Ambient Concentration of Particulate Matter PM2.5 and Black Carbon: A Comparative Study of Two Different Locations in Dhaka City
Khurshida Begum1, Md. Mehedi Hasan2, Faisal Muhammad1, *, Md. Abdul Mottalib Sarkar2, Md. Safiur Rahman2, Bilkis Ara Begum2, Abul Hasan Baki Billah1, Salamat Khandker1, ASM Mohiuddin3
In South Asia, airborne particulate matter (PM10 and PM2.5) is a significant concern because of its high ambient concentrations and documented impact with respect to morbidity and premature mortality.
The study aimed to verify the data obtained from both the SR (semi-residential) and Darussalam monitoring sites.
Air Particulate Matter (APM) samples were collected from two locations in Dhaka. One is a semi-residential site (Atomic Energy Centre, Dhaka), and the other is the Darussalam site, Mirpur, Dhaka. In the semi-residential area, data collected between 2011 and 2018 were considered.
A year-wise comparison of the collected PM2.5 and BC (Black Carbon) samples has been shown. The eight-year average annual mean of PM2.5 mass concentration was above the national ambient air quality limit of 15 (µgm-3) for PM2.5. The mean yearly mass concentration of PM2.5 was much higher in 2011, 2016, and 2017. The semi-residential (SR) (OECD) site was with relatively more minor traffic, but the Darussalam site (CAMS-3) was with high traffic. As a result, BC at the Darussalam site was 32% of the total PM2.5. The BC value was about 25% of the total PM2.5 at the SR site, mainly of anthropogenic origin and predominately from transport-related sources. Due to the meteorological reason and long-range transport during the winter, the PM concentrations remain much higher than the Bangladesh Standard.
The industrial site is much more polluted than the residential site because high pollutant sources surround the industrial area, like brick kiln industries, chemical industries, and increased traffic.
* Address correspondence to this author at the Faisal Muhammad, Department of Public Health, Faculty of Allied Sciences, Daffodil International University, Ashulia, Dhaka, Bangladesh; E-mail: email@example.com