| 摘要 |
<p>The method for treating water to remove undesirable metals such as iron, manganese, arsenic and nickel, comprises passing the water over a bed of filter material consisting partly of manganese dioxide granules and depositing a material comprising a manganese compound in an upstream of the bed. The manganese compound is partially soluble in the treated water. The manganese compound is deposited in a surface of the filter material or a compartment located in an upstream of the filter material, before and/or during the passage of the water. The method for treating water to remove undesirable metals such as iron, manganese, arsenic and nickel, comprises passing the water over a bed of filter material consisting partly of manganese dioxide granules and depositing a material comprising a manganese compound in an upstream of the bed. The manganese compound is partially soluble in the treated water. The manganese compound is deposited in a surface of the filter material or a compartment located in an upstream of the filter material, before and/or during the passage of the water. Thickness of the filter material allows a redeposition of an active oxide layer in a downstream of the bed. Oxidation-reduction potential (0.200-0.300 V) and the pH (6-7) of the water are adjusted before and/or during the passage on the manganese oxide and the bed.</p> |
