Concentrations of PM₁₀ and airborne bacteria in daycare centers in Seoul relative to indoor environmental factors and daycare center characteristics

详细信息    查看全文

• 作者：Sung Ho Hwang ; Im Soon Kim ; Wha Me Park
• 关键词：PM10 ; Airborne bacteria ; Daycare centers ; Indoor environmental factors ; Air purifier
• 刊名：Air Quality, Atmosphere & Health
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：10
• 期：2
• 页码：139-145
• 全文大小：
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environmental Health; Atmospheric Protection/Air Quality Control/Air Pollution; Health Promotion and Disease Prevention;
• 出版者：Springer Netherlands
• ISSN：1873-9326
• 卷排序：10

文摘

The purpose of this study was to measure concentrations of PM₁₀ and airborne bacteria (AB) to determine how each one of them correlated with particular indoor environmental factors and characteristics of daycare centers in Seoul, South Korea.PM₁₀ and AB were sampled in 330 daycare centers in the middle of a classroom, along with measurements of temperature and relative humidity. Spearman’s correlation and Mann-Whitney analyses were used to examine the relationship among and differences between PM₁₀ concentration, AB concentration, indoor environmental factors, and daycare center characteristics.There were significant correlations between PM₁₀ concentration and AB concentration (r = 0.128, p < 0.05), temperature (r = 0.153, p < 0.01), and relative humidity (r = 0.185, p < 0.01). PM₁₀ concentrations with two or more windows; a heating, ventilation, and air conditioning (HVAC) system; and the use of air purifier were lower than concentrations with one window, window ventilation only, and no air purifier. AB concentrations were significantly higher when daycare centers had only one window and used only window ventilation (p < 0.05).Though there are many uncontrollable outdoor environmental factors that influence air quality, we demonstrated that using an HVAC system and an air purifier significantly reduces PM₁₀ concentrations and is a practical change that could be implemented to improve the indoor air quality of daycare centers.