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• W2040963558 abstract "Perylene is a polycyclic aromatic hydrocarbon (PAH) that is found pervasively in both marine and freshwater sediments, yet its origin remains obscure. We have explored relationships between perylene and possible precursor materials in two 210Pb-dated sediment cores from Lake Ontario in which contributions of aquatic and land-plant organic matter and concentrations of anthropogenic PAHs have been measured. No significant correlations were identified between perylene occurrence and indicators of terrigenous or aquatic sources of organic matter. Distinct differences between perylene and anthropogenic PAH sedimentary profiles rule out an industrial source for perylene at these locations. The general pattern of low-to-absent perylene concentrations in upper, oxic sediments and increasing concentrations with depth indicates that in situ diagenesis under anoxic conditions produces perylene and that its formation is kinetically controlled. The results of our study suggest that perylene is formed from non-specific precursor materials by biotic or abiotic transformation processes. If this scenario accurately describes its formation, then perylene is an indicator of depositional conditions rather than the source of organic matter." @default.
• W2040963558 created "2016-06-24" @default.
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• W2040963558 date "1998-11-01" @default.
• W2040963558 modified "2023-09-30" @default.
• W2040963558 title "Perylene: an indicator of alteration processes or precursor materials?" @default.
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• W2040963558 doi "https://doi.org/10.1016/s0146-6380(98)00056-4" @default.
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