논문 상세보기
pp.156-165
This study was undertaken to investigate whether HEPA filter-equipped air purifiers can remove aerosolized virus, whether the removed virus can re-scatter through the filter, and how long the removed virus keeps its infectivity in the filter. For this investigation, six HEPA filter-equipped air purifiers produced by different companies were tested against PhiX174 and MS2 phages aerosolized by nebulizers. For viral detection from the air, LB agar plates covered with Escherichia coli hosts and an Andersen air sampler were used, and from the surface, the swab method was used. Both the aerosolized PhiX174 and MS2 viruses absorbed by the HEPA filters in the air purifiers were not detected from the air through filters or the surface of the outlet of the air purifiers. During the operation of the air purifiers at medium mode, the infectious viral concentration of these viruses in the HEPA filters decreased to 0%~12.3% as the time period passed. These results regarding infectious viral concentration differences were assumed to be due to the different wind speed and air volume among the six air purifiers. Based on observations over 5 days, the infectious viral concentration of the PhiX174 phage was 8,600 times lower when the air purifier was operated than when it was not operated. Overall, our results demonstrate that HEPA filter-equipped air purifiers can efficiently remove the two aerosolized viruses and the removed viruses in the HEPA filter could not re-spread and maintain their infectivity.
1. 서 론
2. 재료 및 방법
2.1 공기청정기
2.2 공시 바이러스와 기주세균
2.3 기주세균 배양
2.4 바이러스 분사 용액 조제
2.5 공기청정기 필터에 바이러스의 분사
2.6 바이러스의 공기청정기 필터 유출 여부 조사
2.7 가동하는 공기청정기 필터에 존재하는 바이러스감염력(생존) 조사
3. 결과 및 고찰
3.1 시험 바이러스 검출 비교
3.2 공기청정기 가동시 고농도의 바이러스를 분사할경우 바이러스가 모두 공기청정기 헤파필터에 여과되는지 및 여과된 바이러스가 헤파필터를 통과하여유출되는지 여부 조사
3.3 헤파필터에 여과된 바이러스가 필터에서 얼마나오랜 기간 감염력을 유지하는지 조사
4. 결 론
References
