Spatial distribution of fine and coarse particulate matter during a southwest monsoon in Peninsular Malaysia

Othman, Murnira and Latif, Mohd Talib and Jamhari, Anas Ahmad and Abd Hamid, Haris Hafizal and Uning, Royston and Khan, Md Firoz and Nadzir, Mohd Shahrul Mohd and Sahani, Mazrura and Wahab, Muhammad Ikram Abdul and Chan, Kok Meng (2021) Spatial distribution of fine and coarse particulate matter during a southwest monsoon in Peninsular Malaysia. Chemosphere, 262. ISSN 0045-6535, DOI

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This study aimed to determine the spatial distribution of PM2.5 and PM10 collected in four regions (North, Central, South and East Coast) of Peninsular Malaysia during the southwest monsoon. Concurrent measurements of PM2.5 and PM(10 )were performed using a high volume sampler (HVS) for 24 h (August to September 2018) collecting a total of 104 samples. All samples were then analysed for water soluble inorganic ions (WSII) using ion chromatography, trace metals using inductively coupled plasma-mass spectroscopy (ICP-MS) and polycyclic aromatic hydrocarbon (PAHs) using gas chromatography-mass spectroscopy (GC-MS). The results showed that the highest average PM2.5 concentration during the sampling campaign was in the North region (33.2 +/- 5.3 mu g m(-3)) while for PM10 the highest was in the Central region (38.6 +/- 7.70 mu g m(-3)). WSII recorded contributions of 22% for PM2.5 and 20% for PM10 mass, with SO42- the most abundant species with average concentrations of 1.83 +/- 0.42 mu g m(-3) (PM2.5) and 2.19 +/- 0.27 mu g m(-3) (PM10). Using a Positive Matrix Factorization (PMF) model, soil fertilizer (23%) was identified as the major source of PM2.5 while industrial activity (25%) was identified as the major source of PM10. Overall, the studied metals had hazard quotients (HQ) value of <1 indicating a very low risk of non-carcinogenic elements while the highest excess lifetime cancer risk (ELCR) was recorded for Cr VI in the South region with values of 8.4E-06 (PM2.5) and 6.6E-05 (PM10). The incremental lifetime cancer risk (ILCR) calculated from the PAH concentrations was within the acceptable range for all regions. (C) 2020 Elsevier Ltd. All rights reserved.

Item Type: Article
Funders: Universiti Kebangsaan Malaysia[GUP-2018-109], Universiti Kebangsaan Malaysia[DIP-2019-006]
Uncontrolled Keywords: PM2.5;PM10;Peninsular Malaysia;Source apportionment;Chemical composition
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science
Depositing User: Ms Zaharah Ramly
Date Deposited: 13 Sep 2022 02:14
Last Modified: 13 Sep 2022 02:14

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