Titre du document / Document title
Identification of possible sources of particulate matter in the personal cloud using SEM/EDX
Auteur(s) / Author(s)
CONNER Teri L. (1) ;
WILLIAMS Ronald W. (1) ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
(1) US EPA, National Exposure Research Laboratory, Research Triangle Park, NC, 27711, ETATS-UNIS
Résumé / Abstract
The United States Environmental Protection Agency (US EPA) conducted the Baltimore Particulate Matter (PM) Epidemiology-Exposure Study of the Elderly during the summer of 1998. The study design included PM
2.5 samples obtained from elderly (65+ years of age) retirement facility residents using personal exposure sampling devices. These sampling devices were also used to obtain PM
2.5 samples at fixed locations within the personal monitoring subjects' apartments. Selected personal and apartment samples were examined using scanning electron microscopy with individual-particle X-ray analysis (SEM/EDX), providing a qualitative assessment of the chemical and physical characteristics of geological and trace element particles collected within these micro-environments at the retirement facility. This information was used to identify possible indoor source particles. The manual surveys of the personal samples revealed that some particles larger than 2.5 μm reached the filter surface. Using SEM/EDX, several particle types with possible indoor origins were identified. The Al-Zr-Cl particle is likely to have originated from a personal antiperspirant product. Particles with a talc or alumino-silicate composition point to cosmetics as a possible source. Large cadmium-containing particles were also found, which may indicate the use of art pigments or ceramic glazes, or emissions from television screen phosphors. A greater variety of particles was observed in a personal sample compared with its corresponding fixed-location apartment sample.
Revue / Journal Title
Atmospheric environment
ISSN
1352-2310
Source / Source
Congrès
American Association for Aerosol Research. Specialty Conference N
o1, Pittsburgh, PA
, ETATS-UNIS
(31/03/2003)
2004, vol. 38, n
o 31 (185 p.) [Document : 6 p.] (7 ref.), pp. 5305-5310 [6 page(s) (article)]
Langue / Language
Anglais
Editeur / Publisher
Elsevier, Kidlington, ROYAUME-UNI
(1994)
(Revue)
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Localisation / Location
INIST-CNRS, Cote INIST : 8940 B, 35400011413763.0120
Nº notice refdoc (ud4) : 16100711
