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Document ID (ISN)53572
CIS number 90-532
ISSN - Serial title 0007-1072 - British Journal of Industrial Medicine
Year 1989
Convention or series no.
Author(s) Osterman J.W., Greaves I.A., Smith T.J., Hammond S.K., Robins J.M., ThÚriault G.
Title Respiratory symptoms associated with low sulphur dioxide exposure in silicon carbide production workers
Bibliographic information Sep. 1989, Vol.46, No.9, p.629-635. 36 ref.
Abstract Relations between pulmonary symptoms and exposure to respirable dust and sulfur dioxide (SO2) were evaluated for 145 silicon carbide (SiC) production workers with an average of 13.9 (range 3-41) years of experience in this industry. Eight-hour time-weighted average exposures to SO2 were 1.5ppm or less with momentary peaks up to 4ppm. Cumulative SO2 exposure averaged 1.94ppm-years. Low level respirable dust exposures also occurred. Highly significant, dose dependent relations were found between cumulative and average exposure to SO2 and symptoms of usual and chronic phlegm, usual and chronic wheeze, and mild exertional dyspnoea. Mild and moderate dyspnoea were also associated with most recent exposure to SO2. Cough was not associated with SO2. No pulmonary symptoms were associated with exposure to respirable dust nor were any symptoms attributable to an interaction between dust and SO2. Cigarette smoking was strongly associated with cough, phlegm, and wheezing, but not dyspnoea. A greater than additive (synergistic) effect between smoking and exposure to SO2 was present for most symptoms. These findings suggest that current threshold limits for SO2 may not adequately protect workers in this industry.
Descriptors (primary) carbides; silicon; sulfur dioxide; respirable dust; synergism; functional respiratory disorders
Descriptors (secondary) silicon carbide; smoking; respiratory function tests; questionnaire survey; exposure evaluation
Document type D - Periodical articles
Subject(s) Dust, aerosols and related diseases
Broad subject area(s) Chemical safety
Browse category(ies) Diseases of the respiratory system (except for pneumoconiosis & similar)
Inorganic sulfur compounds
Silicon compounds
Inorganic substances