diatomaceous earth
Noun: A soft, crumbly, porous, and typically light-colored sedimentary deposit composed almost entirely of the fossilized silica shells (frustules) of microscopic single-celled algae called diatoms. It is valued for its low density, high absorptive capacity, and abrasive qualities, leading to its use in various industrial and commercial applications.
Diatomaceous earth is primarily used as a material. It functions as a noun and is typically used in technical, industrial, agricultural, or scientific contexts. * It is often referred to by its abbreviation, DE. * It is also known by other names like diatomite or kieselguhr, which can be considered synonyms in many contexts.
- The swimming pool filter was filled with fresh diatomaceous earth.
- Gardeners sometimes use diatomaceous earth as a natural insecticide.
- The geologist identified the white, chalky layer as a deposit of diatomaceous earth.
- Diatomaceous earth is added to some cat litters for its moisture-absorbing properties.
- In Filtration: Its most common industrial use is as a filter aid (filtering material) for liquids such as beer, wine, syrups, and swimming pool water. The fine, porous structure of the diatom shells traps very small particles.
- As a Mild Abrasive: Found in some metal polishes and toothpastes.
- In Agriculture: Used as a natural pesticide; the sharp microscopic edges of the fossilized shells damage the exoskeletons of insects, causing dehydration.
- As an Absorbent: Used for cleaning up spills, particularly hazardous ones, and in animal bedding.
- Diatomite (n): A synonym for diatomaceous earth, often used in geological and commercial contexts.
- Kieselguhr (n): A German-derived term synonymous with diatomaceous earth, frequently used in older scientific literature.
- Diatom (n): The microscopic algae whose fossilized remains form diatomaceous earth.
- Diatomite
- Kieselguhr
- DE (abbreviation)
- Fossil shell flour
The term "diatomaceous earth" has a single, specific scientific meaning. However, it is marketed for various purposes, leading to contextual distinctions: * Food-Grade Diatomaceous Earth: Purified and processed for use as an anti-caking agent in animal feed or for certain human dietary supplements. It is amorphous silica. * Filter-Grade/Pool-Grade Diatomaceous Earth: Often calcined (heat-treated), which changes some silica to crystalline form. This type is used for filtration and is not safe for human or animal consumption. * Industrial Abrasive Grade: Used in cleaning products and polishes.
-
a light soil consisting of siliceous diatom remains and often used as a filtering material
Khám phá thêm
Các từ liên quan
Từ đồng nghĩa
