투과전자현미경을 이용한 공원 조경석 중 자연발생석면의 형태 및 크기 분포
Morphology and Size Distribution of Naturally Occurring Asbestos using TEM in Landscape Rock in Parks
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초록
This study provided data that can be used to discriminate asbestiform and non-asbestiform amphiboles containedin landscaping rocks in recreational parks. The length and width of fibers being at least 5 μm long andwith a minimum aspect ratio of 3:1 were measured using a transmission electron microscope and comparedto an asbestos reference sample. The park samples were thicker than 1 μm (average 1.9 μm), while the Healthand Safety Executive (HSE) reference sample averaged 0.3 μm in width, with 100% being thinner than 1.0 μm. The average aspect ratios were 7.1 for the park samples and 67.1 for the HSE reference sample. Based on thesedistributions, the amphibole fibers in sampled landscape rocks were thicker and had a lower aspect ratio thanthe reference sample. These results suggest that actinolite fibers in sampled landscape rocks cannot be classifiedinto commercial-grade asbestos. This study can contribute to public policy for managing and controllinglandscaping rocks containing naturally occurring asbestos (NOA) and be used to communicate the possibleresulting health risks.
Abstract
This study provided data that can be used to discriminate asbestiform and non-asbestiform amphiboles containedin landscaping rocks in recreational parks. The length and width of fibers being at least 5 μm long andwith a minimum aspect ratio of 3:1 were measured using a transmission electron microscope and comparedto an asbestos reference sample. The park samples were thicker than 1 μm (average 1.9 μm), while the Healthand Safety Executive (HSE) reference sample averaged 0.3 μm in width, with 100% being thinner than 1.0 μm. The average aspect ratios were 7.1 for the park samples and 67.1 for the HSE reference sample. Based on thesedistributions, the amphibole fibers in sampled landscape rocks were thicker and had a lower aspect ratio thanthe reference sample. These results suggest that actinolite fibers in sampled landscape rocks cannot be classifiedinto commercial-grade asbestos. This study can contribute to public policy for managing and controllinglandscaping rocks containing naturally occurring asbestos (NOA) and be used to communicate the possibleresulting health risks.
참고문헌 (18)
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