Fe & Mn under 1 ppm but still over limits for drinking water

[Judy.M]

Hello all,

Would you please share your opinion what solution would be the best for well water which has these parameters?

Fe 0.22 mg/l
Mn 0.374 mg/l
pH 7.11
KNK 4,5 2.35 mmol/l
CHSK Mn 0.05 mg/l
Total hardness 1.05 mmol/l
Dissolved solids (105 °C) 190 mg/l
Cl- 1.70 mg/l
PO4 3- 0.44 mg/l
NO3- < 1.00
NO2- 0.014 mg/l
NH4+ 0.01 mg/l
No issues with bacteria

The water looks completely clear after filling but after a few hours it changes slightly to yellow-grey color. There are yellow stains in sinks, shower corner and muddy deposits in pipes after 6 months of using it. It has no odour, only warm or hot water coming through boiler has egg odour. It tastes a bit metallic but it is drinkable of sorts.

I have decided to buy a filter which will help me to get rid of the iron and manganese but I do not know which would be the best and most effective from longer point of view. I want the backwash water to use for irrigation of lawns and hedge in the garden so it should not contain much of chlorine or salt, I guess.

First I liked oxidation with ozone but found out that there are nearly no products for use at home. Than I thought of H2O2 but it is not right for manganese. So it remains only oxidation with air, chlorine, permanganate or using of a softener with salt. I also do not know if a coated grains like Greensand would be sufficient or rather manganese dioxide should be used for such smaller amounts.

Thank you very much for your help,
Judy

 

[Reach4]

Mn 0.374 mg/l is a nasty amount of manganese, not a small amount. Did you mean Mg (magnesium), I hope?

Then you referred to CHSK Mn 0.05 mg/l. What is that? That would be a much more tolerable number if that is your Mn. What is CHSK?

With 0.05 mg/l Mn and Fe 0.22 mg/l and 6 grains hardness, a full size softener (1.5 cubic ft of resin and 10x54 inch tank) would probably do it for a house. I am not a pro, and maybe there are factors I am missing. If the Mn is 0.374 mg/l, then I am not sure.

If you really want to use the backwash water for your yard, then maybe Katalox Light could do it for the Mn and the Fe. I don't know what oxidants you might need to add for that. Air would seem good for putting the backwash into the yard.

For those reading along, 1.05 mmol/l hardness is about 6 grains.

 

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[Terry]

Judy,
I deleted the account before seeing it was a real question. Go ahead and sign back up if you want to continue the questions and answers.
Terry Love

 

[Judy.M]

Heslo Terry, thank you, I am back.

Reach4,
Unfortunatelly, Mn 0.374 mg/l is really manganese. I stopped considering it now as a small amount. CHSK Mn should be chemical oxygen demand.

 

[Judy.M]

Hello,

Please do you think a softener based on ion-exchange would be the best solution for my problem above (Fe 0.22 mg/l, Mn 0.374 mg/l, pH 7.11)?

Thank you,