ferrate

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fer·rate

 (fĕr′āt′)
n.

ferrate

(ˈfɛreɪt)
n
(Chemistry) a salt containing the divalent ion, FeO42–. Ferrates are derivatives of the hypothetical acid H2FeO4
[C19: from Latin ferrum iron]

fer•rate

(ˈfɛr eɪt)

n.
a salt of the hypothetical ferric acid, H2FeO4.

fer·rate

(fĕr′āt′)
A compound containing ferric oxide and another oxide.
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In this reference for scientists, international contributors describe technologies and techniques for removing organic and inorganic contaminants from water, with special attention paid to remediation of arsenic contamination, as well as remediation methods for various water contaminants including ferrates, copper, slag, nitrates, hydroxyl radical, and ozone.
The addition of soda and calcium oxide convert iron, silica and titania impurities into insoluble sodium and calcium ferrates, silicates as well as sodium titanate.
The high point of our holiday, quite literally, was a day spent on the Vies Ferrates - the 'iron ways' - near the village of Ordino.