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https://ptsldigital.ukm.my/jspui/handle/123456789/499739Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Md Firoz Khan, Dr. | - |
| dc.contributor.author | Norhaniza Amil (P57495) | - |
| dc.date.accessioned | 2023-10-13T09:34:13Z | - |
| dc.date.available | 2023-10-13T09:34:13Z | - |
| dc.date.issued | 2016-02-29 | - |
| dc.identifier.other | ukmvital:82177 | - |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/499739 | - |
| dc.description | Given the extensive body of scientific evidence on the effects of air pollution, fine particle seems to do more harm to human health than the coarse particle. Therefore, this study comprehensively explores the characterization and source apportionment of fine particulate matter (PM2.5) in the Klang Valley urban-industrial environment for a complete Malaysia's four seasonal perspectives. Two methods were employed with first approach on gravimetric method using high volume sampler for PM2.5 mass and chemical composition (one year sampling, n=94). Second approach was continuous monitoring on particle number concentration (PNC) using environmental dust monitor (GRIMM 365) covering particle diameter (Dp) betwen 0.265 and 34 μm (seven months monitoring, 1 min interval, n=272591). The results reveal that PM2.5 mass concentration for all seasons except North-East monsoon showed more than 50% exceedance of the daily World Health Organisation (WHO) and European Union (EU) air quality standards. Chemical compositions exposed that both primary and secondary pollutants of PM2.5 are equally important, albeit with seasonal variability. Five factors were identified from source apportionment analysis with varies relative contribution for different season. Mixed secondary inorganic aerosol (SIA) and biomass burning is the biggest factor. On an annual scale, PM2.5 mass correlated positively with temperature (T) and wind speed (WS) but negatively with relative humidity (RH). With an exception of NOx, the gases analysed (CO, NO2, NO, SO2) were found to significantly (p < 0.05) influence the PM2.5 mass. In relation to meteorological-gaseous parameters, PM2.5 sources were influenced by different parameters during different seasons. Further, backward trajectory demonstrate that trans-boundary sources could be crucial contributor during certain period. The PNC distribution showed that particles with Dp < 1 μm dominated the particle number count, mass and semi-volatile compound (SVC) fraction at the site. Particle with Dp > 2750 nm resulted with none or less than 1 cm-3. The mass of a particle distribution (dM/dlog(Dp)) however, does not show linear relationship with particle number distribution (dN/dlog(Dp)). The PNC source apportionment resulted with four factors, with biggest factor on particles with Dp range 0.265 - 1.45 μm. Both daily and diurnal correlations matrix shows that meteorological-gaseous influence significantly (p < 0.05) particles with Dp < 1.45 μm. Diurnal distribution strongly suggests an influence of traffic (motor vehicle emission). Size-segregated source apportionment resulted with PNC contribution decrease with bigger particle sizes for all five sources. In fact, particles with Dp < 0.5 μm covers 95% or more of particle number for all factors. Overall, this study reveal that fine particles (Dp < 2.5 μm) are very significant portion of particulate matter in the ambient air of the Klang Valley urban-industrial environment where changes in the environmental conditions have been reflected sensitively in aerosol distribution patterns.,Certification of Master's/Doctoral Thesis" is not available | - |
| dc.language.iso | eng | - |
| dc.publisher | UKM, Bangi | - |
| dc.relation | Faculty of Science and Technology / Fakulti Sains dan Teknologi | - |
| dc.rights | UKM | - |
| dc.subject | Apportionment | - |
| dc.subject | Fine particles | - |
| dc.subject | Environmental conditions | - |
| dc.subject | Klang Valley | - |
| dc.subject | Dissertations, Academic -- Malaysia | - |
| dc.title | Characterization and source apportionment of fine particulate matter in the Klang Valley urban environment | - |
| dc.type | Theses | - |
| dc.format.pages | 175 | - |
| dc.identifier.barcode | 002292(2016) | - |
| Appears in Collections: | Faculty of Science and Technology / Fakulti Sains dan Teknologi | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_82177+SOURCE1+SOURCE1.0.PDF Restricted Access | 563.48 kB | Adobe PDF |  View/Open |
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