Is the sulfur from iron-sulfide captured by a water softener?

by Chris
(Rindge, NH)

I have a water softener primarily for removing clear iron and manganese with slight hardness (3.5 gpg hardness as CaCO3, 1.4 ppm Fe and 0.45 ppm Mn).

After installing a new water softener (NaCl with zeolite resin), I am experiencing a strong sulfur odor.

My old softener left a very slight odor that was effectively neutralized by an activated carbon filter after the softener, but the odor is much stronger with the new softener and can't be removed by the filter. I believe the old softener was grossly undersized.

Does the resin capture iron and release sulfur gas or does the sulfur gas get captured on the resin surface along with the iron?

Is it possible the new softener is doing a much better job capturing iron and therefore releasing much more sulfur gas? If so, what do I need to do to get rid of the sulfur smell?

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Is the sulfur from iron-sulfide captured by a water softener?

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Apr 21, 2012
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recent sulphur odor NEW
by: Anonymous

house on market to sell vacant 3 months. recently developed sulphur odor . treated well with chlorine and water straight from well is fine.No odor at holding tank when drained. however in house water at softner wreaks. and whole house water filter canisters are like a black almost oily substance in them. water goes from holding tank to softner to 2- 5ppm filters 1- carbon filter then through uv light then into home .Have always had manganese iron in water .that is reason for the system i have currently . New problem just started after 20 years of living there?????

Jan 29, 2011
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Sulfur smell
by: RJ - H2O Services

Chris, The origin of the H2S can not be determined without a comprehensive water analysis. Is there an odor present in the untreated water?
If it is Iron sulfide the same reaction occurs when the acids in the resin cleaning salts react with the sulfides and cause H2S to be released.
RJ

Jan 29, 2011
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Hydrogen Sulfide or Iron Sulfide?
by: Chris

RJ - You have assumed the sulfur is from Hydrogen Sulfide. Isn't it just as likely to be the sulfur released from the iron sulfide when the iron is captured on the resin and the sulfur is released as a gas? How can one determine the origin of the sulfur?

Jan 29, 2011
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Sulfur problem
by: RJ-H2OServices

Chris, the hydrogen sulfide is not caused by the iron in the water. Hydrogen sulfide varies a great deal. Season to season and even on a daily basis.
If you are using softener salt with additives such as red out, system saver or any salts with additives to clean the resin. These additives can compound the sulfur problem as it oxidizes the H2S on to the resin and fouls the resin beads. The H2S is then released when the water is run. Manganese can also release similar type smells as H2S.
Inline carbon filters are a temporary solution at best (as you know).
A permanent solution would be to add an iron filter before the softener. A hydrogen peroxide based or manganese greensand based iron filter would be good options in this application. Then sanitize the softener.
RJ

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