Manganese in lakes

Takamatsu, T., Kawashima, M. and Koyama, M. (1985). The role of Mn-rich hydrous manganese oxide in the accumulation of arsenic in lake sediments. Water Res. 19,1029-1032. 

P.R.58 4 is primarily used in general industrial paints, where its full shade and related shades are of interest. This is also true for other manganese pigment lakes. In full shade, P.R.58 4 affords deep carmine shades, but white reductions provide only very dull, bluish shades of red. The pigment is fast to organic solvents and... 

York and New England are devoid of fish due to the effects of acid rain. Indirect effects of the low pH values associated with acid rain also affect organisms. As noted in Table 13.1, one of the properties of an acid is the ability to dissolve certain metals. This has a profound effect on soil subjected to acid rain. Acid rain can mobilize metal ions such as aluminum, iron, and manganese in the basin surrounding a lake. This not only depletes the soil of these cations disrupting nutrient uptake in plants, but also introduces toxic metals into the aquatic system. 

The occurrence of anoxic conditions causes cycling of iron and manganese at the oxic-anoxic interface (6-10). In lakes with a significant seasonal cycle, iron and manganese oxides are reduced during anoxia, and Fe(II) and Mn(II) are released into solution. The Fe(II) and Mn(II) species are reoxidized, and Fe(III) and Mn(III,IV) precipitate as oxides during lake overturn, when the reduced species come into contact with oxygen. 

The oxidation of As(III) to As(V) by oxygen is a rather slow process (68, 72). The oxidation of As(III) to As(V) was, however, shown to occur readily by reactions with manganese oxides (19, 20, 73). For the conditions encountered in Lake Greifen, the oxidation of As(III) by manganese oxides is likely to be an important oxidation mechanism. The role of iron oxides in... 

Hsiung Tisue Manganese Dynamics in Lake Richard B. Russell... 

Both of these reactions are thermodynamically feasible in neutral solution and could play a role in Mn dynamics throughout the water column. However, we were unable to detect H202 in Lake RBR even with the luminol chemiluminescent method (31). Manganese in seawater acts as an effective scavenger of superoxide, whose disproportionation it also catalyzes. 

Jackson, T.A. and Bistricki, T. (1995) Selective scavenging of copper, zinc, lead, and arsenic by iron and manganese oxyhydroxide coatings on plankton in lakes polluted with mine and smelter wastes results of energy dispersive X-ray micro- analysis. Journal of Geochemical Exploration, 52(1-2), 97-125. 

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