Remote Background Site in Japan

Zhang

Yang

et al. 2020

IJERPH

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Background: Background sites are mainly affected by long-range-transported air pollutants, resulting in potential adverse effects on local atmospheric environments. A 4–5 year observational study was conducted to illustrate the air pollution profile at the Kanazawa University Wajima air monitoring station (KUWAMS), an ideal remote background site in Japan. Methods: Nine polycyclic aromatic hydrocarbons (PAHs) in the particulate phase and various air pollutants were continuously monitored for 4–5 years. Diagnostic ratios of PAHs and back-trajectory analysis were applied to trace the possible sources of the air pollutants collected at the sampling site. Results: The atmospheric concentration of PAHs in the atmosphere at the site decreased from 2014 to 2019, benefit from the predominant air pollution control policy in China and Japan. Common air pollutants including sulfur dioxide (SO2), nitrogen oxides (NOx), ozone, methane (CH4), and non-methane hydrocarbon (NMHC) were detected in low concentrations from 2016 to 2019, while ozone (O3) and particulate matter (PM2.5, PM with a diameter less than 2.5 μm) were present in high levels that exceeded the Japanese standards. Most air pollutants peaked in spring and showed evident diurnal variations in spring and summer. Conclusions: This is the first study to clarify the atmospheric behaviors of multiple air pollutants at a background site in Japan. Significant external air pollutant impact and unneglectable air pollution were demonstrated at KUWAMS, indicating the importance of studying atmospheric pollution at remote sites.

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Section: Yearly Variations In Pahsmentioning

confidence: 99%

Characteristics of Polycyclic Aromatic Hydrocarbons (PAHs) and Common Air Pollutants at Wajima, a Remote Background Site in Japan

Zhang

Yang

et al. 2020

IJERPH

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“…22,23 Many scientists have applied ToF-SIMS to analyze the surface composition and imaging of atmospheric particulate matter. 24,25 ToF-SIMS spectra are usually very complex. For example, hundreds of peaks can be found in a single spectrum.…”

Section: Funding Informationmentioning

confidence: 99%

“…41,42 Even though the concentrations of SO 2 and NO 2 on that day are relatively low, they could still make a great contribution to particulate mat- Table 4, which may correspond to substances in soil, cement, or lime. 23,25,44 Beijing has frequent sandstorms in spring, during which the sand and dust from the north contribute greatly to the PM 2.5 in the spring in Beijing. The dust can stay in the near-surface atmosphere for a long time so the silicon can be found even in the good air quality days in spring.…”

Section: Pca Of Aerosol Particle From Four Seasonsmentioning

confidence: 99%

“…Time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) is a relatively new method in this area, but due to its high surface sensitivity and remarkable lateral/depth resolution, ToF‐SIMS has become a useful tool for the analysis of chemical composition of PM and even single particles . Many scientists have applied ToF‐SIMS to analyze the surface composition and imaging of atmospheric particulate matter . ToF‐SIMS spectra are usually very complex.…”

Section: Introductionmentioning

confidence: 99%

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ToF‐SIMS analysis of chemical composition of atmospheric aerosols in Beijing

Jia

Che

et al. 2019

Surface & Interface Analysis

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Atmospheric aerosols collected from each season in urban Beijing have been studied using time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS). The chemical composition of atmospheric aerosol particles during various atmospheric pollution levels was analyzed and distinguished by principal component analysis (PCA). The differences and sources of the components of the aerosol particles were explored. The results showed that the fine particulate matter from heavily polluted days mainly consists of inorganic salts and organic compounds, such as hydrocarbons, nitrogen‐ or sulfur‐containing hydrocarbons, and their oxides. Samples collected from clean days in the four seasons were also analyzed. Only the samples collected in spring showed a significant difference from the other three seasons. We concluded that the main source of pollution in the Beijing urban area was fossil fuel combustion from motor vehicles.

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“…During the past decades, the surface compositions of aerosol particles have been directly studied using several analysis techniques such as scanning electron microscopy combined with energy dispersive X-ray spectroscopy (SEM-EDX), 7 X-ray photoelectron spectroscopy (XPS), [7][8][9] time-of-flight secondary ion mass spectrometry (ToF-SIMS), [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] and near-edge X-ray adsorption fine structure (NEXAFS) spectroscopy. 26 Among these techniques, ToF-SIMS has been widely used to investigate the surface composition of aerosol particles in order to locate their emission sources and predict their potential impacts on human health and environment.…”

Section: Introductionmentioning

confidence: 99%

Effects of pretreatment temperature on the analysis of size‐fractionated aerosol particles using ToF‐SIMS

Xie

Weng

et al. 2020

Surface & Interface Analysis

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Size‐fractionated aerosol particles were collected with a MOUDI 10‐stage cascade impactor from an urban roadside place in a downtown area of Hong Kong. Fine aerosol particulate samples from stage 6 (aerodynamic particle diameter between 0.56 and 1 μm) and stage 9 (aerodynamic particle diameter between 0.10 and 0.18 μm) were pretreated at a chosen temperature, including −100°C, −50°C, 25°C, and 60°C, in a load lock chamber and then analyzed using time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) at the same temperature (−100°C). Principal component analysis (PCA) was applied to further analyze ToF‐SIMS spectra of aerosol particles with different pretreatment temperatures from two selected stages. ToF‐SIMS results showed that the intensities of aliphatic hydrocarbon ions such as C4H7+ and C4H9+ and amine ions such as C2H8N+ and C4H12N+ decreased with an increase of the pretreatment temperature under ultrahigh vacuum conditions. We have shown that analyses of this type of aerosol particles using ToF‐SIMS should not be conducted at ambient temperature but at low temperature (eg, −50°C). In addition, we also developed a procedure that can be used to analyze aerosol particle samples under ultrahigh vacuum environment.

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TOF–SIMS surface analysis of chemical components of size–fractioned urban aerosols in a typical heavy air pollution event in Beijing

Cited by 22 publications

References 33 publications

Characteristics of Polycyclic Aromatic Hydrocarbons (PAHs) and Common Air Pollutants at Wajima, a Remote Background Site in Japan

Characteristics of Polycyclic Aromatic Hydrocarbons (PAHs) and Common Air Pollutants at Wajima, a Remote Background Site in Japan

ToF‐SIMS analysis of chemical composition of atmospheric aerosols in Beijing

Effects of pretreatment temperature on the analysis of size‐fractionated aerosol particles using ToF‐SIMS

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