Spatiotemporal, Morphological and Source Analysis of Ultrafine Particulates (PM1) over Bengaluru, Karnataka, India

Measurement and analysis of Particulate Matter of aerodynamic diameter less than 1µm (PM1) has been carried out using indigenously built air sampler at the following locations of Bengaluru city: Basavanagudi (BAS), Domlur (DOM), Hosur road (HOS) and DC Halli (DCH). The PM1mass concentrations were observed to vary from 20.16 µg/m3 to 68.64 µg/m3 during the study period. The highest mass concentration of 68.64 µg/m3 was observed for the location BAS and the lowest mass concentration of 20.16 µg/m3 was observed for the location DOM. The average mass concentration of PM1 around Bengaluru for winter, summer, monsoon & post monsoon season is observed to be 47.60 µg/m3, 40.24 µg/m3, 30.85 µg/m3 and 38.76 µg/m3 respectively. Some of the collected samples showed the presence of microorganism such as bacillus. Elemental composition analysis showed the presence of non-metals Carbon, Oxygen, Nitrogen, Sulphur and traces of metals such as Sodium, Aluminium, Calcium and Potassium.