Evaluation of atmospheric pollution and estimation of remaining atmospheric environmental capacity in xuzhou city

Based on the data of air quality monitoring stations and high-resolution remote sensing product data in Xuzhou City, the atmospheric pollutants in 2020 and 2021 were analyzed. The modified A-values method and the model simulation method were used to estimate the remaining atmospheric environmental capacity (RAEC) of PM10 and PM2.5 pollutants in Xuzhou, Jiangsu Province. The results show that the excessive PM10 and PM2.5 pollutants are the main problems of atmospheric pollution in Xuzhou, and the annual emissions still need to be reduced are 10.80x10(4)t/a and 5.98x10(4)t/a, respectively. Among them, the situation is the most serious in Tongshan District, which still needs to cut annual PM10 and PM2.5 emissions by 7.41x10(4)t/a and 3.70x10(4)t/a, respectively. Xinyi City has the smallest annual PM10 emission reduction, which is 0.89x10(4)t/a. Suining County needs to cut the smallest PM2.5 emissions, at 0.67x10(4)t/a. In addition, there are significant quarterly differences in RAEC, with the first quarter > the fourth quarter > the second quarter > the third quarter. Except for the third quarter, the excess atmospheric environmental capacity was the most serious in Xuzhou urban area, the other three quarters were the highest in Tongshan District.