A sample of food-grade diatomaceous earthScanning electron micrograph of diatomaceous earth
Diatomaceous earth (/ˌdaɪ.ətəˈmeɪʃəs/DY-ə-tə-MAY-shəs), diatomite (/daɪˈætəmaɪt/dy-AT-ə-myte), celite or kieselgur/kieselguhr is a naturally occurring, soft, siliceous sedimentary rock that can be crumbled into a fine white to off-white powder. It has a particle size ranging from more than 3 mm to less than 1 μm, but typically 10 to 200 μm.[1] Depending on the granularity, this powder can have an abrasive feel, similar to pumice powder, and has a low density as a result of its high porosity. The typical chemical composition of oven-dried diatomaceous earth is 80–90% silica, with 2–4% alumina (attributed mostly to clay minerals), and 0.5–2% iron oxide.[2]
Diatomaceous earth consists of the fossilized remains of diatoms, a type of hard-shelled microalgae.[3] It is used as a filtration aid, mild abrasive in products including metal polishes and toothpaste, mechanical insecticide, absorbent for liquids, matting agent for coatings, reinforcing filler in plastics and rubber, anti-block in plastic films, porous support for chemical catalysts, cat litter, activator in coagulation studies, a stabilizing component of dynamite, a thermal insulator, and a soil for potted plants and trees as in the art of bonsai.[4][5] It is also used in gas chromatography packed columns made with glass or metal as stationary phase.
^Dobrosielska, Marta; Dobrucka, Renata; Brząkalski, Dariusz; Frydrych, Miłosz; Kozera, Paulina; Wieczorek, Monika; Jałbrzykowski, Marek; Kurzydłowski, Krzysztof J.; Przekop, Robert E. (May 18, 2022). "Influence of Diatomaceous Earth Particle Size on Mechanical Properties of PLA/Diatomaceous Earth Composites". Materials. 15 (10): 3607. Bibcode:2022Mate...15.3607D. doi:10.3390/ma15103607. ISSN 1996-1944. PMC 9145730. PMID 35629631.
^Antonides, Lloyd E. (1997). Diatomite(PDF). USGS. Retrieved December 12, 2010.
^Rojht, Helena; Horvat, Aleksander; Athanassiou, Christos G.; Vayias, Bill J.; Tomanović, Željko; Trdan, Stanislav (2010–2012). "Impact of geochemical composition of diatomaceous earth on its insecticidal activity against adults of Sitophilus oryzae (L.) (Coleoptera: Curculionidae)". Journal of Pest Science. 83 (4): 429–436. doi:10.1007/s10340-010-0313-6. ISSN 1612-4758. S2CID 23110767.
^Reka, Arianit A.; Pavlovski, Blagoj; Ademi, Egzon; Jashari, Ahmed; Boev, Blazo; Boev, Ivan; Makreski, Petre (December 31, 2019). "Effect Of Thermal Treatment Of Trepel At Temperature Range 800-1200˚C". Open Chemistry. 17 (1): 1235–1243. doi:10.1515/chem-2019-0132.
^Reka, Arianit; Anovski, Todor; Bogoevski, Slobodan; Pavlovski, Blagoj; Boškovski, Boško (December 29, 2014). "Physical-chemical and mineralogical-petrographic examinations of diatomite from deposit near village of Rožden, Republic of Macedonia". Geologica Macedonica. 28 (2): 121–126.
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Diatomaceousearth (/ˌdaɪ.ətəˈmeɪʃəs/ DY-ə-tə-MAY-shəs), diatomite (/daɪˈætəmaɪt/ dy-AT-ə-myte), celite or kieselgur/kieselguhr is a naturally occurring...
Diatomaceousearth (DE) filtration is a special filtration process that removes particles from liquids as it passes through a layer of fossilized remains...
being replaced by the pressure-fed type filter. Some filters use diatomaceousearth to help filter out contaminants. Commonly referred to as 'D.E.' filters...
bugs had intensive, prolonged contact with diatomaceousearth and no access to a host, diatomaceousearth performed very well. Silica gel, on the other...
A Berkefeld filter is a water filter made of diatomaceousearth (Kieselguhr). It was invented in Germany in 1891, and by 1922 was being marketed in the...
as a cautionary eye irritant and one of several adsorbents such as diatomaceousearth. The product is notorious for its use by Nazi Germany during the Holocaust...
used in studies of water quality. Diatomaceousearth (diatomite) is a collection of diatom shells found in the Earth's crust. They are soft, silica-containing...
replacement to diatomaceousearth filters. Perlite is an excellent filtration aid and is used extensively as an alternative to diatomaceousearth. The popularity...
behaviors can also be controlled. When exposed to sublethal levels of diatomaceousearth (DE), the number of eggs produced decreases, but the rate of cannibalism...
cement, coal, and sawdust, but was unsuccessful. Finally, he tried diatomaceousearth, which is fossilized algae, that he brought from the Elbe River near...
aquatic animals. L layers include coprogenous earth or sedimentary peat (mostly organic), diatomaceousearth (mostly siliceous), and marl (mostly calcareous)...
lime, dolomite, certain types of soil, and diatomaceousearth or Kieselguhr. Of these, diatomaceousearth in particular has seen a revival as a non-toxic...
preliminary study's applicability to other circumstances is unclear. Diatomaceousearth can also be used as a home flea treatment in lieu of acetylcholinesterase...
storage areas, food grade diatomaceousearth can be useful sprinkled in corners or even mixed into bird seed (diatomaceousearth is edible, but inhaling...
dead diatoms are a major constituent of deep ocean sediment, and of diatomaceousearth.[citation needed] A silicate mineral is generally an inorganic compound...
beekeepers against the parasitic varroa mite. Organophosphate miticides Diatomaceousearth will also kill mites by disrupting their cuticles, which dries out...
needed] In most areas, cartridge filters are less expensive than diatomaceousearth filters, but cost more than sand filters.[citation needed] Moreover...
to allow plants to still absorb sunshine and water from the air. Diatomaceousearth, made from fossilized and pulverized silica shells, can be used in...
expensive table salt include calcium carbonate and magnesium carbonate. Diatomaceousearth, mostly consisting of silicon dioxide (SiO2), may also be used as...
developing dynamite in 1867. This was made by mixing nitroglycerin with diatomaceousearth ("Kieselguhr" in German) found in the Krümmel hills. Similar mixtures...
desktop metaphor Dextrose equivalent, the relative sweetness of sugars Diatomaceousearth, a naturally occurring, soft, siliceous sedimentary rock mineral Differential...
called siliceous sinter, deposited around hot springs or geysers; and diatomaceousearth, the accumulations of diatom shells or tests. Common opal often displays...
for a few hours. Catalyst is filtered out. This can be aided with diatomaceousearth. Methanol is distilled followed by addition of water. The mixture...
stishovite, a dense polymorph of silica found in the lower mantle of the Earth and also formed by shock during meteorite impacts. Silicates with alkali...
using his own urine "to brush his teeth and his red gums." By 1924, diatomaceousearth was mined for tooth powder. In modern times, baking soda has been...
A layer of a dry, finely ground, and scratchy substance such as diatomaceousearth can also deter snails. The decollate snail (Rumina decollata) will...
of the aquatic environment. This remnant material is diatomite or "diatomaceousearth", and is used commercially as filters, mineral fillers, mechanical...
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