Dispersion Pattern of PM10, PM2.5 and PM1.0 in and around an Opencast Coal Mine Using Statistical and Gaussian Emission Models
摘要
Aerodynamic particles or fugitive dust are the fine coal or rock fragments from various surface mining operations. The study identified various sources of fugitive dust emission, estimated suspended particulate matter emission rates, and estimated concentration levels at 100 m distance using a Gaussian emission model filtering upwind source. The study conducted an experimental analysis of total suspended particulate matter concentrations from November, 2021 to June,2023 at 23 locations which include 18 industrial areas and 5 residential colonies, using a High Volume Air Sampler to monitor air quality. The experimental data when compared with predicted data showed quite appreciable results. Experimental analysis was carried out to monitor the concentrations of PM10, PM2.5 and PM1.0 during the same period at the monitoring stations using HCT’s Model PM-101P Particulate Matter’s Monitor, ver. 1.0 for assessing real time air quality. Using these data, site specific mathematical relationships between the concentrations of PM2.5 and PM1.0 with PM10 were established using statistical analysis. The isopleths of distribution of particulate matters of varying size during winter and summer were visualized in and around the mining area using the software Surfer 8.0. The study revealed that the haul road contributes maximum particulate matters among all other sources in the atmosphere.