Source regional contributions to PM2.5 in a megacity in China using an advanced source regional apportionment method

Chemosphere
Ying-Ze TianYinchang Feng

Abstract

To quantify contributions of individual source categories from diverse regions to PM2.5, PM2.5 samples were collected in a megacity in China and analyzed through a newly developed source regional apportionment (SRA) method. Levels, compositions and seasonal variations of speciated PM2.5 dataset were investigated. Sources were determined by Multilinear Engine 2 (ME2) model, and results showed that the PM2.5 in Tianjin was mainly influenced by secondary sulphate & secondary organic carbon SOC (percent contribution of 26.2%), coal combustion (24.6%), crustal dust & cement dust (20.3%), secondary nitrate (14.9%) and traffic emissions (14.0%). The SRA method showed that northwest region R2 was the highest regional contributor to secondary sources, with percent contributions to PM2.5 being 9.7% for secondary sulphate & SOC and 6.0% for secondary nitrates; the highest coal combustion was from local region R1 (6.2%) and northwest R2 (8.0%); the maximum contributing region to crustal & cement dust was southeast region R4 (5.0%); and contributions of traffic emissions were relatively spatial homogeneous. The seasonal variation of regional source contributions was observed: in spring, the crustal and cement dust contributed a higher perce...Continue Reading

References

Sep 29, 2006·Journal of the Air & Waste Management Association·Injo Hwang, Philip K Hopke
Mar 4, 2014·Environmental Pollution·María Aránzazu RevueltaAndrés Alastuey

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Citations

Apr 3, 2016·The Science of the Total Environment·Ying-Ze TianYin-Chang Feng
May 7, 2016·Environmental Science and Pollution Research International·In Sun KimJi Yi Lee

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