(from the article `clay mineral`) Depending on deficiency in the positive or negative charge balance (locally or overall) of mineral structures, clay minerals are able to adsorb ... ...1) exchange positive ions, or cations, and the process is called cation exchange. Those having fixed positive charges correspondingly exchange ... Sim...
Found on
http://www.britannica.com/eb/a-z/a/77
The process by which an anion in a mobile (liquid) phase exchanges with another anion previously bound to a solid, positively charged phase, the latter being an anion exchanger. It takes place when Cl- is exchanged for OH- in desalting. The reaction is Cl- (in solution) + (OH- on anion exchanger+) → (Cl- on anion exchanger) + OH- (in solut...
Found on
http://www.encyclo.co.uk/local/20973
Type: Term Pronunciation: an′ī-on eks-chānj′ Definitions: 1. The process by which an anion in a mobile (liquid) phase exchanges with another anion previously bound to a solid, nonmobile, positively charged phase, the latter being an anion exchanger. For example, the process takes place when Cl− is exchanged for OH−...
Found on
http://www.medilexicon.com/medicaldictionary.php?t=4316
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