You are here:
WINTERTIME MEASUREMENTS OF ACIDIC AEROSOLS IN WUHAN: A CITY IN CENTRAL CHINA
Citation:
Waldman, J., P. Lioy, M. Zelenka, L. Jing, U. Lin, Q. He, Z. Quian, R. Chapman, AND W. Wilson. WINTERTIME MEASUREMENTS OF ACIDIC AEROSOLS IN WUHAN: A CITY IN CENTRAL CHINA. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-91/208 (NTIS PB91243006).
Description:
A two-week intensive ambient aerosol study was conducted in December 1988 in Wuhan (Hubei Province), a city of nearly 2 million located on the Yangtze River in central China (PRC). his is an industrial region where soft coal burning is widespread and emission controls for vehicles and industrial facilities are minimal. he sampling site was located In one of the civic centers where residential and commercial density is highest. amples were collected from Dec. 18 through Dec. 30 with a dichotomous sampler (fine and coarse particles) and an annular denuder (ions and strong acidity). he period was rainless with consistently cool (3 to 10 degrees C) and overcast conditions, without fog. ine particulate mass (PM, as ug m-3) averaged 145 (range 55-360); coarse PM averaged 89 (range 50-200). etal concentrations were also dramatically high. or example, the maximum values for the elements in greatest abundance -- Fe, Pb, Se and Zn (in ugm-3) -- were, respectively, 1.1, 0.71, 0.12 and 1.3 (fine fraction) and 5.6, 0.28, 0.008 and 0.4 (coarse fraction). espite the seemingly high PM loadings, ionic concentrations were not especially high. he average composition of soluble fine aerosol species (in neq m-3) were SO4 = :520 (range 180 to 980), NO3: 225 (range 50 to 470), Cl : 215 (range 20 to 640), NH4 : 760 (range 280 to 1660). erosol acidity was negligible during most monitoring periods, H+: 14 (range 0 to 50 neq m-3, equivalent to - 2.5 ugn m-3 H2 SO4. ulfur dioxide, measured by the West-Gaeke method for part of the study, was also low, further indicating this was not a period of intense stagnation (cf. London-type smog episodes).
