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Emission inventory and characteristics of anthropogenic air pollutant sources in Liaoning Province

In order to comprehensively evaluate air pollutant emissions in Liaoning, a detailed provincial emission inventory of anthropogenic sourecs was developed for 2012 based on collected activity data and emission factors.The total emissions of SO2, NOx, CO,  PM10, PM2.5,black carbon ( BC),organic carbon ( OC) and NH3 in Liaoning were estimated at 1434.8×103,1632.3×103 ,6682.9×103,1529.9×103,1087.8×103,74.5×103,176.1×103 and 880.4×103 t,respectively.Distributed principally in central and western Liaoning,BC and OC were mainly from biomass combustion source. Nfertilizer application and livestock were the top two contributors of NH3 emissions,and NH3 emissions were mainly distributed in central area with developed agriculture and stockbreeding.Industrial process source and stationary combustion source contributed significantly to other pollutants,which were concentrated in the city clusters in the middle of Liaoning and Jinzhou,Ganjingzi and Pulandian District of Dalian.Shenyang and Dalian were the cities with largest SO2,NOx,NH3 and particles emissions. Anshan and Benxi were the cities with the largest CO emissions due to the developed iron and steel industry. NO2 vertical column densities ( NO2-VCD) from the Ozone Monitoring Instrument ( OMI) were used to evaluate the spatial distribution of NOx emissions,and the spatial correlation coefficient between them was 0.57 ( p<0.01) .There were some differences between provincial and national emission inventory for Liaoning owing to application of different activity level and pollutant control efficiencies in the two inventories.Our provincial inventory based on detailed information on individual pollution sources is expected to be more consistent with actual conditions.Improvement on emission estimation of point sources and domestic measurements on local emission factors are further recommended in the future to reduce the uncertainty of provincial emission inventory.


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Copyright 南京大学赵瑜教授研究组