Qualitative source apportionment and long-range transport of air pollutants
J. A. Saju1,2*, Q. H. Bari2, S. B. Nayan2, M. M. Rahman2
- Urban areas of Bangladesh are under threat due to the extensiveness of air pollution.
- Source identification of air pollutants is a crucial element of controlling the pollution.
- Qualitative source apportionment and long-range transport of air pollutants are conducted.
- Anthropogenic sources are highly responsible for polluting the air of Khulna
- Trajectory path reveals the origins of air pollutants traveled over Khulna city.
Air pollution is a great concern in urban areas of Bangladesh because of the emissions from various anthropogenic sources. Identification of sources of respective air pollutants is needed to control the affluence of pollution. The aim of this study was to ascertain the possible sources which are polluting the airshed of Khulna city. This study performed qualitative source apportionment and investigated the long-range transport of air pollutants at different locations of the city. Nine locations were selected to investigate the sources of pollutants through observation-identification method. Vehicle emission was found as a dominant source of air pollutants at almost all the observed locations. Average ratio of PM2.5/PM10 was found as 0.66 which varied from 0.38 to 0.88 and average PM1.0 /PM10 was found as 0.35 varied from 0.16 to 0.44. These ratios revealed the dominancy of fine particles as on average 66% of PM2.5 and 35% of PM1.0 contributed to the total concentration of PM10. The extensive aspect of fine particles revealed the greater contribution of anthropogenic sources to the air of Khulna city as around 66% of fine particles found to be contributed to the concentration of PM10. This study also investigated the long-range transport of air pollutants for nine monitoring locations in the city. From the backward trajectory analysis, it was concluded that trajectories followed two paths; one is west Bengal path and another is the Bay of Bengal path. The higher concentration of all air pollutants was found when the trajectories followed the west Bengal path which indicated the contribution of industrial activities in neighboring India, China and Bhutan to the concentrations of air pollutants behind the perimeter of Bangladesh.
© 2021 The Authors. Published by Ababil Publishers.
To cite this article: Saju JA, Bari QH, Nayan SB, Rahman MM. Qualitative source apportionment and long-range transport of air pollutants. Journal of Advanced Civil Engineering Practice and Research 2021;12:2-10.
To link this article: http://ababilpub.com/download/jacepr12-2/
© 2021 The Authors. Licensee Ababil Publishers, Kuala Lumpur, Malaysia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).