diatomite
/dai'ætəmait/
Học thuậtThân thiện
Definition
Noun: A soft, light-colored, porous sedimentary rock composed primarily of the fossilized skeletal remains (frustules) of microscopic, single-celled algae called diatoms. It is chemically inert and has a high silica content, which gives it useful absorbent and filtering properties.
Usage
Diatomite is used as a material in various industrial and commercial applications due to its physical characteristics. - It is often processed into a fine powder known as diatomaceous earth. - Its primary use is as a filtering material for liquids such as water, beer, wine, and syrups. - It is also used as a mild abrasive in polishes, a filler in paints and plastics, an absorbent for spills, and in horticulture to improve soil drainage.
Examples
- The brewery uses diatomite to clarify its beer during the filtration process.
- The spill was contained using a layer of absorbent diatomite.
- This pool filter contains a cartridge filled with diatomite for superior water clarity.
- Geologists studied the layers of diatomite to understand the ancient lake environment.
Advanced Usage
- In Scientific Contexts: Diatomite deposits are important paleoenvironmental indicators, as the species of diatoms preserved can reveal past water conditions (e.g., salinity, temperature, nutrient levels).
- In Agriculture: Food-grade diatomaceous earth, derived from diatomite, is sometimes used as a natural insecticide, as its sharp microscopic particles can damage the exoskeletons of insects.
Variants and Related Words
- Diatomaceous Earth (DE): The commercially processed, powdered form of diatomite. This term is often used interchangeably with diatomite in common usage, especially for its applications as a filter aid or insecticide.
- Kieselguhr: A German-derived synonym for diatomite/diatomaceous earth, commonly used in older scientific and industrial texts.
- Tripolite: A historical term for a fine, powdery form of diatomite used as a polishing powder.
Synonyms
- Filter aid (in the context of its primary industrial use)
- Infusorial earth (an older term, as diatoms were once classified under )
- Fossil flour
Related Phrases and Compounds
- Diatomite filter: A filtration system that uses diatomite as the filtering medium.
- Diatomite mining: The process of extracting diatomite from geological deposits.
- Calcined diatomite: Diatomite that has been heat-treated to increase its hardness and filtering efficiency.
Noun
- a light soil consisting of siliceous diatom remains and often used as a filtering material