Fast and reliable source identification of criteria air pollutants in an industrial city

• Published in: Atmospheric environment (1994) Vol. 95; pp. 239 - 248
• Main Authors: Clarke, Kevin, Kwon, Hye-Ok, Choi, Sung-Deuk
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.10.2014; Elsevier
• Subjects: Air pollution; Applied sciences; Atmospheric pollution; Automation; Criteria; Criteria air pollutants; Environmental monitoring; Exact sciences and technology; Industrial city; Nitrogen dioxide; Pollutants physicochemistry study: properties, effects, reactions, transport and distribution; Pollution; Pollution abatement; Pollution sources; Source identification; Stations; Ulsan; Asia; South Korea; Korea; Korea, Rep; Air pollution; Ulsan; Source identification; Criteria air pollutants; Industrial city; Identification; Urban area; Spatial variation; Time variation; High atmospheric pollution episode; Trend analysis; Pollution source inventory; Industrial area; Concentration distribution
• ISSN: 1352-2310; 1873-2844
• DOI: 10.1016/j.atmosenv.2014.06.040

Most of industrial cities in developed countries use automatic station networks for monitoring of Criteria Air Pollutants (CAPs), and the tremendous amount of data acquired are often used to verify that the concentrations are within safety levels and to warn the population in the other case. Furthermore, these data can be used to investigate the source–receptor relationship. In this study, the data were collected from automatic monitoring stations in Ulsan, the most industrialized city in South Korea. The dataset consists of hourly concentrations of five CAPs (SO2, CO, O3, NO2, and PM10) recorded at 13 monitoring stations in the city during a full year (March 2011–February 2012). Different types of sources were identified by studying the temporal (daily and seasonal) trends and spatial distributions of CAPs with wind directions. It was confirmed that SO2 pollution in Ulsan originated mostly from local industrial areas, whereas CO and NO2 were also substantially influenced by mobile sources. The high PM10 levels resulted from both local industries and traffic sources as well as from remote sources. The originality of this work comes from the study of the high episodes of pollutions on a case by case basis as well as on average data. Moreover, rather simple statistical tools developed in this study can be used for a real-time diagnosis of the local pollution in large urban and industrial areas. •The source identification of air pollutants is important for an industrial city.•Criteria air pollutants were measured in the industrial city of Ulsan, South Korea.•We developed a fast and reliable source identification method.•Air pollution sources were identified using this new method.•The automation of this procedure may allow a real-time diagnostic of the sources.