polariten.
/ˈpəʊlərʌɪt/, U.S. /ˈpoʊləˌraɪt/ Now rare.
An insoluble, porous, granular material consisting chiefly of a mixture of iron oxide with other substances, formerly used in filter beds in sewage treatment.
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the world > the earth > minerals > types of mineral > other miscellaneous minerals > [noun] > mineral substances
quincite1835
atelestite1854
adamantoid1885
ferozone1888
polarite1889
petrichor1964
synroc1978
1889 Brit. Patent 8088 (1890) 2 The filtering material..is that now known as ‘Polarite’.
1898 Engineer. Mag. 16 157/1 The Purification of Sewage by the Ferrozone Polarite System.
1911 Science 20 Oct. 516/1 These remarks are especially applicable to so-called gravity filters in which the filtering material is composed of vegetable or animal charcoal, sand, spongy iron, magnetic carbide of iron, polarite and carferal.
1935 J. R. Baylis Elimination of Taste & Odor in Water xiv. 333 The water is then filtered through a bed of polarite and sand.
This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).
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n.1889