How to Precipitate Iron From Water

Iron bacteria or corrosion are likely to blame when rusty water and stains continue after an appropriate and thorough treatment. Iron bacteria may feed on iron and store it in their sheaths even if the iron level of the water is low. Furthermore, iron bacteria may absorb iron from steel pipes. Occasionally, a bacterial slime buildup breaks apart, resulting in the release of highly murky water.

Microscopically, the presence of iron bacteria may be detected. Slimy reddish-brown growths have also been seen in the flush tanks of water closets. If you are wondering how to precipitate iron from water, you are in the right place.

How Iron Is Found in Water

Ferrous iron

Clearwater iron" is a term used to describe ferrous iron. Because ferrous iron is soluble, it is undetectable to the naked eye and CAN NOT be filtered out. (It is dissolved in the water) If your water contains ferrous iron, you may not notice until red stains appear below the water line in toilet tanks and other areas where water has been stagnant for a long time. This is because ferrous iron has a tendency to oxidize when exposed to air. When water evaporates on surfaces contacted by water, the unattractive iron stain residue is left behind, as seen in the photographs below of the toilet bowl and shower wall.

Ferric iron

Ferric iron, sometimes known as "orange water iron," is a tiny particle similar to rust found in well water. Because ferric iron is solid, it, like any other contaminant in your water, must be filtered away. Ferric iron is a kind of iron that occurs in your house as a result of oxidation and may be seen in bathroom fixtures.

Colloidal iron

Colloidal iron resembles orange-water iron in appearance, but it will not settle out if left in a glass overnight. Occasionally, oxidized iron produces very tiny solid particles with diameters ranging from 0.1 to 0.001 micron. This ultra-fine iron is frequently found in solutions with anions or organic substances. Most traditional filters are ineffective due to the tiny size of these particles. Ultra or nano filters created by professionals are particularly successful at eliminating the majority of these incredibly small particles.

Organic iron

Another form of iron found in wells is organic iron. Because a form of slime bacterium feeds on the iron in the aquifers supplying the well, it's frequently referred to as bacterial iron. The iron and bacteria are introduced into the home's water distribution system by the good pump. Holding a clear glass filled with tap water against a strong light can reveal a murky color caused by organic iron that has not been treated. Organic iron can occasionally be detected as a glob of orange-colored gelatin in a calm spot of the toilet tank. If chlorine bleach is utilized in the laundry cycle, organic iron will leave a lot of stains on your clothes.

How to Precipitate Iron From Water

The approach below is efficient in killing iron bacteria that have already entered the pipe system. It can be used regularly if necessary, however, it's best used after actions have been made to prevent the germs from spreading:
1. Fill the well with about a half-gallon of sodium hypochlorite (household bleach). It may be feasible to add the liquid through the breather pipe in some wells. It may be essential to remove the good seal in some cases. Fill the well with many gallons of water to rinse the bleach down to the water level.
2. Open each home tap one at a time, letting the water run until a chlorine stench emerges. Close that tap and go through the process again with the next one. Fill the plumbing system with chlorinated water until it is completely full.
3. The chlorinated water should be properly drained from the whole system after around 12 hours of contact time. There will be a lot of crimson water drained out. The flushing of the water heater should be given special care, and draining the heater is recommended.

Treatment for Ferrous Iron

If all of the iron in the water is soluble, you'll need a professional water test to be sure; otherwise, it's a "hardness mineral" that may be removed with a water softener. The ion exchange mechanism is just as effective at eliminating ferrous iron as it is at removing calcium and magnesium. Because iron adheres to resin beads more firmly than soluble iron, most water softeners can't manage soluble iron over time and get contaminated.
Iron fouling of the resin bed and valve damage is common in single-tank softener systems that employ hard, iron-filled water for regeneration and cleaning. The trapped ferrous iron inside the resin bed oxidizes to insoluble ferric iron, which sinks to the bottom.

Treatment for Ferric Iron

Normal ferric "orange water" iron is a small particle (rust) that causes the water to be colored. Filtration is the most effective method for eliminating these, as well as any sand, mica, grit, or sediment that may be present in your well water. A chemical-free backwashing filter is a preferable filtering alternative if the levels are high. Like softeners, backwashing filters have in-service and backwashing cycles. The filters, on the other hand, employ a different medium and do not require any salt. The collected particle is just washed down the drain with water.

One approach involves oxidizing the water to convert all ferrous iron to ferric iron, then filtering it. Chemical injection, catalytic medium, or aeration are all options for oxidation. It is possible to filter the iron once it has reached the ferric condition.

The second and preferred technique is to filter the water first with a cartridge or backwashing filter, then with a water softener.

Treatment for Colloidal Iron

During testing, we frequently discover that a small amount of iron oxide goes through traditional filters and never settles out. This is particularly frequent in shallow wells and with chlorinated water. An Ultra-filtration system is required to remove ultra-fine iron. The UF systems range from simple 0.5-micron cartridge filters to big cartridge filters that reach down to 0.20 microns.


Pure water is always needed for ensuring the best health for your family. And to ensure that, you must have the best water filtration system to precipitate the iron present in your water. Buy the best water filters from Water shop bd and ensure iron-free healthy water for your household.

Similar Posts