Iron removal from borehole water
Iron removal from borehole water
(OP)
Approx 8 yrs ago i had a pool built and noticed that the water from the borehole contained high levels of iron. The iron was removed from the pool water using a hired filtration system but it still left brown staining on the liner which took a forever to remove. Recently the pool was emptied and an Automatic top up system was introduced. Now i am worried that the liner will be stained when refilled. I intended to use manganese greensand as the filter media but when i checked the cost it was over £625.00 per 25lb bag. Is there a more cost effective alternative. The house has a completly separate water filtration system (Kinetico)which could not handle the volume of water the pool requires.
Thanks for taking a look. I hope someone could help on this matter
Thanks for taking a look. I hope someone could help on this matter





RE: Iron removal from borehole water
Orenda
RE: Iron removal from borehole water
RE: Iron removal from borehole water
RE: Iron removal from borehole water
Generally this removal procedure does not work because pool water pH is not sufficiently high to drive the oxidation of iron compounds to the insoluble hydroxide state.
Orenda
RE: Iron removal from borehole water
I would have to disagree. The pool water is highly ozygenated which would surely oxidized practically all the iron to insoluble form.
Chlorine will oxidize iron in 15 minutes at a pH of 5.
How to treat and/or prevent an iron stain: To treat these stains, use a sequestering or chelating agent, which helps hold the iron in solution and create filterable particles.
The recirculating pool filter will eventally remove all of the iron.
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RE: Iron removal from borehole water
In my twenty-some years of pool water chemistry and treatment, I have yet to see a case in a pool water environment where chlorine as hypochlorus acid (or diatomic oxygen) will oxidize iron compounds to an insoluble state which can then be removed by filtration, any more than Jack Bean's commects about sequestration/chelation producing filterable particles (which is an oxymoron).
The solution with iron, copper and manganese staining is chelation to maintain a water soluble form of the metals and inhibit stain formation.
Orenda
RE: Iron removal from borehole water
Gary Schreiber, CWS VI
The Purolite Co.
RE: Iron removal from borehole water