Paper Title
Characterization of Airborne Fine Particulate Matter (Pm2.5, Pm10) in Dusit District, Bangkok

Abstract
This research studies the Studying the absorption of dust particles of sizes 2.5 microns and 10 microns using Scanning Electron Microscopy (SEM) and studying Ability to Capture and Retain Airborne Fine Particulate Matter (PM 2.5, PM 10) on Pterocarpus macrocarpusleaves using Energy Dispersive Spectroscopy (EDS) in Dusit District, Bangkok Province. Studies have shown that Pterocarpus macrocarpusleaves are highly effective in trapping dust particles. Suitable for growing as a roadside tree. It can trap dust particles of 2.5 microns in size well. Moreover, the Pterocarpus macrocarpustree is a large tree with a large number of leaves per branch. It can be concluded that it has a high efficiency in trapping dust particles. For elemental analysis techniques (EDS: Energy Dispersive Spectroscopy). In the analysis of small dust particles. In Dusit, Bangkok Province for a period of 1 hour, 2 hours, and 3 hours. The results of the study were as follows: Oxygen and carbon were found. is the greatest number which is a component of carbon dioxide gas (CO2). In the Dusit area there are a lot of cars traveling, so it can be concluded that Small dust particles in the Dusit area Bangkok It comes from the smoke from passing cars. Keywords - Dust Particles, Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Pterocarpus macrocarpus leaves.