How to remove Nitrate, Iron and Manganese from water?

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We have elevated nitrate, iron and manganese levels in our borehole water. The concentration of these elements is higher than recommended by the WHO drinking water guidelines. 

Could someone please suggest a simple removal process for nitrate, iron and manganese? Is it possible to get rid of these elements in a one-step filtration process? Is there a household treatment method for removing all these three elements? 

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18 Answers

  3. Yes, please email me at andrew@waterandoilsolutions.com.au

    My company has developed an effective one-step filtration process that is being used to supply drinking water to over 2,000,000 people in developing countries across Asia as of this year.

     

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  6. In principle Fe and Mn can be removed in a two stages process: oxidation to particulate form of the metal ions and subsequent removal through filtration. Oxidation will not help NO3 removal wich could be removed through ion exchange resin columns. You are asking for a one-step process though. A sequential Anion / Cation resin bed or a mixed bed could be a one-step 'filtration' unit. RO Membrane could be another one-step process. Regeneration of the resins and RO membrane fouling by metals should be taken under consideration though.

  7. Is it poss, that these elements,IE ​nitrate, iron ​and manganese,aluminium,strontium and barium are from aerial spraying related to SRM (solar radiation management,and spraying coal ash into the stratosphere etc,.Just thinking .If they are nano particles then another means of filtration will be required.

  8. Bonjour je verrais plutôt de faire une recherche sur l'origine de l'infiltration de ces éléments dans la veine d'eau souterraine. car c'est plus facile de l'éliminer si on trouve son origine.

    Aujourd'hui il s'agit de ces trois composants mais demain peuvent venir s'en ajouter d'autres

     

    Hello I would rather do a search about the origin of the infiltration of these elements in the vein of groundwater. because it's easier to eliminate it if we find its origin.

    Today it is these three components but tomorrow can be added to other

  9. Hi Amama. It is important to the flow of treatment to assess the scale factor of the process to apply, but you should also consider the treatment of rejections concentrates, especially iron and manganese. If we do not consider reverse osmosis, it is not easy to remove the three contaminants at one stage.
    For nitrates the ion exchange works very well, completing with coagulation filtration, but there are also some adsorption resins that work very well with iron - manganese removal as is Katalox - Light. Today, in addition to a strong evolution of biological processes of iron - manganese removal and others like arsenic (see Degremont leaflets). There are many variables to consider in choosing the right combination for the removal of these contaminants.

    1 Comment

    1. You cannot use RO if the water ciontains Fe and Mn as they will poison the membrane. Also when you say coagulation what exactly are you going to coagulate, If Fe is divalent (Fe++) then you need to oxidise it first befiore you can filter it, and it doesn't need a coagulant as a simple SAND-FILTER will do the work just fine.  

  11. Dear Amama

    Iron and manganese can be effectively removed from water using a number of treatment processes depending on both the form and concentration of the metals. Since iron and manganese are aesthetic problems that affect all potential uses of the water, they must be removed from all water entering the home using Point-of-Entry (POE) treatment devices.

     

    1. Water Softening (Ion Exchange)
    2. Polyphosphate Addition
    3. Oxidizing Filters.
    4. Oxidation Followed by Filtration

  13. Nitrate can be removed by using special ION-EXCHABNGE RESINS which exchange NO3- with Na+. The resins , upon saturation can regenerated with saturated NaCl solution. 

    Fe and Mn are removed by oxidation using a catalyst called BIRM which accelerates the reaction.

    The reaction produces their oxides which can be retained by using a SAND-FILTER.

    Prior to oxidation the water must be fed with excess air using a small air compressor.

    If you need further details please let me know. 

  14. The simplest way to remove Fe and Mn is by aeration and filtration. These elements tend to quickly drop out of solution when groundwater is oxygenated. The appearance of black particles and red/brown sludge will indicate successful removal.

    Nitrate concentration may be reduced in this process if bacteriological factors are favourable. Passing the water through an ion exchange column can significantly reduce concentration of nitrates.

    1 Comment

    1. Dear Adam, 

      In order to oxidise Fe and Mn you need to accelerate the oxidation reaction by some kind of catalyst, otherwise it will take ages. 

  15. hi friend so you can plant Vetiver plant then its really remove nitrate, Iron and other solvent so pls if you really interest pls send me mail and also its so cheapest procedure

    my mail is  stagenpl@gmail.com

  16. Natural zeolite filter media usually solves this problem cost effectively.

    2 Comments

    1. Not really as natural Zeolite can exchange its Na+ ions with Ca++ and Mg++ ions. That's why it was first used for water softening processes. In order to reduce the NO3- concentration you should a filter media that has available Anions that can be exchanged with NO3- ions. These are ION EXCHANGE RESINS that they have, mainly, Cl- ions available.

      Fe and Mn can not be removed by ZEOLITE.