Notice of RetractionTotal and Methyl Mercury Varieties in Water and Sediment of Wuli River in the past 25 Years

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

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Total and methyl mercury in water and sediment collected from Wuli River, which was past polluted by the Chlor alkali industry in Huludao city, had been investigated to reveal mercury varieties during the past 25 years. Results showed that total and methyl mercury in water were both in decreasing, and the most decrease was from 1998 when the pollution source was cut off. From the upstream to the downstream, total mercury in water was in decreasing but methyl mercury was increasing; total and methyl mercury in sediment were both in decreasing on the whole. In sediment of several representational sites, total mercury was increasing from the surface to the deep layer and methyl mercury mostly accumulated on the surface.