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ANION EXCHANGE [7 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2004-10-21

English

Subject field(s)
  • Soil Science
DEF

The total amount of exchangeable anions that a soil can adsorb. It is expressed as milliequivalents per 100 g of soil or other adsorbing material such as clay.

French

Domaine(s)
  • Science du sol
DEF

Quantité total d'anions échangeables que le sol peut adsorber. S'exprime en milliéquivalents par 100 g de sol ou d'une autre matière adsorbante, comme l'argile.

Spanish

Campo(s) temático(s)
  • Ciencia del suelo
Save record 1

Record 2 1999-10-09

English

Subject field(s)
  • Chemistry
  • Water Treatment (Water Supply)
  • Soil Science
  • Analytical Chemistry
DEF

The displacement of an anion bound to a site on the surface of a solid by an anion in solution.

DEF

A type of ion exchange in which the immobilized functional groups on the solid resin are positive.

French

Domaine(s)
  • Chimie
  • Traitement des eaux
  • Science du sol
  • Chimie analytique
DEF

Processus d'échange d'anions entre une solution et un échangeur d'anions.

CONT

Dans le cas d'une déminéralisation totale comportant un échange de cations et d'anions on placera en série deux ensembles [...] avec installation d'un post-filtre de sécurité à la sortie de l'échangeur de cation, et d'un bac et d'une pompe de reprise de liquide décationné.

Spanish

Save record 2

Record 3 1999-06-11

English

Subject field(s)
  • Chemical Engineering
  • Electrochemistry
DEF

A resin that holds and swaps only anions. Anion resins contain hydroxyl ions (OH-) to remove negatively-charged, dissolved ionic contaminants such as carbonates, bicarbonates, sulfates, nitrates and silica.

CONT

Other important applications of ion exchange are water softening and ... demineralization ... [in which] all ionic impurities contained in water are removed by exchange for hydrogen and hydroxyl ions during passage of the water successively through cation- and anion-exchange resins in the acid and base form.

French

Domaine(s)
  • Génie chimique
  • Électrochimie
DEF

Résine qui échange uniquement les anions.

CONT

Les échangeurs d'ions [...] [utilisés] dans l'adoucissement des eaux [...] sont maintenant constitués par des résines synthétiques. Ces résines échangeuses de cations et d'anions sont des composés organiques, de structure macro-ionique [...]. C'est ainsi qu'une eau naturelle contenant des impuretés ioniques [...] échange, en passant sur ces résines, les ions qu'elle renferme contre des ions H- ou OH- lesquels se combinent en donnant de l'eau; celle-ci se trouve donc purifiée (désionisée).

Spanish

Campo(s) temático(s)
  • Ingenieria química
  • Electroquímica
DEF

Separa aniones de una solución intercambiándolos por iones oxhidrilo.

CONT

Para que el intercambio iónico resulte económico en el tratamiento avanzado de aguas residuales, convendrá utilizar productos regeneradores y restauradores que eliminen tanto los aniones inorgánicos como el material orgánico de la resina agotada. Los restauradores físicos y químicos, cuya aplicación en la separación de materias orgánicas de resina se ha realizado con éxito, son hidróxido de sodio, ácido clorhídrico, metanol y bentonita.

CONT

El efluente del intercambiador catiónico se hace pasar a continuación, sobre una resina de intercambio aniónico, donde los aniones se sustituyen por iones de hidroxilo.

Save record 3

Record 4 1998-07-03

English

Subject field(s)
  • Chemistry

French

Domaine(s)
  • Chimie

Spanish

Save record 4

Record 5 1996-02-27

English

Subject field(s)
  • Analytical Chemistry
CONT

In 1979, William Bauman at Dow Chemical Company suggested a way to remove the background eluent using a second ion exchange column, and thus permit detection of analyte ions with a highly sensitive conductivity detector (micromhos). This second column is called the suppressor column. For anion analysis, this is a cation exchange column in the acid form; and for cation analysis, it is an anion exchange column in the base form.

French

Domaine(s)
  • Chimie analytique

Spanish

Save record 5

Record 6 1995-05-15

English

Subject field(s)
  • Chemical Engineering
  • Water Treatment (Water Supply)
  • Food Industries
CONT

Anion exchange membranes contain cationic groups which repel cations and are permeable to anions.

French

Domaine(s)
  • Génie chimique
  • Traitement des eaux
  • Industrie de l'alimentation
DEF

Membrane portant des groupes cationiques, perméable aux anions et très peu perméable aux cations.

Spanish

Save record 6

Record 7 1992-07-06

English

Subject field(s)
  • Chemical Engineering
OBS

anion exchange: A type of ion exchange in which the immobilized functional groups on the solid resin are positive.

French

Domaine(s)
  • Génie chimique

Spanish

Save record 7

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