potassium manganate


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potassium manganate

[pə′tas·ē·əm ′maŋ·gə‚nāt]
(inorganic chemistry)
K2MnO4 Water-soluble dark-green crystals, decomposing at 190°C; used as an analytical reagent, bleach, oxidizing agent, disinfectant, mordant for dyeing wool and in photography, printing, and water purification.
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In an environment that is neutral or close to neutral, and such environments usually occur in natural waters, for the oxidisation of Fe(II) ions occurring in bonds with organic substances, it is advantageous to use potassium manganate (VII), because Mn[O.sub.2] which improves the sedimentation of iron-organic agglomerates by acting both as the weight and the adsorbent (Krupinska et al.
The effects of the removal of pollutants from water after oxidisation using potassium manganate (VII)
The effects of the removal of pollutants from the water after oxidisation with potassium manganate (VII) showed that the precipitating manganese (IV) oxide increased the effectiveness of the removal of pollutants from the water.
The lack of any increase in the pH in water after oxidisation with potassium manganate (VII) additionally precipitated manganese (IV) oxide was, on the other hand, favourable in terms of the removal of the organic substances.
The application of aeration before the coagulation process was the most effective in view of the removal of iron compounds, and potassium manganate (VII)--with regards to reducing the colour, turbidity and concentrations of the total organic carbon and manganese.
The application of potassium manganate (VII) for oxidation of Fe (II) ions produced the best results in terms of reduction in colour, turbidity and concentration of manganese and organic substances.
This regularity was not observed when hydrogen peroxide and potassium manganate (VII) was used to oxidise Fe (II).