# 황사 발생시 아파트 실내에서 미세먼지 크기별 농도 특성

Joo, Sang-Woo;Ji, Jun-Ho
주상우;지준호

• Accepted : 2019.03.29
• Published : 2019.03.31
• 57 8

#### Abstract

It is recommended for the public to stay at home and to close the doors and windows when a high-particulate-matter environment such as a yellow sand event occurs outside. However, there are lack of empirical studies describing how much outdoor PM infiltrates into a closed house and how much indoor PM an inhabitant is exposed to during the period. In this study, the $PM_{10}$ and $PM_{2.5}$ were measured at the kitchen in an apartment house by an optical particle counter for 3 days including a yellow sand event. The outdoor PMs and the outdoor wind speeds were referred from surrounding weather stations. We analyzed the penetration of $PM_{10-2.5}$ and $PM_{2.5}$ at the test house against the outdoor wind speed supposed corresponding to the change of air exchange rate. In addition, the effect of an indoor activity on change in the indoor PM was investigated. In result, the indoor $PM_{10-2.5}$ was very low even a yellow sand event occurred outside; rather, a contribution of indoor activities to increase in $PM_{10-2.5}$ was higher. In contrast, the indoor $PM_{2.5}$ fluctuated following the outdoor $PM_{2.5}$ trend at high wind speeds or remained almost constant at low wind speed.

#### Keywords

Yellow sand (Asian dust);Apartment building;$PM_{10}$;$PM_{2.5}$;$PM_{10-2.5}$

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#### Acknowledgement

Supported by : 한국연구재단