Characteristics and source apportionment of Black Carbon (BC) in a suburban area of Klang Valley, Malaysia
Black carbon (BC) is of concern due to its contribution to poor air quality and its adverse effects human health. We carried out the first real-time monitoring of BC in Malaysia using an AE33 Aethalometer. Measurements were conducted between 1 January and 31 May 2020 in a university area in a suburb...
| Main Authors: | , , , , , |
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| Format: | Article |
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Multidisciplinary Digital Publishing Institute
2021
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| Online Access: | http://psasir.upm.edu.my/id/eprint/96345/ |
| _version_ | 1848862342126764032 |
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| author | Ezani, Nur Eliani Dhandapani, Sairam Heal, Mathew R. Praveena, Sarva Mangala Khan, Md Firoz Ramly, Zamzam T. A. |
| author_facet | Ezani, Nur Eliani Dhandapani, Sairam Heal, Mathew R. Praveena, Sarva Mangala Khan, Md Firoz Ramly, Zamzam T. A. |
| author_sort | Ezani, Nur Eliani |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Black carbon (BC) is of concern due to its contribution to poor air quality and its adverse effects human health. We carried out the first real-time monitoring of BC in Malaysia using an AE33 Aethalometer. Measurements were conducted between 1 January and 31 May 2020 in a university area in a suburban location of the Klang Valley. The measurement period coincided with the implementation of a movement control order (MCO) in response to COVID-19. The mean concentration of BC before the MCO was 2.34 µg/m3 which decreased by 38% to 1.45 µg/m3 during the MCO. The BC is dominated by fossil-fuel sources (mean proportion BCff = 79%). During the MCO, the BCff concentration decreased by more than the BCbb concentration derived from biomass burning. BC and BCff show very strong diurnal cycles, which also show some weekday–weekend differences, with maxima during the night and just before noon, and minima in the afternoon. These patterns indicate strong influences on concentrations from both traffic emissions and boundary layer depth. BC was strongly correlated with NO2 (R = 0.71), another marker of traffic emission, but less strongly with PM2.5 (R = 0.52). The BC absorption Ångström exponent (AAE) ranged between 1.1 and 1.6. We observed pronounced diurnal cycles of lower AAE in daytime, corresponding to BCff contributions from traffic. Average AAE also showed a pronounced increase during the MCO. Our data provides a new reference for BC in suburban Malaysia for the public and policy-makers, and a baseline for future measurements. |
| first_indexed | 2025-11-15T13:15:30Z |
| format | Article |
| id | upm-96345 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T13:15:30Z |
| publishDate | 2021 |
| publisher | Multidisciplinary Digital Publishing Institute |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-963452023-01-30T06:53:16Z http://psasir.upm.edu.my/id/eprint/96345/ Characteristics and source apportionment of Black Carbon (BC) in a suburban area of Klang Valley, Malaysia Ezani, Nur Eliani Dhandapani, Sairam Heal, Mathew R. Praveena, Sarva Mangala Khan, Md Firoz Ramly, Zamzam T. A. Black carbon (BC) is of concern due to its contribution to poor air quality and its adverse effects human health. We carried out the first real-time monitoring of BC in Malaysia using an AE33 Aethalometer. Measurements were conducted between 1 January and 31 May 2020 in a university area in a suburban location of the Klang Valley. The measurement period coincided with the implementation of a movement control order (MCO) in response to COVID-19. The mean concentration of BC before the MCO was 2.34 µg/m3 which decreased by 38% to 1.45 µg/m3 during the MCO. The BC is dominated by fossil-fuel sources (mean proportion BCff = 79%). During the MCO, the BCff concentration decreased by more than the BCbb concentration derived from biomass burning. BC and BCff show very strong diurnal cycles, which also show some weekday–weekend differences, with maxima during the night and just before noon, and minima in the afternoon. These patterns indicate strong influences on concentrations from both traffic emissions and boundary layer depth. BC was strongly correlated with NO2 (R = 0.71), another marker of traffic emission, but less strongly with PM2.5 (R = 0.52). The BC absorption Ångström exponent (AAE) ranged between 1.1 and 1.6. We observed pronounced diurnal cycles of lower AAE in daytime, corresponding to BCff contributions from traffic. Average AAE also showed a pronounced increase during the MCO. Our data provides a new reference for BC in suburban Malaysia for the public and policy-makers, and a baseline for future measurements. Multidisciplinary Digital Publishing Institute 2021 Article PeerReviewed Ezani, Nur Eliani and Dhandapani, Sairam and Heal, Mathew R. and Praveena, Sarva Mangala and Khan, Md Firoz and Ramly, Zamzam T. A. (2021) Characteristics and source apportionment of Black Carbon (BC) in a suburban area of Klang Valley, Malaysia. Atmosphere, 12 (6). art. no. 784. pp. 1-11. ISSN 2073-4433 https://www.mdpi.com/2073-4433/12/6/784 10.3390/atmos12060784 |
| spellingShingle | Ezani, Nur Eliani Dhandapani, Sairam Heal, Mathew R. Praveena, Sarva Mangala Khan, Md Firoz Ramly, Zamzam T. A. Characteristics and source apportionment of Black Carbon (BC) in a suburban area of Klang Valley, Malaysia |
| title | Characteristics and source apportionment of Black Carbon (BC) in a suburban area of Klang Valley, Malaysia |
| title_full | Characteristics and source apportionment of Black Carbon (BC) in a suburban area of Klang Valley, Malaysia |
| title_fullStr | Characteristics and source apportionment of Black Carbon (BC) in a suburban area of Klang Valley, Malaysia |
| title_full_unstemmed | Characteristics and source apportionment of Black Carbon (BC) in a suburban area of Klang Valley, Malaysia |
| title_short | Characteristics and source apportionment of Black Carbon (BC) in a suburban area of Klang Valley, Malaysia |
| title_sort | characteristics and source apportionment of black carbon (bc) in a suburban area of klang valley, malaysia |
| url | http://psasir.upm.edu.my/id/eprint/96345/ http://psasir.upm.edu.my/id/eprint/96345/ http://psasir.upm.edu.my/id/eprint/96345/ |