Characterization and source apportionment of particle number concentration at a semi-urban tropical environment

Firoz Khan, Mohd Talib Latif, Norhaniza Amil, Ju Neng Liew, Noorlin Mohamad, Mohd Shahrul Mohd Nadzir, Hossain Mohammed Syedul Hoque

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Principal component analysis (PCA) and correlation have been used to study the variability of particle mass and particle number concentrations (PNC) in a tropical semi-urban environment. PNC and mass concentration (diameter in the range of 0.25–>32.0 μm) have been measured from 1 February to 26 February 2013 using an in situ Grimm aerosol sampler. We found that the 24-h average total suspended particulates (TSP), particulate matter ≤10 μm (PM<inf>10</inf>), particulate matter ≤2.5 μm (PM<inf>2.5</inf>) and particulate matter ≤1 μm (PM<inf>1</inf>) were 14.37 ± 4.43, 14.11 ± 4.39, 12.53 ± 4.13 and 10.53 ± 3.98 μg m<sup>−3</sup>, respectively. PNC in the accumulation mode (<500 nm) was the most abundant (at about 99 %). Five principal components (PCs) resulted from the PCA analysis where PC1 (43.8 % variance) predominates with PNC in the fine and sub-microme tre range. PC2, PC3, PC4 and PC5 explain 16.5, 12.4, 6.0 and 5.6 % of the variance to address the coarse, coarser, accumulation and giant fraction of PNC, respectively. Our particle distribution results show good agreement with the moderate resolution imaging spectroradiometer (MODIS) distribution.

Original languageEnglish
Pages (from-to)13111-13126
Number of pages16
JournalEnvironmental Science and Pollution Research
Volume22
Issue number17
DOIs
Publication statusPublished - 1 May 2015

Fingerprint

tropical environment
Particulate Matter
Principal component analysis
Principal Component Analysis
Satellite Imagery
Aerosols
particulate matter
Imaging techniques
principal component analysis
source apportionment
particle
MODIS
sampler
aerosol

Keywords

  • Aerosol size distribution
  • Back trajectory
  • Diurnal variation
  • Fire hotspot
  • Particle number
  • PCA-MLR

ASJC Scopus subject areas

  • Environmental Chemistry
  • Health, Toxicology and Mutagenesis
  • Pollution

Cite this

Characterization and source apportionment of particle number concentration at a semi-urban tropical environment. / Khan, Firoz; Latif, Mohd Talib; Amil, Norhaniza; Liew, Ju Neng; Mohamad, Noorlin; Mohd Nadzir, Mohd Shahrul; Hoque, Hossain Mohammed Syedul.

In: Environmental Science and Pollution Research, Vol. 22, No. 17, 01.05.2015, p. 13111-13126.

Research output: Contribution to journalArticle

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