Iron and manganese are typical in many groundwater sources
and small closed water systems. If too much iron or manganese collects in these
systems, water can become darkened, and it looses some of its functionality.
Iron and manganese rich water can result in dirtying laundry that it is used to
clean, and to damage plumbing fixtures it flows through. In practice this means
a lot of negative complaints and hassle for water utility companies.
Water treatment facilities that have the problem of iron and
manganese have a few water solutions. They can attempt to remove the iron and manganese
using oxidation. This involves pumping oxygen through the water, and much like
iron left out in the rain, the metals will rust, and fall out of solution. Once
they become insoluble they will collect at the bottom of any container and can
easily be removed. Alternatively, water with iron and/or manganese can be
filtered.
Okay, but how do iron and manganese get in there in the
first place?
Small amounts of iron are often leached into the water by
the soil it originates in. Corrosive water can also pick up small levels of
iron if the pipes it flows through are iron based. Well water can also contain
iron. Although well water drawn from a pump or a faucet flows clear, if
dissolved iron is present and it is allowed to stand in a container for any
prolonged period of time, the iron will fall out of solution and settle on the
bottom as the particles dissolved near the top oxidize (rust).
Iron is notorious for staining laundry if it is present in
the water used to run washing machines, and manganese can have much the same
effect, leaving a brownish red color. Iron and manganese both can affect the
taste and consistency of beverages such as coffee and tea considerably. When
iron and manganese stain plumbing fixtures, or get on utensils and flatware,
serious problems can arise. Rusty brown stains are unable to be removed with
soap or detergent, and bleaches and alkaline builders such as sodium phosphate
often exacerbate the stains.
Given enough time iron and manganese buildup will occur in
water heaters, pressure tanks, and pipelines. This wont outright bust these
utilities, but will slow them down and drastically reduce their efficiency. If
iron and manganese are present in any considerable quantities, steps should be
taken to reduce iron and manganese presence, or at very least to reduce some of
the strain their presence will invariably have on the system they flow through.
Here’s what you can do:
Iron filters are becoming more and more accessible and more and
more efficient. These filters offered by prominent companies such as Fleck can
effectively remove most of iron found in water supplies. Manganese is a little
trickier, and may require a level of oxidation, but nonetheless can be taken
care of. A tray aerator can use the natural chemical properties of water to
take most of the iron and manganese out of solution, but can have a negative
effect of pressure and/or flow rate.
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| The buildup that can occur when iron and manganese are allowed to flow through a water system. |
Regardless of the solution you choose, keeping your water
free from excessive iron and manganese is of paramount importance, and should
be a serious concern for any homeowner.
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