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KMID : 0895419940040020168
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Journal of Korean Society of Occupational and Enviromental Hygiene
1994 Volume.4 No. 2 p.168 ~ p.179
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A Study on Work´s Exposure to Dust , Crystalline Free Silica and Lead in Ceramic Industry
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박동욱/Park, Dong Wook
신용철/오세민/박승현/이나루/문영한/이광용/Shin, Yong Chul/Oh, Se Min/Park, Seung Hyun/Lee, Na Roo/Moon, Young Hahn/Yi, Gwang Yong
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Abstract
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In some ceramic industries, worker exposure to dust, crystalline free silica and lead were determined and evaluated. The conclusions are as follows.
1. Crystalline silica in bulk samples was 10.5 % in sanitary ware industry, 9.4 % in tile industry, and 2.1 % in ceramic insulator industry respectively. The free silica content of air filter sample was 8.03 % in table ware industry, 5.59 % in sanitary ware industry, and 1.32 % in ceramic insulator industry. Because silica content in ceramic dust is relatively high, it is should be considered silica as important factor in evaluating for ceramic industry.
2. The silica contents in dust from tile, sanitary ware and table ware industries are above 5%, it should be classified as $quot;Type$quot; 2 dust.
3. The airborne concentration of respirable crystalline silica was 27.9 ㎍/㎥ in a sanitary ware factory and 5.8 ㎍/㎥ in a ceramic insulator factory. Three of ten samples sampled the above factories were exceeded the occupational exposure levels, 100 ㎍/㎥.
4. Geometric mean(GM) of total dust in 11 factories was 1.00 ㎍/㎥, and GM of respirable dust concentration in 5 factories was 0.33 ㎍/㎥, Sanitary ware industry had the highest concentration of total dust, 1.62 ㎍/㎥, and of respirable dust, 0.88 ㎍/㎥.
5. Average lead concentration in air was 0.05 ㎍/㎥ in glazing process of 2 factories manufacturing table ware. Five of ten sample(50%) were exceeded 0.05 ㎍/㎥. Therefore lead exposure in pottery industry should be considered as important problem.
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