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KMID : 0895420080180040262
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Journal of Korean Society of Occupational and Enviromental Hygiene
2008 Volume.18 No. 4 p.262 ~ p.270
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Indoor Air Concentration of Particulate Matter and Endotoxin in Public Facilities
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Jeon Byung-Hak
Hwang Yu-Kyung
Kim Hyoung-Ah
Lee Se-Hoon
Ahn Kyu-Dong
Heo Yong
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Abstract
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This study was conducted to measure concentrations of particulate matter (PM10, PM2.5) and endotoxin in thirty public facilities (7 elderly-care facilities, 4 hypermarkets, 4 university hospitals, 7 child-care facilities, 4 subway stations and 4 bus terminals) from September 2004 to February 2007 in Seoul and Gyeonggi-do province. PM10 or PM2.5 was measured with glass fiber filter and mini volume air sampler for 6 to 8 hours in indoor and outdoor of the facilities and expressed as ㎍/㎥. After weighing the filter, endotoxin was analyzed by Limulus Ameobocyte Lysate method (EU/㎥). PM10 in indoor air was higher (GM and GSD was 78.00 and 1.92 ㎍/㎥, respectively) than the outdoor air (GM and GSD was 60.70 and 2.23 ㎍/㎥, respectively, I/O=1.28). All measurements was not exceeded the national maintenance standard. Elderly-care and child-care facilities showed relatively higher concentrations (83.27 ㎍/㎥ and 81.75㎍/㎥; I/O=2.01 and 1.19, respectively) than hypermarkets or university hospitals. The highest PM2.5 was seen in child-care facilities (62.15 ㎍/㎥, I/O=2.42). The I/O of the endotoxin in the PM10 and the PM2.5 was exceeded 1.0 (1.37 and 1.57, respectively). Indoor PM10 was affected by user/day and humidity, and endotoxin in the PM10 was affected by temperature. In conclusion, elderly- and child-care facilities are high priority facilities to be improved indoor air quality.
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KEYWORD
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Indoor air, Public facilities, Particulate matter, Endotoxin
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