Abstract
The total mercury (THg) and methylmercury (MeHg) distributions in the surface sediments of Kongsfjorden, Svalbard, in the Norwegian Arctic were investigated in this study. The results showed that THg concentrations ranged from 9.11 to 86.73 ng g−1, whereas MeHg concentrations had an average of only 0.11 ng g−1. Factors that control the distribution and methylated transformation of mercury were examined, and the results suggested that the movements of ocean currents and glaciers affect the THg distribution. The total organic carbon (TOC) and N contents in the sediments were positively correlated with THg concentration, which indicated that the THg distribution at these stations was primarily controlled by organic matter in the sediments. A complex relationship was observed between the THg and S contents, possibly due to anthropogenic activities involved in the perennial scientific expedition. MeHg and THg exhibited similar correlations with the sediment chemical characteristics for all stations suggesting that MeHg may be produced locally through the microbial methylation of mercury.
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Acknowledgments
We wish to express our sincere gratitude to the Chinese Arctic and Antarctic Administration, State Oceanic Administration of China for the field logistic support. Samples used in this study are provided by the Sediment Samples of Polar Sample Platform of the National Natural Resources. This research was supported by the National Natural Science Foundation of China (nos. 41376189, 51278357, 41406213), Science Foundation of Shanghai Municipal Government (no. 12ZR1434800), State Key Laboratory of Pollution Control and Resource Reuse Foundation (Tongji University) (no. PCRRY11016).
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Liu, Y., Chai, X., Hao, Y. et al. Total mercury and methylmercury distributions in surface sediments from Kongsfjorden, Svalbard, Norwegian Arctic. Environ Sci Pollut Res 22, 8603–8610 (2015). https://doi.org/10.1007/s11356-014-3942-0
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DOI: https://doi.org/10.1007/s11356-014-3942-0