Abstract
As one of the most populated regions in China, Sichuan province had been suffering from deteriorated air quality due to the dramatic growth of economy and vehicles in recent years. To deal with the increasingly serious air quality problem, Sichuan government agencies had made great efforts to formulate various control measures and policies during the past decade. In order to better understand the emission control progress in recent years and to guide further control policy formulation, the emission trends and source contribution characteristics of SO2, NOX, PM10 and PM2.5 from 2013 to 2017 were characterized by using emission factor approach in this study. The results indicated that SO2 emission decreased rapidly during 2013–2017 with total emission decreased by 52%. NOX emission decreased during 2013–2015 but started to increase slightly afterward. PM10 and PM2.5 emissions went down consistently during the study period, decreased by 26% and 25%, respectively. In summary, the contribution of power plants kept decreasing, while contribution of industrial combustion remained steady in the past 5 years. The contribution of industrial processes increased for SO2 emission, and decreased slightly for NOX, PM10 and PM2.5 emissions. The on-road mobile sources were the largest emission contributor for NOX, accounting for about 32–40%, and its contribution increased during 2013–2015 and then decreased. It was worth mentioning that nonroad mobile sources and natural gas fired boilers were becoming important NOX contributors in Sichuan. Fugitive dust were the key emission sources for PM10 and PM2.5, and the contribution kept increasing in the study period. Comparison results with other inventories, satellite data and ground observations indicated that emission trends developed in this research were relatively credible.
Highlights
As one of the most populated regions in China, Sichuan province had been suffering from deteriorated air quality due to the dramatic growth of economy and vehicles in recent years
The materials presented include (1) emission trends in Sichuan province; (2) characterization of emission source contribution variation; (3) emission trends validation; (4) uncertainties in emission estimates
SO2, NOX, PM10 and PM2.5 emissions decreased by 52%, 12%, 26%, and 25%, while the GDP and energy consumption increased by 40% and 3%, indicating the effectiveness of control measures adopted by government in recent years
Summary
As one of the most populated regions in China, Sichuan province had been suffering from deteriorated air quality due to the dramatic growth of economy and vehicles in recent years. In order to better understand the emission control progress in recent years and to guide further control policy formulation, the emission trends and source contribution characteristics of SO2 , NOX , PM10 and PM2.5 from 2013 to 2017 were characterized by using emission factor approach in this study. The contribution of industrial processes increased for SO2 emission, and decreased slightly for NOX , PM10 and PM2.5 emissions. The on-road mobile sources were the largest emission contributor for NOX , accounting for about 32–40%, and its contribution increased during 2013–2015 and decreased. Fugitive dust were the key emission sources for PM10 and PM2.5 , and the contribution kept increasing in the study period. To deal deal with with the the increasingly increasingly serious serious air air quality quality problem, problem, both both national national and and local local
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
