By Hua Zhang
From a brand new point of view, particularly concentrating on the interplay of selenium and mercury, this thesis presents new insights into conventional study on biogeochemical cycles of mercury in soil-plant interplay and linked human publicity and hazards. the topic of this thesis is either priceless and well timed, supplying crucial details not just on selenium-mercury interplay within the soil-plant process but in addition on find out how to determine the mixed advantages and threat of co-exposure to mercury and selenium. This paintings additionally sheds gentle on destiny features concerning prevention, remediation and chance administration for environmental mercury illness. featuring fine quality papers released in best overseas SCI journals akin to Environmental well-being views and Environmental technology & expertise and having been well-known with the distinctive Award of Presidential Scholarship Award and perfect Doctoral Dissertations Prize of the chinese language Academy of Sciences (CAS), this thesis deals a priceless source for clinical groups, policy-makers and non-experts who're attracted to this field.
Dr. Hua Zhang works on the Norwegian Institute for Water learn (NIVA), Oslo, Norway.
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Extra info for Impacts of Selenium on the Biogeochemical Cycles of Mercury in Terrestrial Ecosystems in Mercury Mining Areas
National Academy Press, Washington Parˇízek J, Oštˇádalová I (1967) The protective effect of small amounts of selenite in sublimate intoxication. Cell Mol Life Sci 23(2):142–143 Pirrone N, Cinnirella S, Feng X, Finkelman R, Friedli H, Leaner J, Mason R, Mukherjee A, Stracher G, Streets D, Telmer K (2010) Global mercury emissions to the atmosphere from anthropogenic and natural sources. Atmos Chem Phys 10:5951–5964 Raymond LJ, Ralston NVC (2004) Mercury: selenium interactions and health implications.
This speculation has been confirmed by related studies (Belzile et al. 2009; Peterson et al. 2009a, b). This process is continuously involved in the biogeochemical cycling of Hg and the ‘‘seizing’’ or ‘‘solidification’’ of available Hg, resulting in low Hg levels in fish in some Se-rich areas. In contrast, the absence of available Se will lead to an increase in the Hg levels in fish. This understanding provides a certain motivation for using the ‘‘repulsion’’ between Se and Hg to assist plants or aquatic organisms in inhibiting the absorption and accumulation of MeHg by adding Se to soils or lakes.
Southworth has proposed that the total dissolved Se concentration in water should not exceed the safe range of 5 lg/L when Se is added to reduce the MeHg enrichment in fish (Southworth et al. 2000). 4 to 3–5 lg/L (Paulsson and Lundbergh 1989). In addition to the necessity for careful consideration of the amount of Se to be added to an environment, there are many environmental factors involved in controlling the chelation between Se and Hg in 22 2 Advances in Research on the Mechanisms of Selenium–Mercury Interactions soils and the period required to achieve the ‘‘solidification’’ of Se and Hg chelation; these environmental factors should also be taken into account, and the long-term effects of Se addition in various circumstances still require thorough study.
Impacts of Selenium on the Biogeochemical Cycles of Mercury in Terrestrial Ecosystems in Mercury Mining Areas by Hua Zhang