Geochemical Behavior of Barium in the Vicinity of a MnO2/Mn2+ Redox Front Formed in a Eutrophic Lake.
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概要
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In a eutrophic lake, the southern basin of Lake Biwa, the vertical distribution of barium shows a distinctive pattern : Concentrations of barium in both particulate and dissolved forms reach a maximum at a depth around the thermocline. The depth at which the peak appears coincides well with that at which particulate manganese accumulates. These characteristics of the geochemical behavior of barium are discus-sed in relation to its adsorption onto hydrous manganese oxide and the manganese redox cycle, namely, the reduction of MnO<SUB>2</SUB> to Mn<SUP>2+</SUP> in the anoxic hypolimnion, and the reoxidation of the Mn<SUP>2+</SUP> to MnO<SUB>2</SUB> in the oxic epilimnion. The contiguity of the anoxic and oxic waters, for which the term "MnO<SUB>2</SUB>/Mn<SUP>2+</SUP> redox front" is adopted, is specifically noted.
- 日本陸水学会の論文
日本陸水学会 | 論文
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