WordNet

pour out; "the sommelier decanted the wines" (同)pour, pour_out
the act of gently pouring off a clear liquor (as from its original bottle) without disturbing the lees

PrepTutorEJDIC

(中の沈殿物を動かさないように他のびんへ)〈液体,特に酒〉'を'静かにつぐ
食卓用栓つきガラスびん(ぶどう酒を入れることが多い)

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/11/14 09:28:18」(JST)

wiki en

[Wiki en表示]

Upper phase
Lower phase

An example of decanter.

Decantation is a process for the separation of mixtures, by removing a layer of liquid, generally one from which a precipitate has settled. The purpose may be either to produce a clean decant, or to remove undesired liquid from the precipitate (or other layers). If the aim is to produce a clean solution, a small amount of solution must generally be left in the container, and care must be taken to prevent any precipitate from flowing with the solution out of the container.

Preliminary processes

A mixture of an insoluble solid in liquid is allowed to stand. The solid is insoluble and settles at the bottom if kept undisturbed for some time. This process is called decantation. A centrifuge may be useful in decanting a solution. The centrifuge causes the precipitate to be forced to the bottom of the container; if the force is high enough, the precipitate may form a compact solid. Then the liquid can be more easily poured away, as the precipitate will tend to remain in its compressed form. Similarly a mixture of two immiscible liquids can also be separated by decantation. For example, the oil and water extracted from fish may be decanted to obtain the oil. A mixture of kerosene and water can also be separated through decantation.

Examples

It is frequently used to purify a liquid by separating it from a suspension of insoluble particles (e.g. in red wine, where the wine is decanted from the potassium bitartrate crystals). To obtain a sample of clear water from muddy water, muddy water is left in a container until the mud settles, and then the clear water is poured into another container.

Another example of decantation is the regeneration of used chiral stationary phase (CSP). The CSP to be decanted is gently mixed in a container with a compatible solvent to form a suspension. The suspension is allowed to rest for a period of time, after which the supernatant is carefully poured off. The supernatant contains the undesirable constituents of the former suspension, while the leftover sediment in the container is clean, reusable CSP. Decantation should be done directly after sedimentation. This process is also used in erected pure iron from iron ore.

References

This chemistry-related article is a stub. You can help Wikipedia by expanding it.

English Journal

Impact of uranium mines closure and abandonment on groundwater quality.

Rapantova N, Licbinska M, Babka O, Grmela A, Pospisil P.SourceInstitute of Clean Technologies for Mining and Utilization of Raw Materials for Energy Use, VSB-Technical University of Ostrava, 17, Listopadu 15, 708 33, Ostrava, Czech Republic, nada.rapantova@vsb.cz.
Environmental science and pollution research international.Environ Sci Pollut Res Int.2013 Nov;20(11):7590-602. doi: 10.1007/s11356-012-1340-z. Epub 2012 Dec 13.
The aim of the study is to assess the evolving mine water quality of closed uranium mines (abandoned between 1958 and 1992) in the Czech Republic. This paper focuses on the changes in mine water quality over time and spatial variability. In 2010, systematic monitoring of mine water quality was perfo
PMID 23238594

Chronic stress exposure may affect the brain's response to high calorie food cues and predispose to obesogenic eating habits.

Tryon MS, Carter CS, Decant R, Laugero KD.SourceDepartment of Nutrition, University of California, Davis, CA 95616, USA.
Physiology & behavior.Physiol Behav.2013 Aug 15;120:233-42. doi: 10.1016/j.physbeh.2013.08.010. Epub 2013 Aug 16.
Exaggerated reactivity to food cues involving calorically-dense foods may significantly contribute to food consumption beyond caloric need. Chronic stress, which can induce palatable "comfort" food consumption, may trigger or reinforce neural pathways leading to stronger reactions to highly rewardin
PMID 23954410

Continuous fill intermittent decant type sequencing batch reactor application to upgrade the UASB treated sewage.

Khan AA, Gaur RZ, Diamantis V, Lew B, Mehrotra I, Kazmi AA.SourceDepartment of Civil Engineering, IIT Roorkee, Roorkee 246447, India. dee.abid@gmail.com
Bioprocess and biosystems engineering.Bioprocess Biosyst Eng.2013 May;36(5):627-34. doi: 10.1007/s00449-012-0831-0. Epub 2012 Nov 2.
The performance of continuous flow intermittent decant type sequencing batch (CFID) reactor treating the effluent of an UASB reactor treating domestic wastewater and operated at 8 h hydraulic retention time (HRT) was investigated. The CFID was operated at three different HRTs (22, 8 and 6 h) and t
PMID 23117522

Japanese Journal

記念講演ディーセント・ワークの実践に向けて--「人本主義」という経営理念 (特集 ILO創立90周年・日本ILO協会創立60周年)

伊丹敬之
世界の労働 59(8), 58-63, 2009-08
NAID 40016835087

デカントオイルからのメソフェーズピッチおよび高性能炭素繊維の調製

加藤攻,上村誠一,光来要三,持田勲
Journal of the Japan Petroleum Institute 47(2), 100-106, 2004-03-01
デカントオイル（DO）からの紡糸用メソフェーズピッチの調製ならびに調製したピッチからの高性能炭素繊維の製造方法について調べた。DOから直接一段でメソフェーズピッチを調製すると収率が4.6％と極めて小さかったので，加圧下での熱処理と窒素流通下での加熱を組み合わせた調製方法を採用した。これにより，収率が19.0％に上昇した。芳香族分を多く含み，密度が1.05 ml/g以上であるDOが原料として好ま …
NAID 130000066033