Iron is measured as ferrous (Fe2+) or ferric (Fe3+). Sources for iron contamination are raw water or corrosion in condensate or circulating water. Iron can deposit in lines or on heat transfer surfaces. It is important to let the sample rune before collecting to prevent the collection of rust when the sample valve is opened. Iron is normally reported as ppm Fe.
Iron may be removed from water by:
- Aeration and filtering
- Coagulation and filtering
- Cation exchange
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