Ye Bixiong, Zhang Zhihuan, Mao Ting
Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China.
Chemosphere. 2007 May;68(1):140-9. doi: 10.1016/j.chemosphere.2006.12.074. Epub 2007 Feb 12.
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 g(-1) 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.
在中国天津的三条河流和六条运河采集了表层沉积物样本，并对其进行了石油烃分析。讨论了沉积物中石油烃的化学组成、分布模式以及可能的来源。在样本中检测到了一系列石油烃，包括正构烷烃、类异戊二烯烃、反异构烷烃、烷基己烷、藿烷和甾烷。天津河流和运河表层沉积物中石油烃浓度变化范围很广，为0.072 - 3.000 mg g(-1)。在所研究的样本中，北运河、南运河和南排污河G3段沉积物样本中石油烃的总浓度高于海河、南排污河和北排污河。还观察到靠近市区河段沉积物中污染物的积累。多环芳烃的空间变异性主要受许多本地输入的影响。天津沉积物中石油烃的主要来源被认为是石油进口以及生物的生化降解，包括水生植物和藻类的表皮。
