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KMID : 1039220170270030163
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Journal of Korean Society of Occupational and Environmental Hygiene
2017 Volume.27 No. 3 p.163 ~ p.169
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Comparisons of Airborne Quartz Concentrationsin Mineral Dust Exposure Industries
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Jeong Gyeong-Seon
Bae Hye-Jeong
Nam Mi-Ran
Jung Jong-Hyeon
Phee Young-Gyu
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Abstract
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Objectives: This study was conducted toestimate quartz concentrations and contents in the airborne respirable dust from various industries.
Methods: A total of 818 samples were collected from 174 industries. Respirable dust samples were collected using a cyclone equipped with a 37 mm, 5 μm pore size PVC filter. The quartz concentrations were identified using the intensity of the absorption peak of quartz at 799 cm-1 by Fourie Transformed Infrared Spectroscopy(FTIR).
Results: The respective geometric means for quartz concentrations in the respirable dust were 0.0050, 0.0049, 0.0025, and 0.0019 mg/m³ in foundries, ceramics, construction, and cement/stone. The geometric mean of quartz contents analyzed by FTIR were respectively 3.43, 1.99, 1.04, and 0.82% for ceramics, foundries, cement/stone, and construction. The rate of exceeding the Korean Occupational Exposure Limit(0.05 mg/m³) was 2.03%, but rate of exceeding the American Conference of Governmental Industrial Hygienist(ACGIH) Threshold Limit Value(0.025 mg/m³) was 7.12%.
Conclusions: Given that foundries had a higher quartz concentration, there is a need to reduce respirable dust, such as through wet operation. In order to protect the health of workers exposed to mineral dust, it is necessary to actively consider strengthening the Korean Occupational Exposure Limit.
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KEYWORD
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concentration, quartz, respirable dust
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