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Encyclopedia > Filter (chemistry)

In chemistry and common usage, a filter is a device (usually a membrane or layer) that is designed to block certain objects or substances while letting others through. Filters are often used to remove harmful substances from air or water, for example to remove air pollution, to make water drinkable, to prepare coffee. In domestic food and drink preparation where bulk solids are removed from liquids, this is often called a strainer. Chemistry (derived from alchemy) is the science of matter at or near the atomic scale. ... Look up air in Wiktionary, the free dictionary. ... Water (from the Old English waeter; c. ... This power plant in New Mexico releases sulfur dioxide and particulate matter into the air. ... Coffee in beverage form Coffee is a beverage, served hot or with ice, prepared from the roasted seeds of the coffee plant. ...

Filtrate is the liquid produced after filtering a suspension of a solid in a liquid. Suspension may refer to: suspension (chemistry) suspension bridge suspension (music) suspension (vehicle) (system of shock absorbers and supports that connect a vehicle to its wheels) suspension (civil engineering) (system that connects a structure to its foundation, for example in earthquake protection) suspension (topology) suspension (body modification) suspension bondage suspension (figure... In jewelry, a solid gold piece is the alternative to gold-filled or gold-plated jewelry. ... A liquid will assume the shape of its container. ...

See also

Filters for various substances:

Filters for specific applications: A water filter is a device which removes impurities from water by means of a fine physical barrier and/or chemical processes. ... Air filter in an Opel Astra car, top side=clean side Air filter in an Opel Astra car, bottom side=dust side An air filter is a device which removes contaminants, often solid particles such as dust, pollen, mold, and bacteria from air. ... Many items requiring lubrication by petroleum products need this lubricant to be highly clean. ...

Filters by various methods: A pneumatic filter is a device which removes contaminants from the compressed air stream. ... Categories: Stub ... A half face particulate mask is generally worn to protect the wearer from dust and paint fumes A filter mask or particulate mask is a protective mask which usually covers the mouth and nose only. ...

Related devices and concepts: A disk filter is a type of water filter similar to a screen filter, except that the filter cartridge is made of a number of disks stacked on top of each other like a pile of poker chips. ... Filter paper is any of various grades of coarse unfinished paper which can be used to separate solids from a liquid in which they are suspended. ... A media filter is a type of filter utilizing a bed of sand, crushed granite or other material to filter water for drinking, swimming pools, aquaculture, irrigation, and other applications. ... A sand separator or hydrocyclone is a device which utilizes centrifugal force to separate sand or other heavy particles out of water. ... A screen filter is a type of filter utilizing a rigid or flexible screen to separate sand and other fine particles out of water for irrigation or other applications. ... Slow sand filter beds are used in water purification for treating raw water to produce a potable product. ...

  Results from FactBites:
filter - Search Results - MSN Encarta (238 words)
Filters added to the front of a camera lens change the quantity or quality of the light that reaches the film.
The term filter may refer to: * In chemistry, engineering, or household usage, a device to separate mixtures.
Filter is an industrial rock group formed in 1993 by Richard Patrick (former live guitarist for Nine Inch Nails) and guitarist/programmer Brian Liesegang.
Filter - Wikipedia, the free encyclopedia (179 words)
In chemistry, engineering, or household usage, a device to separate mixtures.
Filter (band), an industrial rock band of the 1990s
Filter feeder, an animal that strains food particles from water
  More results at FactBites »



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