ArticleInternational archives of occupational and environmental health2021
Occupational exposure to particulate matter during blackboard teaching and its deposition in the airways of human lungs.
Article in International archives of occupational and environmental health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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3 authors at 1 institution in 1 country.
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Abstract
purposeThis study aims to estimate the teachers' exposure to particulate matter (PM) during a chalk and talk class considering various exposure conditions and to determine the deposition pattern of PM in human airways. MATERIALS AND METHODOLOGY: The study was carried out in three steps, viz., questionnaire survey, exposure measurement, and dosage calculation. Exposure to chalk dust during teaching was measured for 40 teachers in terms of PM of different size range (PM 10, PM 2.5, and PM 1) while using different brands of chalks. Deposition in lungs was determined using Multiple Path Dosimetry model for four subject categories, viz., adult men, elderly men, adult women, and elderly women.
resultsThe average exposure during teaching activity was 498, 85, and 30 µg/m
conclusionThis study showed that there was no significant difference in exposure to PM while using normal and dustless chalks. The exposure level suggests that there is a strong need to either shift to smart classes or to improve the technology in chalk production in such a way that it produces less dust and limit the exposure to teaching professionals.
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