Journal
MARINE POLLUTION BULLETIN
Volume 80, Issue 1-2, Pages 124-131Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2014.01.033
Keywords
Caspian Sea; Perylene; Biogenic; PAHs
Funding
- Ministry of Science, Technology and Innovation, Iran
- Iran Department of Environment [92.552]
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In this study, 84 surface sediment samples, from 28 Iranian rivers, 45 surface sediment samples and 31 samples from one core in the southwest of the Caspian Sea were collected and analyzed for polycyclic aromatic hydrocarbons (PAHs). The results showed high variability of perylene in coastal surface sediments (1.3-123.6 ng g(-1) dw) and river sediments (0.5-111.1 ng g(-1) dw). Core samples revealed high levels of perylene which increased with depth. Three diagnostic ratios (DRs) for source identification of perylene (Per/TPAH, Per/PAI and Py/Per) revealed a dominance of biogenic inputs to the surface layers (coasts and rivers) and diagenetic production of perylene in the sediment core. Hyrcanian forests with humid climates favor wood-degrading fungi and the production of perylene and its precursors. Biogenic production of perylene as a land plant derived biomarker can be used for the reconstruction of paleoclimatic conditions of the southwest Caspian Sea. (c) 2014 Elsevier Ltd. All rights reserved.
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