Different characteristics of individual particles from light-duty diesel vehicle at the launching and idling state by AAC-SPAMS

Bi, Xinhui; Zhang, Guohua; Zhuo, Zeming; Xie, Qinhui; Du, Xubing; Fu, Yuzhen; Wu, Si; Huang, Feifei; Bi, Xinhui; Li, Xue; Li, Lei; Zhou, Zhen

doi:10.1016/j.jhazmat.2021.126304

Cited by 14 publications

(10 citation statements)

References 89 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ρ eff was proportional to ambient particle size (r 2 = 0.93, Fig. S6b), which was distinct from that of fresh vehicle emissions studied by Su et al (2021).…”

Section: Effective Density Of Aerosol Particlesmentioning

confidence: 81%

“…Recently, an aerodynamic aerosol classifier (AAC) tandem SPAMS system was established by Peng et al (2021) to determine the volume equivalent diameter (D ve ) and ρ eff of different types of aerosol particles. This system was then used to analyze the characteristics of particles emitted from diesel vehicle engines with different mixing state (Su et al, 2021). The results showed largely different ρ eff for aerosol particles emitted under launching and idling conditions (0.66 vs. 0.34 g cm -3 ).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Mixing state and effective density of aerosol particles during the Beijing 2022 Olympic Winter Games

Sun

Liu

et al. 2023

Preprint

View full text Add to dashboard Cite

Abstract. Mixing state and density are two key parameters of aerosol particles affecting their impacts on radiative forcing and human health. Here a single particle aerosol mass spectrometer in tandem with a differential mobility analyzer and an aerodynamic aerosol classifier was deployed during the Beijing 2022 Olympic Winter Games (OWG) to investigate the impacts of emission controls on particle mixing state and density. Nearly 760,000 particles were detected, which were classified into seven major classes. Our results showed the dominance of carbonaceous particles comprising mainly Total-EC (13.4 %), Total-OC (10.5 %) and Total-ECOC (47.1 %). Particularly, the particles containing organic carbon and sulfate were enhanced significantly during OWG although those from primary emissions decreased. The composition of carbonaceous particles also changed significantly which was characterized by the decreases in EC-NS, KEC-N, and amine-containing particles, and increase in ECOC-NS. This result indicates that emission controls during OWG reduced the mixing of elemental carbon (EC) with inorganic aerosol species and amines, yet increased the mixing of EC with organic aerosol. The average effective density (ρeff) of aerosol particles (150–300 nm) was 1.20 g cm−3 with higher values during OWG (1.26 g cm−3) due to the increase in secondary particle contribution. The two types of fresh particles, i.e., Total-EC and high molecular weight organic matter presented the lowest ρeff (0.97 g cm−3 and 0.87 g cm−3, respectively). In addition, the ρeff of most particles increased as the increases in pollution levels and relative humidity, yet varied differently for different types of particles, highlighting the impacts of aging and formation processes on the changes of particle density and mixing state.

show abstract

“…The ρ eff was proportional to ambient particle size (r 2 = 0.93, Fig. S6b), which was distinct from that of fresh vehicle emissions studied by Su et al (2021).…”

Section: Effective Density Of Aerosol Particlesmentioning

confidence: 81%

mentioning

confidence: 99%

Mixing state and effective density of aerosol particles during the Beijing 2022 Olympic Winter Games

Sun

Liu

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Nevertheless, the results via SPAMS are also reliable because of its broad datasets with high temporal resolution. Therefore, the analyses of particle count, size, and chemical composition (by peak area) can be considered semi-quantitative from a statistical perspective (Healy et al, 2012;Su et al, 2021a;Zhang et al, 2021).…”

Section: Spamsmentioning

confidence: 99%

Supplementary material to "Enrichment of calcium in sea spray aerosol through bulk measurements and individual particle analysis during the R/V Xuelong cruise over the Ross Sea, Antarctica"

Bi¹,

Bi²,

Zhang³

et al. 2023

Preprint

View full text Add to dashboard Cite

“…In addition to 23 Na + and 39 K + metal ion peaks, there are als large number of amino acid decarboxylic ion peaks in the positive spectrum. The posit ion peaks were mainly 30 [Glycine-COOH] + , 59 [C3NH9] + , 70 [Proline-COOH] + , 72 [Vali COOH] + , 74 [Threonine-COOH] + , 84 [C5NH10] + , 86 [Leucine-COOH] + , 110 [Histidine-COOH and 120 [Phenylalanine-COOH] + . The negative ionic peaks are mainly organic nitrog 26 CN − , 42 CNO − , phosphate 63 PO2 − , 79 PO3 − , 97 H2PO4 − , 159 H(PO3)2 − , 199 NaH2P2O7 − , and other co mon biological ionic peaks.…”

Section: Characteristic Spectrum Of Bioaerosolsmentioning

confidence: 99%

Bioaerosol Identification by Wide Particle Size Range Single Particle Mass Spectrometry

Zhuo

et al. 2023

Atmosphere

Self Cite

View full text Add to dashboard Cite

The properties of bioaerosols are complex and diverse, and have a direct impact on the environment, climate, and human health. The effective identification of bioaerosols in the atmosphere is very significant with regard to accurately obtaining the atmospheric chemical characteristics of bioaerosols and making biological early warnings and predictions. To improve the detection of large particle bioaerosol and non-bioaerosol interference in the process of bioaerosol recognition this study detected a variety of bioaerosols and abiotic aerosols based on a single particle aerosol mass spectrometer (SPAMS). Furthermore, the bioaerosol particle identification and classification algorithm based on Zawadowicz the ratio of phosphate to organic nitrogen is optimized to distinguish bioaerosols from abiotic aerosols. The influence of ionized laser energy on classification methods is thoroughly explored here. The results show that 15 kinds of pure fungal aerosols were detected by SPAMS based on a wide size range sampling system, and that fungal aerosols with a particle size of up to 10 μm can be detected. Through the mass spectra peak ratio method of PO3−/PO2− and CNO−/CN−, when discriminating abiotic aerosols such as disruptive biomass combustion particles, automobile exhaust, and dust from pure bacterial aerosols, the discrimination degree is up to 97.7%. The optimized ratio detection method of phosphate to organic nitrogen has strong specificity, which can serve as the discriminant basis for identifying bioaerosols in SPAMS analytical processes.

show abstract

Different characteristics of individual particles from light-duty diesel vehicle at the launching and idling state by AAC-SPAMS

Cited by 14 publications

References 89 publications

Mixing state and effective density of aerosol particles during the Beijing 2022 Olympic Winter Games

Mixing state and effective density of aerosol particles during the Beijing 2022 Olympic Winter Games

Supplementary material to "Enrichment of calcium in sea spray aerosol through bulk measurements and individual particle analysis during the R/V Xuelong cruise over the Ross Sea, Antarctica"

Bioaerosol Identification by Wide Particle Size Range Single Particle Mass Spectrometry

Contact Info

Product

Resources

About