Indoor outdoor relationship of fine particles (pm2.5) in school classroom
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Date
2017-06
Authors
Muhamad Al-Amin Bin Kamaruddin
Journal Title
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Abstract
People spend about 90 % of their lifetime indoors and indoor air pollution is one of the
most harmful environmental factors for human health. Studies have shown that there is
significant relationship between indoor air quality (IAQ) status with surrounding
activities. In this study, PM2.5 concentration was monitored during teaching and
learning session from 8.00 a.m. to 2.00 p.m. at two primary schools exposed to
different major expected sources that are industry (Sekolah Kebangsaan Sungai Kechil)
and mobile (Sekolah Kebangsaan Khir Johari) sources. The effect of building design
towards the intrusion of outdoor PM2.5 into the indoor air quality in classroom was
investigated. In each school, two rooms have been selected based on the type of
window that is installed in a room with a window that uses a louvre and sliding
window. The average of PM2.5 concentration in classroom with louvre window (CLW)
and classroom with sliding window (CSW) were obtained which for SK Sungai Kechil
(value for CLW and CSW) were 13 µg/m³ and 35 µg/m³ while for SK Khir Johari
(value for CLS and CSW) were 27 µg/m³ and 37 µg/m³. Results shows that there exist
statistically significant differences (p-value <0.05) of parameter indoor and outdoor
PM2.5 concentration between these two schools. As a conclusion, the influence from the
surrounding activities and indoor sources are important in contributing on indoor
concentrations of pollutants in school classroom