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Q » How does greensand filtration remove iron and manganese?
03 Nov, 2025
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A » Greensand filtration removes iron and manganese through a combination of oxidation and filtration. The greensand, coated with manganese dioxide, acts as a catalyst, oxidizing dissolved iron and manganese into insoluble forms. These insoluble particles are then trapped in the filter bed, effectively removing them from the water. Periodic regeneration with a potassium permanganate solution restores the filter's capacity to continue this process efficiently.
03 Nov, 2025
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