Elemental carbon in urban soils and road dusts in Xi'an, China and its implication for air pollution

被引：78

作者：

Han, Y. M. ^{[1
]}

Cao, J. J. ^{[1
,2
]}

Chow, J. C. ^{[1
,3
]}

Watson, J. G. ^{[1
,3
]}

An, Z. S. ^{[1
]}

Liu, S. X. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710075, Peoples R China

[2] Xi An Jiao Tong Univ, Dept Environm Sci, Xian 710049, Peoples R China

[3] Desert Res Inst, Reno, NV 89512 USA

来源：

ATMOSPHERIC ENVIRONMENT | 2009年 / 43卷 / 15期

基金：

中国国家自然科学基金;

关键词：

Elemental carbon (EC); Road dusts; Carbonaceous particles; Thermal/optical reflectance (TOR) method; Char; Soot; THERMAL/OPTICAL REFLECTANCE METHOD; HEAVY-METAL CONTAMINATION; BLACK CARBON; SOURCE PROFILES; ORGANIC-MATTER; LUNG-CANCER; HONG-KONG; SEDIMENTS; SOOT; QUANTIFICATION;

D O I：

10.1016/j.atmosenv.2009.01.040

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 Van. 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 similar to 0.20 mg g(-1), while EC and char-EC varied widely, with no distinct pattern. Enrichment factor analysis indicated that 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. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2464 / 2470

页数：7

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