TY - JOUR
T1 - Elemental carbon in urban soils and road dusts in Xi'an, China and its implication for air pollution
AU - Han, Y. M.
AU - Cao, J. J.
AU - Chow, J. C.
AU - Watson, J. G.
AU - An, Z. S.
AU - Liu, S. X.
PY - 2009/5
Y1 - 2009/5
N2 - Increasing evidence confirms that elemental carbon (EC) is not only a light-absorbing constituent that warms the atmosphere but also a significant environmental pollutant. Investigations were conducted to identify carbonaceous pollution signatures in road dusts and urban soils and to evaluate potential sources in Xi'an. Average concentrations of EC, char-EC, and soot-EC in soils were 0.90, 0.51, and 0.39 mg g-1, respectively, a little higher than or comparable to prior studies on the Loess Plateau. Vertical profiles in soils revealed soot-EC concentrations from pre-industrialized samples close to ∼0.20 mg g-1, while EC and char-EC varied widely, with no distinct pattern. Enrichment factor analysis indicated that EC, char-EC, and soot-EC in road dusts were all elevated by an order of magnitude. The spatial distribution of total EC, char-EC, and soot-EC in road dusts revealed close correspondence with human activities such as coal combustion and vehicle emissions. The average char-EC/soot-EC ratio was 1.66 for road dusts, suggesting that the main sources of carbonaceous particles are local coal combustion and vehicle emissions. The study demonstrated that EC, char-EC, and soot-EC levels in road dusts are effective indicators of anthropogenic pollution.
AB - Increasing evidence confirms that elemental carbon (EC) is not only a light-absorbing constituent that warms the atmosphere but also a significant environmental pollutant. Investigations were conducted to identify carbonaceous pollution signatures in road dusts and urban soils and to evaluate potential sources in Xi'an. Average concentrations of EC, char-EC, and soot-EC in soils were 0.90, 0.51, and 0.39 mg g-1, respectively, a little higher than or comparable to prior studies on the Loess Plateau. Vertical profiles in soils revealed soot-EC concentrations from pre-industrialized samples close to ∼0.20 mg g-1, while EC and char-EC varied widely, with no distinct pattern. Enrichment factor analysis indicated that EC, char-EC, and soot-EC in road dusts were all elevated by an order of magnitude. The spatial distribution of total EC, char-EC, and soot-EC in road dusts revealed close correspondence with human activities such as coal combustion and vehicle emissions. The average char-EC/soot-EC ratio was 1.66 for road dusts, suggesting that the main sources of carbonaceous particles are local coal combustion and vehicle emissions. The study demonstrated that EC, char-EC, and soot-EC levels in road dusts are effective indicators of anthropogenic pollution.
KW - Carbonaceous particles
KW - Char
KW - Elemental carbon (EC)
KW - Road dusts
KW - Soot
KW - Thermal/optical reflectance (TOR) method
UR - https://www.scopus.com/pages/publications/63249123491
U2 - 10.1016/j.atmosenv.2009.01.040
DO - 10.1016/j.atmosenv.2009.01.040
M3 - 文章
AN - SCOPUS:63249123491
SN - 1352-2310
VL - 43
SP - 2464
EP - 2470
JO - Atmospheric Environment
JF - Atmospheric Environment
IS - 15
ER -
