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Ferrate
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<p>Ferrate loosely refers to a material that can be viewed as containing anionic <a href="/facts/Iron/QK1JYy8E">iron</a> complexes. Examples include tetrachloroferrate , oxyanions (<a href="/facts/Ferrate(VI)/AR1Dlak6">FeO2−4</a>), <a href="/facts/Disodium_tetracarbonylferrate/mSmnprRW">tetracarbonylferrate</a> ([Fe(CO)4]2−), the organoferrates. The term ferrate derives from <a href="/facts/Latin_language/pM3Kge85">Latin</a> <i> ferrum</i> 'iron'. Some ferrates are called super-iron by some and have uses in battery applications and as an oxidizer. It can be used to clean water safely from a wide range of pollutants, including viruses, microbes, arsenic, sulfur-containing compounds, cyanides and other nitrogen-containing contaminants, many organic compounds, and algae. </p>