Yes, greensand does remove iron from water.
Greensand, specifically used in Greensand Iron Removal Filters, is a well-established method for tackling iron contamination in water supplies, particularly common in well water systems.
How Greensand Filters Work to Remove Iron
Greensand filters utilize a specialized filter media called manganese greensand. This media has properties that allow it to remove dissolved iron (ferrous iron) by oxidizing it into a solid particle (ferric iron). These solid particles are then physically filtered out by the media bed.
According to the reference provided:
"Greensand Iron Removal Filters will remove, Iron, Manganese and Sulfur."
This highlights its effectiveness not only for iron but also for other common well water issues.
What Greensand Removes
A Greensand filter system is effective against multiple contaminants often found together in well water:
- Iron: Removes both dissolved and precipitated iron.
- Manganese: Similar to iron, it oxidizes and filters out manganese.
- Sulfur: Can remove hydrogen sulfide (which causes a "rotten egg" smell) through oxidation.
Here's a quick look at the primary contaminants addressed:
| Contaminant | Form Removed |
|---|---|
| Iron | Dissolved (Ferrous) & Solid (Ferric) |
| Manganese | Dissolved & Solid |
| Sulfur | Hydrogen Sulfide |
Applications and System Types
Greensand filters are primarily used on well water supplies, where these contaminants are frequently present.
The systems can be configured to meet varying demands:
- Single Tank: Standard setup for typical residential use.
- Duplex: Two tanks working together, often for higher flow rates or continuous treated water supply during regeneration.
- Triplex: Three tanks for even larger capacities or specific industrial applications.
Using a greensand filter system is a practical solution for homeowners dealing with stained fixtures, metallic-tasting water, or unpleasant sulfur odors caused by these minerals and gases. The media requires periodic regeneration (often with potassium permanganate) to maintain its oxidizing capacity and flush out the filtered contaminants.
