Distribution and origin of selected PCB and PAHs in the Arctic fjords sediments.

Lead Author Anna, Pouch
Institution Contact The Institute of Oceanology of the Polish Academy of Sciences Powstańców Warszawy 55, 81-712 Sopot, Poland, P.O. Box 148
Co-Authors Anna Pouch, The Institute of Oceanology of the Polish Academy of Sciences, Poland Agata Zaborska, The Institute of Oceanology of the Polish Academy of Sciences, Poland Ksenia Pazdro, The Institute of Oceanology of the Polish Academy of Sciences, Poland
Theme Theme 1: Vulnerability of Arctic Environments
Session Name 1.1 Climate Change and Environmental Management in the Arctic
Presentation Type Poster
Abstract text The main objective of the study is to present preliminary results of selected Persistent Organic Pollutants (POPs) concentrations in the Arctic fjords sediments.
The extension of knowledge on POPs cycling in the Arctic is important since POPs may be transported over long distances from distant sources, are persistent in the environment and toxic. They tend to accumulate in fatty tissues of organisms, moreover may biomagnify along the food web. POPs are highly reactive particles and are readily sorbed onto sinking organic and mineral particles. Part of them is accumulated by marine organisms and other part is deposited at the sea bottom. Deposited contaminants may be re-introduced to the water column and be again bioavailable.
The study presents the results of polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) concentration in sediments collected from Kongsfjord, Hornsund and Adventfjord. These fjords are influenced by different water masses, different rate of glaciers ablation and the intensity of primary and secondary production. The knowledge on POPs concentrations in the Adventfjord near Longyearbyen may allow to assess the significance of local pollution source. The concentrations of selected polychlorinated biphenyles and selected polycyclic aromatic hydrocarbons have been measured in sediment cores from selected depth intervals. Chromatography techniques were used for qualitative and quantitative analysis of polychlorinated biphenyls and polycyclic aromatic hydrocarbons. To assess the origin of PAHs contaminants in sediments, individual components ratios were used. Sediment cores were dated using 210Pb method, therefore the history of POPs accumulation has also been studied.
The concentration of Σ7PCBs and ∑12 PAHs in sediments ranged from 0.05 to 1.5 ng/g d.w. and from 33.5 to 463.3 ng/g d.w. respectively. The compounds present in highest proportion were volatile CB28 congener and phenanthrene. The obtained results are also discussed in the context of environmental conditions that may influence POPs accumulation.