Ambient Precursor Gaseous Pollutants and Meteorological Conditions Controlling Variations of Particulate Matter Concentrations. Issue 8 (13th July 2017)

• Record Type: Journal Article
• Authors: Kuo, Yi‐Ming; Zhao, Enmin; Li, Min‐Jing; Yu, Hui; Qin, Jun
• Is Part Of: Clean. Volume 45:Issue 8(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-07-13
• Subjects: Carbon monoxide -- Dynamic factor analysis -- Nitrogen oxides -- PM2.5 -- Wuhan; Water quality -- Periodicals; Water -- Pollution -- Periodicals; Pollution -- Periodicals; Bioremediation -- Periodicals; Sewage -- Periodicals; Water chemistry -- Periodicals; 333.7205
• DOI: 10.1002/clen.201600655
• Languages: English
• ISSNs: 1863-0650

Abstract

Abstract : In many areas of China, rapid industrialization, urbanization, and transportation development have resulted in PM2.5 concentrations higher than the WHO‐recommended level. The precursor gaseous pollutants, which will be finally transformed to PM2.5, should be identified and controlled in the early stage. Dynamic factor analysis (DFA) was performed to investigate how precursor gaseous pollutants and meteorological factors associate with the temporal dynamics of fine particulate matter (PM2.5 ) in Wuhan in 2013. The optimal DFA model satisfactorily accounted for the fluctuations in PM2.5 (coefficient of efficiency was 0.88). The results showed that the temporal dynamics of PM2.5 in Wuhan were primarily associated with sulfur oxides, nitrogen oxides (NO x ), carbon monoxide (CO), relative humidity, temperature, and wind speed. PM2.5 concentrations were also slightly affected by three common trends mainly representing soil dust and urbanization process. Temperature contributed more to the long‐term dynamics of PM2.5 than wind speed and relative humidity did. High temperature favors the formation of PM2.5 . However, relative humidity was negatively contributed to PM2.5 . NO2 and CO were the two major precursor gaseous pollutants contributing to the compositions of PM2.5 . In Wuhan, NO2 and CO mainly emitted from motor vehicles and industrial processes should be restricted, because these precursor emissions will finally format particulate matter. Abstract : PM2.5 concentrations are higher than the WHO‐recommended level in Wuhan. The results of dynamic factor analysis show that the temporal dynamics of PM2.5 in Wuhan are primarily associated with CO, NO2, SO2, relative humidity, temperature, and wind speed. The emitted sources of precursor gaseous pollutants should be restricted or controlled in the early stage to avoid further transforming to particulate matters.