Surficial sediment samples were collected from three rivers and six canals in Tianjin, China and analyzed for petroleum hydrocarbons.
Chemical compositions and distribution patterns, as well as possible sources, of the petroleum hydrocarbons in the sediments were discussed.
A series of petroleum hydrocarbons, including n-alkanes, isoprenoid alkanes, anteiso-alkanes, alkyl hexamethylene, hopanes and
steranes were detected in the samples. The concentration of petroleum hydrocarbons varied in a wide range of 0.072–3.000 mg g1 in the
surficial sediment of the rivers and canals in Tianjin. In the samples studied, the total concentrations of petroleum hydrocarbons in the
sediment samples from North Canal, South Canal, and G3 segment of South Sewage Canal were higher than those from Hai River,
South Sewage Canal and North Sewage Canal. Accumulation of pollutants in the sediments from reaches close to urban area was also
observed. The PHC spatial variability is mostly affected by many local inputs. The main sources of petroleum hydrocarbons in the sediment
in Tianjin were considered to be petroleum importation and biochemical degradation of organisms, including cuticular of aquatic
vegetation and algae.
2006 Elsevier Ltd. All
Surficial sediment samples were collected from three rivers and six canals in Tianjin, China and analyzed for petroleum hydrocarbons.
Chemical compositions and distribution patterns, as well as possible sources, of the petroleum hydrocarbons in the sediments were discussed.
A series of petroleum hydrocarbons, including n-alkanes, isoprenoid alkanes, anteiso-alkanes, alkyl hexamethylene, hopanes and
steranes were detected in the samples. The concentration of petroleum hydrocarbons varied in a wide range of 0.072–3.000 mg g1 in the
surficial sediment of the rivers and canals in Tianjin. In the samples studied, the total concentrations of petroleum hydrocarbons in the
sediment samples from North Canal, South Canal, and G3 segment of South Sewage Canal were higher than those from Hai River,
South Sewage Canal and North Sewage Canal. Accumulation of pollutants in the sediments from reaches close to urban area was also
observed. The PHC spatial variability is mostly affected by many local inputs. The main sources of petroleum hydrocarbons in the sediment
in Tianjin were considered to be petroleum importation and biochemical degradation of organisms, including cuticular of aquatic
vegetation and algae.
2006 Elsevier Ltd. All
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