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- Title
Soluble Trace Metals and Major Ionic Species in the Bulk Deposition and Atmosphere of Hong Kong.
- Authors
Tanner, P. A.; Wong, A. Y. S.
- Abstract
Diurnal bulk deposition samples were collected in an urban residential area in Hong Kong from 1996 to 1997, and were analyzed for major anionic and cationic species. The rapid Kuderna-Danish vacuum concentration technique was adapted to preconcentrate the soluble components of rainwater samples prior to the analysis of 7 trace metal species by GFAAS. Percentage recoveries in the range 80–115% were obtained for the trace metals, without the addition of any modifier. The results showed the importance of below-cloud washout since the removal of the trace metals from the atmosphere by precipitation depended upon the rainfall pH and amount. Bulk deposition fluxes of the soluble trace metals are generally comparable with literature values for (total) Al, Cu, Mn, V and Fe, but are much smaller for Cd and Pb. A comparison of bulk deposition concentrations with soluble and insoluble ambient particulate matter concentrations in Hong Kong has also been made. Several occasions of low rainfall amount, small rainfall intensity, and low windspeed, produced high concentrations of trace metals in bulk deposition in 1996, coinciding with pH values down to 3.6.
- Subjects
HONG Kong (China); CHINA; ATMOSPHERIC deposition; SEDIMENTATION &; deposition; METALS &; the environment; ANIONS; CATIONS; RAINFALL; CITIES &; towns
- Publication
Water, Air & Soil Pollution, 2000, Vol 122, Issue 3-4, p261
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1023/A:1005232313641