Abstract
As one of China’s emerging urban agglomerations, the Changzhutan urban area is suffering from regional composite air pollution. Previous studies mainly focus on single cities or world-class urban agglomerations, which cannot provide a scientific basis for air pollution in emerging urban agglomerations. This paper proposes the latest high-resolution emission inventory through the emission factor method and compares the results with the rest of the urban agglomeration. The emission inventory shows that the estimates for sulfur dioxide (SO2), nitrogen oxides (NOX), particulate matter 10 (PM10), particulate matter 2.5 (PM2.5), volatile organic compounds (VOCs), and ammonia (NH3) emission are 132.5, 148.9, 111.6, 56.5, 119.0, and 72.0 kt, respectively. From the 3 × 3 km emission grid, the spatial difference of air pollutant emissions in the Changzhutan urban agglomeration was more obvious, but the overall trend of monthly pollutant discharge was relatively stable. Depending on the source apportionment, SO42−, OC, and NO3− are the main chemical constituents of PM2.5, accounting for 13.06, 8.24, and 4.84 μg/m3, respectively. Simultaneously, industrial emissions, vehicle exhaust, and dust are still three main sources that cannot be ignored. With the support of these data, the results of this study may provide a reference for other emerging urban agglomerations in air quality.
Highlights
With the effective management of traditional pollution, the continuous expansion of urban areas, and the long-distance transmission of atmospheric pollution, the characteristics of regional composite air pollution is gradually emerging
This paper focuses on creating an air pollutant emission inventory of the CZT urban agglomeration based on the year 2015
The Chinese emission inventory was mostly based on foreign emission factors in the past
Summary
With the effective management of traditional pollution, the continuous expansion of urban areas, and the long-distance transmission of atmospheric pollution, the characteristics of regional composite air pollution is gradually emerging. Analysis of pollution sources is the precondition for the treatment of regional composite air pollution. The emission inventory method can demonstrate the spatial–temporal distribution of air pollutants emissions in various regions and accurately simulate the atmospheric environmental quality of the region [1]. Establishing an air pollution source information database and constructing a key pollution source spectrum are of major practical significance for comprehensively grasping regional environmental pollution characteristics and improving regional environmental quality. Urban agglomeration is famous for the metallurgical and chemical industry in China, which may inevitably lead to the deterioration of urban and regional atmospheric quality.
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