The distribution of polycyclic aromatic hydrocarbons (PAHs) and n-alkanes was investigated in the surface sediment from the Shinano River in Niigata, Japan. The total concentrations of the PAHs and n-alkanes ranged from 102 to 10,450 ng/g dry weight and from 160 to 3,530 ng/g dry, respectively. Perylene (Per) in the sediment samples originated from both the same anthropogenic sources as benzo[a]pyrene and the natural sources; the anthropogenically derived Per was estimated at 0.4%–27% of the Per in the sediment. The carbon preference index values ranged from 0.77 to 2.48, suggesting the differences in the n-alkane sources at the investigated sites. The investigated sites were divided into three clusters by the cluster analysis.
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Hori, T., Shiota, N., Asada, T. et al. Distribution of Polycyclic Aromatic Hydrocarbons and n-Alkanes in Surface Sediments from Shinano River, Japan. Bull Environ Contam Toxicol 83, 455–461 (2009). https://doi.org/10.1007/s00128-009-9743-3