Open AccessIdentification of Indoor Air Quality (IAQ) Sources in Libraries through Principal Component Analysis (PCA)
Author(s) -
Amalina Abu Mansor,
S Shamsul,
Samsuri Abdullah,
Nazri Che Dom,
Nur Nazmi Liyana Mohd Napi,
Ali Najah Ahmed,
Marzuki Ismail
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1144/1/012055
Subject(s) - indoor air quality , environmental science , particulates , ventilation (architecture) , air quality index , principal component analysis , relative humidity , air pollution , environmental engineering , environmental chemistry , meteorology , chemistry , computer science , artificial intelligence , physics , organic chemistry
Indoor air quality (IAQ) is an important role in affecting visitors and staffs’ health in library. However, good ventilation and suitable types of furniture materials in the indoor environment were important to preserve better indoor air quality for the occupants. In this study, the status of indoor air pollution using in-situ measurement for chemical and physical parameters had been examined. The chemical parameters measured were formaldehyde (CH2O, ppm), carbon monoxide (CO, ppm), carbon dioxide (CO 2 ), fine particulate matter (PM2.5, mg/m 3 ) and coarse particulate matter (PM 10 , mg/m 3 ). The physical parameters such as relative humidity (RH, %), temperature (T, °C) and air movement (AM, m/s) were also measured. The dominant sources of IAQ had been determined by using Principal Component Analysis (PCA). Principle Component (PC-2, S1) and PC-1 (S2) (CO, CO 2 and CH 2 O) have become the indicator for chemical contaminants and the number of occupants that present in the library. The main contributor of indoor air quality at both areas was thermal comfort, which contributed 56.146% (PC-3, S1) and 60.76% (PC-4, S2). In conclusion, air quality in the libraries was affected by surrounding activities, ventilation performance and physical parameters.