期刊
ENVIRONMENTAL POLLUTION
卷 156, 期 2, 页码 442-448出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2008.01.037
关键词
Hydrocarbon accumulation; Dated sediment cores; Compound-specific isotopic fingerprinting; The South China Sea
资金
- NSFC [40472149, U0633005]
- National Basic Research Program of China [2003CB415002]
- Environmental Science and Technology Centre, Environment Canada
Concentrations and fluxes of unresolved complex mixture of hydrocarbons (UCM) and polycyclic aromatic hydrocarbons (PAHs) were analyzed for two 210Pb dated sediment cores from the Peral River Estuary (PRE) and the adjacent northern South China Sea (NSCS). Compound-specific stable carbon isotopic compositions of individual n-alkanes were also measured for identification of the hydrocarbon sources. The historical records of PAHs in the NSCS reflected the economic development in the Pearl River Delta during the 20th century. PAHs in the NSCS predominantly derive from combustion of coal and biomass, whereas PAHs in the PRE are a mixture of petrogenic and pyrogenic in origins. The isotopic profiles reveal that the petrogenic hydrocarbons in the PRE originate predominantly from local spillage/leakage of lube oil and crude oils. The accumulation rates of pyrogenicc PAHs have significantly increased, whereas UCM accumulation has slightly declined in the NSCS in the recent three decades. (c) 2008 Elsevier Ltd. All rights reserved.
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