Status of Air Quality and Survey of Particulate Matter Pollution in Pabna City, Bangladesh (original) (raw)
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The objectives of this work were to monitor and quantify the airborne particles (PM<sub>10</sub> and PM<sub>2.5</sub>) and to<br />predict the influence of human and natural activities on their ambient concentrations. Samples of Air-borne<br />Particulate Matter (APM) in the size range 0-2.5 μm (PM<sub>2.5</sub>) and 0-10 μm (PM<sub>10</sub>) were collected<br />simultaneously using two MiniVol portable air samplers at Mohakhali and Farmgate area in Dhaka city.<br />At Mohakhali effective sampling duration was from May 16 to May 23, 2004 and at Farmgate from June 6<br />to June 13, 2004. Continuous seven day monitoring was carried out to find the effect of meteorology, traffic<br />load and other anthropogenic activities on ambient Particulate Matter (PM) pollution level. Weekday and<br />weekend average traffic number was evaluated by field technicians at both sampling sites. These sites...
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Environmental Science and Pollution Research, 2016
Purpose-In order to reduce the health impacts of air pollution effectively, developing strategies that involves individual or community level is crucial. The purpose of this paper is to assess people's protective practices for inhalable particulate matter and its significant determinants such as general characteristics, knowledge and attitude among residents of an urban residential area, Dhaka, Bangladesh. Design/methodology/approach-This cross-sectional study was conducted by systematic random sampling. A total of 424 people, who lived in that area for not less than two years before the survey, were interviewed using a structured questionnaire. χ 2 and Fisher's exact test were used to analyze the data. Findings-Only a small proportion of respondents had high practice level. In addition, a little more than half has high level of knowledge about inhalable particulate matter, its adverse health effects and protective practices and almost 70 percent had high level of attitude toward air pollution. The protective practices for small inhalable particulate matter was significantly associated with age, educational level, occupation, knowledge and attitude toward small inhalable particulate matter, its adverse health effects and protective measures. Originality/value-A good level of knowledge about the prevailing air pollution and related health risks can be crucial to develop more focused attempt at changing the current situation with public participation. The environmental experts and health volunteer should disseminate precise and adequate information about long-term health hazards of particulate matter and measures of exposure prevention to improve the protective practices.
Characterization of Inhalable Ground-Level Ambient Particulate Matter in Dhaka City, Bangladesh
Journal of Scientific Research, 2020
The capital Dhaka of Bangladesh is one of the most densely populated and air polluted cities in the world. This study is aimed to assess the trend of Particulate Matter (PM2.5 and PM10) from 2013 to 2018 in relation to meteorological parameters. PM data were collected from the Continuous Air Monitoring Station (CAMS) at Darus Salam point in Dhaka city. CAMS gather air samples through beta gauge instrument which measures the volume of gas extracted through the stack/duct and calculates mass concentration. In the present study, PM2.5 was 54 % of that of PM10 which is fine particulate matter. PM2.5 and PM10 had the lowest concentration in the month of July due to the highest rainfall rate whereas it was highest in the months of January and December. In addition, annual average concentration of PM2.5 and PM10 is observed to be 5-6 times higher than Bangladesh National Ambient Air Quality Standard (BNAAQS) while higher PM concentrations were observed in winter seasons. This study found s...
Airborne Particulate Pollution Measured in Bangladesh from 2014 to 2017
Aerosol and Air Quality Research, 2019
Recently, the World Health Organization ranked Narayanganj, Chittagong, and Dhaka among the top 25, 40, and 45 cities, respectively, for high ambient PM 2.5 concentrations. Bangladesh has instituted an air quality monitoring system operated by the Department of Environment. PM 2.5 and PM 10 were measured hourly from January 2014 through December 2017 in Dhaka, Gazipur, Narayanganj, Chittagong, Sylhet, and Barisal. All sites registered concentrations for both pollutants that exceeded the 24-h Bangladesh National Ambient Air Quality Standards. The particulate matter (PM) concentrations varied significantly seasonally and with different diel patterns from city to city. The highest concentrations were observed during the winter, typically when wind speeds and mixed layer heights are low and pollutant concentrations are increased by transport from the northwest. The PM 2.5 concentrations from the 1 st quarters of 2014 and 2015 were compared to assess whether political unrest that appeared to reduce vehicular moment to very low levels affected the observed values. However, the PM 2.5 concentrations were statistically similar at the Dhaka, Narayanganj, and Sylhet sites and different for the Gazipur, Chittagong, and Barisal locations. Thus, the PM 2.5 concentrations during the political unrest in the 1 st quarter of 2015 were not consistently lower across the measurement sites. These results indicate that vehicular emission contributions to PM 2.5 concentrations are smaller than in the past, which agrees with recent source apportionment studies showing that brick kilns have become the dominant source of PM.
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MATEC Web of Conferences
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Open Journal of Air Pollution, 2018
Total suspended particulate matter (SPM) in the urban atmosphere of Dhaka city was collected using a high volume sampling technique for a period of one month (August 2017-September 2017). Chemical characterization of particulate matter (PM) was investigated, and characterized concerning the size distribution, morphological features such as count, total area, average size, perimeter, circularity, aspect ratio (AR), roundness; equivalent spherical diameter (ESD), surface area and volume of PM. The results of elemental analysis showed that the presence of heavy metal in PM was ten to hundred times higher than the standard value prescribed by WHO and USEPA. Several morphological analysis indicated that particles varying in shape from nearly spherical to various irregular shape, had higher surface energy, higher content of Cl and S bearing particles and had a large surface area which can cause greater damage to lungs. The presence of various organic compounds containing functional groups like alcohols, ketones aldehydes, carboxylic acids as well as unsaturated and saturated carbon bonds was observed by FT-IR analysis. Scanning Electron Microscopy (SEM) was used to characterize the morphology of the PM. Agglomerates and shoots type particles were mostly seen in SPM.
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