Journal
MARINE POLLUTION BULLETIN
Volume 87, Issue 1-2, Pages 152-163Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2014.07.063
Keywords
Caspian Sea; PAHs; LIA; Petrogenic; CSL
Funding
- Ministry of Science, Technology and Innovation, Iran
- Iran Department of Environment [92.552]
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In this study, 75 samples of two Pb-210-dated cores from the southwest of the Caspian Sea were analysed for 30 compounds of polycyclic aromatic hydrocarbons (PAHs). The TPAH(29) flux of the last six centuries ranged from 16.3 to 177.3 and 22.3 to 426.2 ng cm(-2) y(-1) in the Rezvanshahr and Anzali core sediments, respectively. Prior to 1840, four distinct maxima in PAH fluxes (61-426.2 ng cm(-2) y(-1)) with a low weathered petrogenic pattern were found in each of the core sediments. Simultaneity of distinct peaks of PAH fluxes before 1840 and Caspian Sea level high-stands during the Little Ice Age (LIA), revealed the high importance of this phenomenon in washing and transport of land-based oil pollution into the Caspian Sea. An overall increase in some diagnostic ratios (Flu/202, IP/276 and BaA/228), especially after 1940, indicated increase of pyrogenic PAHs as a result of industrial development in the catchment area. (C) 2014 Elsevier Ltd. All rights reserved.
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