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Surface reactions of SO 2 on metallic particles

Authors
  • Conte, Corrado
  • Devitofrancesco, Giuseppe
  • Di Castro, Valeria
Type
Published Article
Journal
Atmospheric Environment (1967)
Publisher
Elsevier
Publication Date
Jan 01, 1989
Volume
23
Issue
9
Pages
1939–1943
Identifiers
DOI: 10.1016/0004-6981(89)90518-0
Source
Elsevier
Keywords
License
Unknown

Abstract

In this note the particle surface transformations are examined, using the results obtained by electronic spectroscopy measurements. The tests concerned the preparation of condensation aerosols from metallic (Zn, Cd) vapours in N 2 flow (or N 2 and O 2) so as to obtain clean surfaces immediately brought in contact with the gas. On the surface, new sulphurated compounds and physically adsorbed gas layers were generated and revealed by degassing, using X-ray photoelectron spectroscopy (XPS-ESCA). The determination of the sulphur chemical state on the surface suggests a model of the particles composed of a metallic core and a layer, which depends on the particles' reactivity to the gas. These transformations can be responsible for behaviour in the atmosphere and irritant properties, and for dangerous effects for human health.

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