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KMID : 0895419960060020265
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Journal of Korean Society of Occupational and Enviromental Hygiene
1996 Volume.6 No. 2 p.265 ~ p.271
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Estimation of Occupational Health Standard by Relationship between Airborne Lead Concentration by Particle Size and Lead in Blood
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Abstract
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This study was conducted to investigate distribution of lead particles by operation of industry, to evaluate the effect of particle size on the absorption to workers, and to recommend the Occupational Health Standard for lead. Total lead concentrations in the secondary smelting industry were higher than those in the battery and litharge manufacturing industry. Total lead concentrations in other industries except radiator manufacturing industry exceeded the standard of 50 ㎍/㎥. Only radiator manufacturing industry indicated lead concentrations significantly lower than those in other industries(p$lt;0.05). Average blood lead level of workers was 85.1 ㎍/㎗ in secondary smelting manufacturing, 51.3 ㎍/㎗ in the battery manufacturing, and below 40 ㎍/㎗ in the litharge and radiator manufacturing industry. Blood lead levels of workers by industry were significantly different(p$lt;0.05). From relationship between airborne lead concentrations by size and lead in blood, confidence limits of airborne lead concentration equivalent to 40㎍/㎗ of permissible limit in blood, was 147.9 - 489.8 ㎍/㎥ as total lead and 28.8 - 79.4 ㎍/㎥ as ACGIH-RPM. It is recommended that two separate occupational health standards for lead should be established by particle size. Airborne concentration of 150 ㎍/㎥ as fatal lead dust and 30 ㎍/㎥ as respirable lead dust was recommended.
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