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Chalcophile elements, various

Mercury occurs in soils predominantly in the +2 oxidation state. Elemental Hg in the atmosphere is oxidized to Hg + and deposited in rainfall. It is a strong chalcophile and under anaerobic conditions forms the extremely insoluble sulfide cinnabar (HgS, pK = 52.7). Nonetheless it is not entirely immobilized under anaerobic conditions because it is reduced to volatile Hg° or methylated to volatile methyl mercury compounds by microbial action, and so returned to the atmosphere. The methylation is mediated by various bacteria, especially methanogens, through the reactions ... [Pg.226]

See other pages where Chalcophile elements, various is mentioned: [Pg.43]    [Pg.706]    [Pg.1256]    [Pg.2]    [Pg.559]    [Pg.234]    [Pg.5]    [Pg.11]    [Pg.328]    [Pg.7]   


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Chalcophile

Chalcophile elements

Chalcophiles

Chalcophilic

Chalcophilic elements

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