Journal
ECOTOXICOLOGY
Volume 24, Issue 7-8, Pages 1643-1649Publisher
SPRINGER
DOI: 10.1007/s10646-015-1503-z
Keywords
South China Sea; The Pearl River estuary; Sediments; PAHs; Distribution; Source
Categories
Funding
- Projects of Guangzhou Science and Technology [201504010006]
- key projects in the National Science & Technology Pillar Program in the Eleventh Five-year Plan Period [2012BAC07B0402]
- National Natural Science Foundation of China [41430966, 41106103, 41176101]
- Chinese Academy of Sciences [KSCX2-SW-132]
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The Pearl River delta, one of the most prosperous economically region in China, has experienced significant contaminant inputs. However, the dynamics of pollutants in the Pearl River estuary and the adjacent coastal areas are still unclear at present. In the paper, distribution and sources of polycyclic aromatic hydrocarbons (PAHs) were investigated in the surface sediments of the Pearl River estuary. The total PAHs concentrations ranged from 126.08 to 3828.58 ng/g with a mean value of 563.52 ng/g, whereas the highest PAHs were observed in Guangzhou channel. Among the U.S. Environmental Protection Agency's 16 priority PAHs, PAHs with 3-4 rings exhibited relative higher levels. A positive relationship was found between PAHs and total organic carbon. The source analysis further showed that the major sources of PAHs in the Pearl River estuary were originated from the pyrolytic inputs, reflecting a mixed energy structure such as wood, coal and petroleum combustion. In summary, although PAHs in Lingding Bay and the adjacent coastal areas of the Pearl River estuary exhibited a relatively low pollution level, the relatively high pollution level of PAHs in Guangzhou channel will be attended.
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