Studying effects of emissions from thermal power plants on ambient air quality in Cam Pha city

The article presents some research results on assessing emissions from the chimneys of Cam Pha, Mong Duong 1 and Mong Duong 2 thermal power plants through comparison of the concentrations of TSP, SO2 and NOx with national and local standards on industrial emissions (QCVN 22:2009/BTNMT, QCDP 5:2020/QN), and applying AERMOD VIEW 10.2.1 software to simulate pollutant dispersions in order to evaluate the effects of this emission on ambient air quality in Cam Pha city. The research results show that at several times, the emission concentrations of all three parameters of TSP, NOx và SO2 were higher than standard values, with the maximum frequencies of exceeding standard were 2,79%, 25,92% and 8%, respectively. The maximum levels of exceeding standard were 4,29 times for TSP, 4,04 times for NOx and 7,17 times for SO2. The research results also indicate that there is a place where the hourly average concentration of NO2 is 2.7 times higher than the local standard QCDP 4:2020/QN on ambient air quality. The simulation results of pollutant dispersions showed that the area in the west-northwest of Mong Duong 1 and 2 thermal power plants has concentrations of SO2 and NO2 (hourly average) exceeding the current allowable standards.