Iron Bacteria


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iron bacteria

[′ī·ərn bak′tir·ē·ə]
(microbiology)
The common name for bacteria capable of oxidizing ferrous iron to the ferric state.

Iron Bacteria

 

bacteria that are able to oxidize ferrous iron compounds and to use the energy thus liberated to assimilate carbon from carbon dioxide or carbonates. The equation for the oxidation is

4Fe(HCO3)2 + 6H2O + O2 = 4Fe(OH)3 +4H2CO3 + 4CO2

In this reaction a small amount of energy is liberated; there-fore, iron bacteria oxidize a large amount of ferrous iron.

The iron bacterium whose physiology and biochemistry has been studied the most thoroughly is the nonsporiferous, mobile bacillus Thiobacillus ferrooxidans, which also oxidizes sulfur. The iron bacteria also include some thread bacteria of the species Leptothrix, with thick rust-colored capsules (sheaths) containing hydrated iron oxide, and Gallionella, which consists of clusters of extremely fine threads (0.01 micron) twisted into spirals, forming pedicles on whose surface hydrated iron oxide is deposited. Iron bacteria live in fresh and salty bodies of water and play a large role in the iron cycle in nature. On the bottoms of bodies of water, iron bacteria form dark brown disk-shaped concretions consisting of iron and manganese.

A. A. IMSHENETSKII

References in periodicals archive ?
Previous studies have shown that iron bacteria A can decompose nutrients through enzyme catalytic reaction, eventually forming iron-based complexes which have great similarities with ferric hydroxide, as well as excellent reactivity and adsorbability (10).
Iron bacteria A was isolated from soil by using standard culture medium which consisted of the following: ferric ammonium citrate, magnesium sulfate, ferrous ammonium sulfate, dipotassium hydrogen phosphate, calcium chloride, and sodium nitrate, PH 6.
When the iron bacteria A was in the process of cultivating at 30[degrees]C and 180 rpm, the growth characteristics were monitored through dilution plate count method (Fig.
In order to investigate the mechanism of deposition of heavy metals by iron bacteria, two conical flasks of 300 ml, numbered I and II, were used for liquid experiments.
Co-precipitated products from iron bacteria and heavy metals also had poor crystallinity and contained large amounts of amorphous materials(as shown in Fig 7, 8).
Water quality is critical when dealing with groundwater, so the Multifilm system filters it for sediment and sulfur and iron bacteria.
The city engineer then related that one or both of the milk company wells was found to be "contaminated by iron bacteria.
It is an excellent bactericide and therefore may be effective in treating wells with iron bacteria problems.
This element is a strong oxidizing agent and is used widely to limit iron bacteria growth.
In addition, it has been used quite successfully to treat iron bacteria problems.
Five different PurTest(R) water testing kits allow consumers to easily test for bacteria, lead, pesticides, nitrates, nitrites, iron, hardness, pH, copper, iron bacteria, hydrogen, sulfide, chlorine and alkalinity.
Pollution of water wells caused by iron bacteria can block filters, which leads to the quantity of water decreasing until it stops the pump.