Long Range Transport of Anthropogenic Pollution in Bangladesh
Trans-boundary transport of air pollution has been an issue of increasing importance over the past several decades. Long-range transport of anthropogenic pollution is contrasted with that of pollution produced by natural processes such as dust storms, and natural forest fires concentrations. Airborne particulate matter datasets covering the period from 1997 to 2015 from the Dhaka, Bangladesh were used to find the source areas that are primarily responsible for long range transported pollutants. All samples were collected with the same sampler and follow the same technique for mass and BC measurements. The samples were analyzed for elemental concentrations using both Proton Induced X-ray Emission (PIXE) and X-Ray Fluorescence techniques. It was found that high fine soil contributions were from dust storms. On the other hand, smoke in this region mainly comes from Northern India where they often burn agricultural waste. These trans-boundary contributions help to increase the local contribution.