논문 상세보기
pp.329-337
This study aims to analyze the effects of 4 directions of wind, wind speed, year of construction of slate roofs, installation area and other factors on the concentration and size distribution of airborne fiber particles in farmhouses with a slate roof containing asbestos. Airborne fiber particle samples were collected from the air in six houses with a slate roof containing asbestos using a high flow rate pump (10 L/min) for 2 hours, three times a day with a different condition, 72 times in total. The airborne fiber particle concentrations were measured using a phase contrast microscope, and the size of fiber particles of 72 samples in total was estimated using the mean value of those in each sample measured at 100 with a field of view. The total average concentration of fiber particles collected from in the air in four directions of the targeted farmhouses was 2.83 fiber/L, and its maximum concentration was 5.75 fiber/L, which means that among all samples there was no place that exceeded 10 fiber/L, a recommended indoor air quality standard. The average size of the fiber particles was 11.55 μm, and the maximum size was 40 μm. A multiple regression analysis of factors affecting the concentration and size of fiber particles in the air collected from the farmhouses with a slate roof containing asbestos found that the closer to the main wind direction (p<0.001) and the faster the average wind speed (p<0.05), the fiber particles concentration became significantly higher. In this case, the coefficient of determination was 52.8%. It was also found that the wider the total area of the slate roof (p<0.001) and the slower the average wind speed (p<0.05), the longer the fiber particles; the coefficient of determination for this finding was 19.6%. The concentration of fiber particles in the air of farmhouses with a slate roof appeared to be the highest under the main wind direction, and became significantly higher as the wind speed became faster. This proved that fiber particles were leaked from the slate roof. The size of the fiber particles became significantly longer as the area of the slate roof became wider and the wind speed became slower.
2. 대상 및 방법
2.1 조사기간 및 대상
2.2 채취 펌프
2.3 시료채취 및 분석방법
2.4 통계분석
3. 결 과
3.1 슬레이트 지붕을 가진 가옥의 풍향별 공기 중 섬유상 입자 농도와 크기 분포
3.2 슬레이트 지붕의 건축년도와 총 면적에 따른 공기중 섬유상 입자 농도와 크기 분포
3.3 슬레이트 지붕의 풍속에 따른 공기 중 섬유상 입자농도와 크기 분포
3.4 공기 중 섬유상 입자 농도에 영향을 미치는 요인들의 다변량회귀분석
3.5 공기 중 섬유상 입자 크기에 영향을 미치는 요인들의 다변량회귀분석
4. 고 찰
5. 결 론
References
