TY - JOUR
T1 - Seasonal variations and chemical characteristics of PM2.5 in Wuhan, central China
AU - Zhang, Fan
AU - Wang, Zu-wu
AU - Cheng, Hai-rong
AU - Lv, Xiao-pu
AU - Gong, Wei
AU - Wang, Xin-ming
AU - Zhang, Gan
N1 - Funding Information:
This work was supported by the Natural Science Foundation of China (NSFC) (Grant No. 41103061 ), the Doctoral Fund Project of the Ministry of Education of China (Grant No. 20110141120015 ), and the National 973 Programme (Grant No. 2011CB707106 ).
Publisher Copyright:
© 2015.
PY - 2015/6
Y1 - 2015/6
N2 - PM2.5 samples were collected at an urban site (WD) and a suburban site (TH) in Wuhan from August 2012 to July 2013. The mass concentrations of water-soluble inorganic ions, carbonaceous species and elements of PM2.5 were measured. The annual mean concentrations of PM2.5 were 106.5μg/m3 and 114.9μg/m3 at WD and TH, respectively. The chemical compositions of PM2.5 at WD were similar to those at TH and the fractions of the major components of PM2.5 in Wuhan were in the following order of trace elements42-, NO3- and NH4+ all exhibited strong seasonal distributions, consistently with the lowest values in summer and the highest in winter. OM was the most abundant component in PM2.5, the lowest concentrations of which were observed in summer at both sites, while the highest concentrations of OC (organic carbon) appeared in winter at WD and autumn at TH, respectively. The highest OC concentration observed in autumn was tightly related to the biomass burning near the suburban site. The crustal elements (Mg, K, Ca and Fe) dominated the 20 detected elements in PM2.5, with the highest concentrations in spring in Wuhan, which might be due to frequent sandstorm from north carrying abundant soil dusts in spring in China. Ten trace elements (Cu, Ga, Ag, Tl, Ca, As, Zn, Pb, Se and Cd) were enriched in PM2.5 and the higher EF for Ag, Pb, Se and Cd in PM2.5 indicated that the air pollution from vehicle exhaust emission and coal burning in Wuhan was serious and noteworthy.
AB - PM2.5 samples were collected at an urban site (WD) and a suburban site (TH) in Wuhan from August 2012 to July 2013. The mass concentrations of water-soluble inorganic ions, carbonaceous species and elements of PM2.5 were measured. The annual mean concentrations of PM2.5 were 106.5μg/m3 and 114.9μg/m3 at WD and TH, respectively. The chemical compositions of PM2.5 at WD were similar to those at TH and the fractions of the major components of PM2.5 in Wuhan were in the following order of trace elements42-, NO3- and NH4+ all exhibited strong seasonal distributions, consistently with the lowest values in summer and the highest in winter. OM was the most abundant component in PM2.5, the lowest concentrations of which were observed in summer at both sites, while the highest concentrations of OC (organic carbon) appeared in winter at WD and autumn at TH, respectively. The highest OC concentration observed in autumn was tightly related to the biomass burning near the suburban site. The crustal elements (Mg, K, Ca and Fe) dominated the 20 detected elements in PM2.5, with the highest concentrations in spring in Wuhan, which might be due to frequent sandstorm from north carrying abundant soil dusts in spring in China. Ten trace elements (Cu, Ga, Ag, Tl, Ca, As, Zn, Pb, Se and Cd) were enriched in PM2.5 and the higher EF for Ag, Pb, Se and Cd in PM2.5 indicated that the air pollution from vehicle exhaust emission and coal burning in Wuhan was serious and noteworthy.
KW - Chemical characteristics
KW - PM2.5
KW - Seasonal variations
KW - Wuhan
UR - http://www.scopus.com/inward/record.url?scp=84924233233&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2015.02.054
DO - 10.1016/j.scitotenv.2015.02.054
M3 - Journal article
C2 - 25747369
AN - SCOPUS:84924233233
SN - 0048-9697
VL - 518-519
SP - 97
EP - 105
JO - Science of the Total Environment
JF - Science of the Total Environment
ER -
