期刊
ENVIRONMENTAL POLLUTION
卷 157, 期 1, 页码 273-279出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2008.06.039
关键词
Polycyclic aromatic hydrocarbons; Air-water exchange; Urban lake; Monsoon climate
资金
- Natural Science Foundation of China (NSFC) [40590391, 40603022, 40518002, 40473041]
- Research Grants Council (RGC) of the Hong Kong SAR Government [5147/03E, PolyU 5212/05E, N_PolyU535/05]
- Guangdong Ministry of Science and Technology [GD-SFC No. 06300375]
Urban lakes are vulnerable to the accumulation of semivolatile organic compounds, such as PAHs from wet and dry atmospheric deposition. Little was reported on the seasonal patterns of atmospheric deposition of PAHs under Asian monsoon climate. Bulk (dry + wet) particle deposition, air-water diffusion exchange, and vapour wet deposition of PAHs in a small urban lake in Guangzhou were estimated based on a year-round monitoring. The total PAH particle deposition fluxes observed were 0.44-3.46 mu g m(-2) day(-1). The mean air-water diffusive exchange flux was 20.7 mu g m(-2) day(-1). The vapour deposition fluxes of PAHs ranged 0.15-8.26 mu g m(-2) day(-1). Remarkable seasonal variations of particulate PAH deposition, air-water exchange fluxes and vapour wet deposition were influenced by seasonal changes in meteorological parameters. The deposition fluxes were predominantly controlled by the precipitation intensity in wet season whereas by atmospheric concentration in dry season. (c) 2008 Elsevier Ltd. All rights reserved.
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