Identification of perylene in sediments: Occurrence and diagenetic evolution



Perylene and penta-aromatic hydrocarbons were determined in sediments as part of a study that was dedicated to the aquatic ecosystem of Elelenwo Creek (Southern Nigeria) in order to carry out a critical corroboration of occurrence and diagenetic evolution of perylene in the sediments of the creek. The results show that the annual mean levels of Benzo [g, h, i] Perylene ranged from 209.00–245.28 ⧎g/kg dry weight at the various stations sampled. Meanwhile, Station 3 recorded the highest mean level of 245.28 ⧎g/kg dry weight. The observed values for total penta-aromatic hydrocarbons were high (787.00–1154.36⧎g/kg dry weight) in all the stations sampled. In addition, the highest mean value of 1154.36⧎g/kg dry weight was again recorded at station 3 for the penta-aromatic hydrocarbons. One origin index or concentration ratio of Ip/Ip+BghiP was also used to evaluate the suitability of the penta-aromatic hydrocarbons as a tracer to distinguish between contaminations arising from different sources. The values for the sampling stations therefore ranged from 0.41 to 0.43. A critical appraisal of the PAH index, consequently, suggested that petroleum combustion is the major penta-aromatic hydrocarbon source in sediments of the creek. The PAH group profile shows that perylene was high in the sediments and would pose apparent effects in fauna. The high concentration of perylene in the sediments was also indicative of an in situ biogenic derivation. Furthermore, a concentration of perylene > 10 % of total penta-aromatic hydrocarbons established a credible diagenetic origin.


Elelenwo Creek perylene penta-aromatic hydrocarbons sediments 


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© Islamic Azad University 2007

Authors and Affiliations

  1. 1.Department of Pure and Industrial ChemistryUniversity of NigeriaNsukkaNigeria
  2. 2.Department of Pure and Applied ChemistryNiger Delta UniversityYenagoaNigeria
  3. 3.Department of Environmental Sciences, Faculty of Engineering and Environmental SciencesImo State UniversityOwerriNigeria

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