Conversion of mercury(II) into mercury(0), monomethylmercury cation, and dimethylmercury in saltmarsh sediment slurries

This paper describes conversion of mercury(II) to elemental mercury (Hg), monomethylmercury cation (MeHg +), and dimethylmercury (Me 2Hg) in slurries of saltmarsh sediments collected from April to October in 1996. Variables in these mercury conversion studies included nature of nutrient media, react...

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Bibliographic Details
Published in:Chemosphere (Oxford) 1998-03, Vol.36 (7), p.1669-1687
Main Authors: Weber, James H., Evans, Robert, Jones, Stephen H., Hines, Mark E.
Format: Article
Language:English
Subjects:
Applied sciences
Biological and physicochemical properties of pollutants. Interaction in the soil
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Exact sciences and technology
Pollution
Pollution, environment geology
Soil and sediments pollution
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Summary:This paper describes conversion of mercury(II) to elemental mercury (Hg), monomethylmercury cation (MeHg +), and dimethylmercury (Me 2Hg) in slurries of saltmarsh sediments collected from April to October in 1996. Variables in these mercury conversion studies included nature of nutrient media, reaction time, and anaerobic vs. aerobic conditions. Hg o forms in all spiked experiments and most unspiked controls. MeHg + occurs in most slurries made from sediments sampled in all months except May and June, while Me 2Hg occurred regularly only in slurries of April sediments. The discussion describes how interactions between mercury and sulfur chemistry affect mercury speciation in the slurries, and how seasonal processes in the saltmarsh affect the net production of MeHg +.
ISSN:0045-6535
1879-1298
DOI:10.1016/S0045-6535(97)10042-X