Iron Removal by Softening Resins

The removal of insoluble ferric iron by water softeners can be problematic. Softening resins filter to approximately two microns in size but ferric iron particles are often smaller than one micron.Depending on particle size, flowrate and resin size and uniformity, removal can be as little as 10 percent or as much as 90 percent with 25- to 75-percent removal more typical. Fine-mesh resins do better than larger resins.

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