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Persistent toxic substances in remote lake and coastal sediments from Svalbard, Norwegian Arctic: Levels, sources and fluxes |
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| Authors: | Liping Jiao Gene J Zheng Tu Binh Minh Liqi Chen Yuanhui Zhang Leo W Yeung Xulin Yang Paul KS Lam Ming H Wong |
| Institution: | a Department of Biology & Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China b Croucher Institute for Environmental Sciences, Department of Biology, Hong Kong Baptist University, Kowloon, Hong Kong SAR, China c Key Laboratory of Global Change and Marine-Atmospheric Chemistry, State Oceanic Administration, 178 Daxue Road, Xiamen, Fijian, China d Third Institute of Oceanography, State Oceanic Administration, 178 Daxue Road, Xiamen, Fujian, China |
| Abstract: | Surface sediments from remote lakes and coastal areas from Ny-Ålesund, Svalbard, Norwegian Arctic were analyzed for polycyclic aromatic hydrocarbons (PAHs), polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs). Relatively high levels of PAHs were encountered from several lakes from Ny-Ålesund, which were within the range of levels reported for European high mountain lakes and some urban/industrialized areas in the world, pointing to the role of remote Arctic lakes as potential reservoir of semi-volatile organic compounds. Specific patterns of PBDEs were observed, showing higher concentrations of lower brominated compounds such as BDE-7, 17 and 28. Estimated surface sediment fluxes of PAHs in Ny-Ålesund remote lakes were similar to those observed for some European high mountain lakes. The current PAH levels in sediments from three lakes exceeded Canadian sediment quality guidelines, suggesting the presence of possible risks for aquatic organisms and the need for further studies. |
| Keywords: | PAHs PBDEs Remote lake sediments Accumulation patterns Fluxes |
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