Journal of Korean Society of Occupational and Environmental Hygiene (한국산업보건학회지)

Korean Industrial Hygiene Association (한국산업보건학회)
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Releasing of asbestos fibers from the weathered asbestos cement slate roofing

슬레이트 지붕 노후화에 따른 석면 섬유 방출량

  • Kim, Hyun-Wook (Dept. of Prev. Med., College of Medicine, The Catholic University of Korea) ;
  • Park, Gye-Young (Graduate School of Public Health, The Catholic University of Korea) ;
  • Han, Jin-Gu (Catholic Institute of Industrial Medicine Center, St. Mary Hospital) ;
  • Han, Young-Sun (Catholic Institute of Industrial Medicine Center, St. Mary Hospital) ;
  • Hwang, Bum-Gu (Korea Testing & Research Institute) ;
  • Lee, Jun-Hyuk (Graduate School of Public Health, The Catholic University of Korea)
  • 김현욱 (가톨릭대학교 의과대학 예방의학교실) ;
  • 박계영 (가톨릭대학교 보건대학원) ;
  • 한진구 (성모병원 산업의학센터) ;
  • 한영선 (성모병원 산업의학센터) ;
  • 황범구 (한국화학시험연구원) ;
  • 이준혁 (가톨릭대학교 보건대학원)
  • Received : 2009.10.19
  • Accepted : 2010.06.16
  • Published : 2010.06.30
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Abstract

To confirm and quantify asbestos fibers released from the asbestos-cement slate roofs due to weathering, three houses, selected based on the year of built - 60's, 70, and 80's, were investigated. All of them were located in the downtown of Seoul. Rain or snow-melt water was collected from the roof in a 3.5 liter plastic bottle. A known amount of collected water was filtered on the 37 mm membrane filter, ashed in a muffle furnace, and subsequently treated with HCl to remove organic material. The treated remaining was refiltered on a 25mm membrane filter for PLM and PCM analyses. The NIOSH 7400 method was utilized for PCM counting. In addition, SEM/EDX was used to confirm the asbestos types. The results of this study showed that chrysotile fibers were confirmed by PLM in all samples analyzed. A significant amount of asbestos fibers were found in the water samples. The ranges of asbestos fibers counted from the samples collected in the 60's, 70's, and 80's were; 10,406.3~55,575.6 f/L, 5,218.8~38,126.2 f/L, and 2,906.3~7,798.6 f/L, respectively. As anticipated, concentrations of asbestos fibers increased with time of installment of the roofing material. We conclude that weathering can be a significant factor on the release of asbestos fibers from the asbestos cement products. Since asbestos fibers released into environment can be a source of significant health hazard, countermeasures, such as replacement, removal, and encapsulation of weathered asbestos slate, should be initiated immediately.

Keywords

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