| 摘要 |
The invention concerns a method for treating water particularly in order to decrease its iron, manganese and arsenic content. The invention is characterized in that it comprises at least one step which consists in causing the water to pass on at least a bed of filtering material ( 3 ) comprising a combination: of at least one finely-divided material based on iron in hydroxide or oxide state or in metallic state in the form of particles of dimensions ranging between 0.3 and 2 mm, of manganese dioxide grains having a bulk specific gravity of the order of 2 and a hardness higher than 6 on the Mohs scale.
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