So2—particulate interactions: Recent observations
作者:
Robert Frank,
期刊:
American Journal of Industrial Medicine
(WILEY Available online 1980)
卷期:
Volume 1,
issue 3‐4
页码: 427-434
ISSN:0271-3586
年代: 1980
DOI:10.1002/ajim.4700010321
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: SO2;particulates;interactions
数据来源: WILEY
摘要:
AbstractThe toxicology of sulfur oxides is discussed briefly. The effects of sulfur dioxide (SO2) are largely confined to the upper airways except during exercise or if the gas is taken up by a carrier aerosol. SO2may be adsorbed as a monomolecular layer on dry particles, such as elemental carbon, or dissolved in aqueous droplets. Hydrated SO2forms bisulfite and sulfite ions, which are rapidly oxidized (detoxified) by sulfite oxidase, an enzyme, to form sulfate. SO2in carrier aerosols (dry or aqueous solutions) may be oxidized to sulfuric acid. The mixture of SO2(1 ppm) and a droplet of sodium chloride (1 mg/m3) has been shown to be synergistic in guinea pigs. In healthy adults, the same gas‐aerosol mixture caused no functional lung changes at rest (two separate studies), but did cause significant changes following moderate exercise. Shortness of breath and wheezing were experienced by about half of the subject
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