globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosenv.2018.02.004
Scopus ID: 2-s2.0-85041405694
Size-segregated urban aerosol characterization by electron microscopy and dynamic light scattering and influence of sample preparation
Author: Marvanová S; , Kulich P; , Skoupý R; , Hubatka F; , Ciganek M; , Bendl J; , Hovorka J; , Machala M
Source Publication: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
Publishing Year: 2018
Volume: 178
pages begin: 181
pages end: 190
Language: 英语
Keyword: Agglomeration ; Dynamic light scattering ; Electron microscopy ; Energy dispersive X-ray spectroscopy ; Particulate matter ; Size-segregated
Scopus Keyword: Agglomeration ; Body fluids ; Cell culture ; Dynamic light scattering ; Electron microscopes ; Electron microscopy ; Energy dispersive spectroscopy ; Freezing ; Mammals ; Meteorological instruments ; Particle size ; Particle size analysis ; Sand and gravel plants ; Size distribution ; Soot ; X ray spectroscopy ; Aerodynamic diameters ; Carbonaceous particles ; Elemental compositions ; Energy dispersive X ray spectroscopy ; Experimental conditions ; Metallic nanospheres ; Particulate Matter ; Size-segregated ; Light scattering ; inorganic salt ; nanosphere ; water ; aerosol ; aerosol composition ; agglomeration ; electron microscopy ; freeze-thaw cycle ; light scattering ; particle size ; particulate matter ; sample preparation ; separation ; size distribution ; urban area ; Article ; chemical composition ; dispersity ; elemental analysis ; energy dispersive X ray spectroscopy ; extraction ; freeze thawing ; in vitro study ; particle size ; particulate matter ; photon correlation spectroscopy ; priority journal ; scanning electron microscopy ; soot ; suspension ; transmission electron microscopy ; ultrasound ; urban area ; Czech Republic ; Prague [Czech Republic] ; Bovinae
Subject of Scopus: Environmental Science: Water Science and Technology ; Earth and Planetary Sciences: Earth-Surface Processes ; Environmental Science: Environmental Chemistry
English Abstract: Size-segregated particulate matter (PM) is frequently used in chemical and toxicological studies. Nevertheless, toxicological in vitro studies working with the whole particles often lack a proper evaluation of PM real size distribution and characterization of agglomeration under the experimental conditions. In this study, changes in particle size distributions during the PM sample manipulation and also semiquantitative elemental composition of single particles were evaluated. Coarse (1–10 μm), upper accumulation (0.5–1 μm), lower accumulation (0.17–0.5 μm), and ultrafine (<0.17 μm) PM fractions were collected by high volume cascade impactor in Prague city center. Particles were examined using electron microscopy and their elemental composition was determined by energy dispersive X-ray spectroscopy. Larger or smaller particles, not corresponding to the impaction cut points, were found in all fractions, as they occur in agglomerates and are impacted according to their aerodynamic diameter. Elemental composition of particles in size-segregated fractions varied significantly. Ns-soot occurred in all size fractions. Metallic nanospheres were found in accumulation fractions, but not in ultrafine fraction where ns-soot, carbonaceous particles, and inorganic salts were identified. Dynamic light scattering was used to measure particle size distribution in water and in cell culture media. PM suspension of lower accumulation fraction in water agglomerated after freezing/thawing the sample, and the agglomerates were disrupted by subsequent sonication. Ultrafine fraction did not agglomerate after freezing/thawing the sample. Both lower accumulation and ultrafine fractions were stable in cell culture media with fetal bovine serum, while high agglomeration occurred in media without fetal bovine serum as measured during 24 h. © 2018 Elsevier Ltd
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Document Type: 期刊论文
Appears in Collections:气候变化事实与影响

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Affiliation: Veterinary Research Institute, Department of Chemistry and Toxicology, Hudcova 296/70, Brno, Czech Republic; Institute of Scientific Instruments of the CAS, Královopolská 147, Brno, Czech Republic; Veterinary Research Institute, Department of Pharmacology and Immunotherapy, Hudcova 296/70, Brno, Czech Republic; Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, Prague, Czech Republic

Recommended Citation:
Marvanová S,, Kulich P,, Skoupý R,et al. Size-segregated urban aerosol characterization by electron microscopy and dynamic light scattering and influence of sample preparation[J]. Atmospheric Environment,2018-01-01,178
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