Size distribution of black (BC) and total carbon (TC) in Vienna and Ljubljana

被引:28
作者
Hitzenberger, R.
Ctyroky, P.
Berner, A.
Tursic, J.
Podkrajsek, B.
Grgic, I.
机构
[1] Univ Vienna, Inst Expt Phys, A-1090 Vienna, Austria
[2] Natl Inst Chem, Analyt Chem Lab, Ljubljana, Slovenia
关键词
impactor/filter ratio; chemical characterization; black carbon BC; total carbon TC; size distribution; urban aerosol;
D O I
10.1016/j.chemosphere.2006.06.042
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
During two campaigns in winter 2004, size segregated impactor samples (0.1-10 mu m) and filter samples were taken in two Central European cities (Vienna, Austria and Ljubljana, Slovenia). The impactor samples were analyzed for major inorganic ions and short-chain organic acids, total carbon (TC) and black carbon (BC). Maximum concentrations of total mass were 71.6 mu g m(-3) in Vienna and 73.1 mu g m(-3) in Ljubljana. Minimum concentrations in Vienna were only half those in Ljubljana. The BC content of the aerosol was similar (ca. 8%), but the BC/TC ratio was higher in Vienna than in Ljubljana (0.39 vs. 0.29), reflecting the different contribution of diesel traffic emissions. The mass median diameters of the submicron size distributions of all major fractions (total mass, TC, BC and SO42-) were smaller in Vienna (0.43 mu m, 0.41 mu m, 0.38 mu m and 0.48 mu m, respectively) than in Ljubljana (0.55 mu m, 0.44 mu m, 0.42 mu m and 0.60 mu m, respectively). Impactor/filter ratios for total mass were 0.79 in Vienna and 0.82 in Ljubljana, while the ratios for BC were 0.56 in Vienna and 0.49 in Ljubljana. An estimation of the mixing state of accumulation mode BC indicated that 33% and 37% of BC, respectively, are mixed externally to the aerosol in the accumulation size range in Vienna and Ljubljana. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2106 / 2113
页数:8
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