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Chen L.,Tianjin Academy of Environmental science | Chen L.,Key Laboratory of Tianjin Air Pollution Control | Zhou Y.,Tianjin Academy of Environmental science | Zhou Y.,Key Laboratory of Tianjin Air Pollution Control | And 10 more authors.
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2015

The air-quality model CMAQ/MM5 was used to investigate the contributions of various industrial sectors to PM2.5 pollution in different districts of Tianjin, China. Model simulations were conducted for January and July to represent typical winter and summer season, respectively. Known industrial sources were grouped into eight categories and "Zero-out" approach was used to identify the contributions of each category to PM2.5. Model results suggested that heating industry contributed most in winter in every district of Tianjin, accounting for more than 50% of the total PM2.5. Contributions from petroleum refinery and chemical manufacturing accounted for 7% of PM2.5 in winter and 23% in summer, and contributions from ferrous-metals smeltering and cement manufacturing accounted for 30% in summer and 65% in winter. Power plant industry was identified only as a minor contributor in both winter and summer among all the districts except Jixian. Geographical variations were found, for example, cement manufacturing was a major contributor in Hebei, Beic-hen, and Honqiao district, and chemical manufacturing was a major contributor in Ninghe and Binhai new area. ©, 2015, Chinese Society for Environmental Sciences. All right reserved. Source

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