Water Treatment Specialists
Disinfection Systems
Intec-America

Iron Removal

Products Category

  • Chemical Free Pool
  • Chemical Free Pools
  • Chlorine Allergy
  • Chlorine Alternative
  • Chlorine Free Pool
  • Chlorine Free Pools
  • Chlorine Substitute
  • Copper Ionization
  • Hydrogen Sulfide
  • Ionization
  • Ionized Pools
  • Iron Removal
  • Non chlorinated pool
  • Nonchlorinated Pools
  • Nonchlorinated pool
  • Non chlorinated Pools
  • Pool Water Sanitizer
  • Poultry Water
  • Salt Water Chlorinator
  • Salt Water Generator
  • Salt Water Pool
  • Salt Water Pools
  • Swimming Pool
  • Swimming Pools
  • Water Filtration
  • Water Treatment
  • Whole House Filters

  •  
    Iron Removal

    Iron is known to leach into water supplies throughout the United States from rock and soil formations. It has been said, probably an exaggeration, that there is hardly a square foot of soil that does not have some iron content. Iron is at least 5% of the earth's crust.

    A yellow to reddish discoloration can appear in water in concentrations as low as 0.3 ppm (parts per million) and begin the staining and scale process, depending on the pH, as well as taste and odor problems.

    Five types of iron that can be found in potable water

    Sequestered Iron
    Sequestering agents are used by municipalities & industry for treatment of large quantities of water. It is not important to farming where private wells are the principal source of water.

    Heme iron-- Iron Found in organics
    This type of iron can not be removed by softening resins. Heme iron is most common in surface water and shallow wells. It is usually a yellow / brown color. Heme iron is a breakdown product of dead vegetation.

    The iron and organics (tannins) require one ppm of sodium hypochlorite and a retention time of 20 to 25 minutes in a pH range of 6.5 - 7.5. Following the oxidation, a filtration media must be used to remove the oxidized iron and the residual of chlorine.

    Iron Bacteria
    Favorable conditions for the growth of Crenothrix, Gallionella, and Clonothrix (or "iron bacteria") can exist at very low levels of iron. Oxygen creates an oxidizing energy to precipitate ferrous iron into bicarbonate that is necessary for iron bacteria to exist. This bacterium can now live in a very wide range of conditions.

    Iron bacteria water will have a reddish color and an objectionable odor. These organisms's growths cause a jelly-like bio-mass. This mass can render media and resin filtration ineffective, reduce the effectiveness of any oxidizing agent, and plumbing fixtures. Iron bacteria is, because of its organic nature, the most difficult to remove and control.

    Ozonation is the recommended solution to this problem.

    Ferric Iron-- Red water iron
    In nature, iron is usually found in its oxidized insoluble form. Clear water iron, or soluble iron, once exposed to an oxidant or to oxygen will precipitate into an insoluble hydroxide form usually yellowish or reddish in color. This iron, while in the clear water state, could be removed by softening resins or by activated multi-media filtration. If one uses a 5-25 micron filter it may pack out in a short time and reduce flow and pressure. Changing these filters then become expensive and time consuming. Multi-media filters are more expensive to purchase upfront but the cost per gallon of water filtered is much less and requires little or no time.

    Filtration is the recommended solution.

    Ferrous Iron-- Clear water iron
    Sometimes this iron is called ferrous bicarbonate iron. This iron may be removed by a softening resin with a positive charge; however, it must be in the invisible soluble form until it is filtered. To prevent the iron from precipitating to its insoluble form frequent regenerations are necessary. If the iron does precipitate, fouling on the resin surface will occur, as well as within the matrix of the bead. This fouling can be minimized by pre-treating the incoming water with an activated carbon filter or by adding chemical cleaners to the brine or potassium regenerate. There are a number of chemical cleaners that will reduce red water iron to clear water iron. These cleaners are necessary when iron levels are high and normally they do not harm the resins. Many filter medias available today oxidize ferrous iron into ferric iron which can then be removed physically.

    Softening is the recommended solution.



    Chlorine Free Pools | Chemical Free Pools | Ionization | Ionized Pools | Copper Ionization | Water Treatment | Salt Water Pool
    Nonchlorinated Pools | Non chlorinated Pools | Swimming Pools | Water Filtration | Iron Removal | Hydrogen Sulfide
    Hydrogen Sulfide | Chlorine Alternative | Whole House Filters


    © Intec America Corp. 2007 | info@intec-america.com | Design by 1stCo Sitemap

    Search Engine Optimization and Website Development provided by BeSproutSEO.com