Overview
![](/assets/images/picto-drapeau-france-3a76576a5d60a512053b4612ab58dae5.png)
ABSTRACT
Ion exchange resins are used in filter vessels. Once exhausted, they must be regenerated. This article reviews various ion exchange column types, their combination, and how they are used and regenerated, with several examples of application in water treatment.
Read this article from a comprehensive knowledge base, updated and supplemented with articles reviewed by scientific committees.
Read the articleAUTHOR
-
François de DARDEL: Chemical engineer, Swiss Federal Institute of Technology Zurich - Former Technical Director at Rohm and Haas in Paris, France
INTRODUCTION
First of all, let's recall the definition of the unitary ion exchange process. Ion exchange is a chemical process in which ions of a certain charge present in a solution are removed from that solution by adsorption onto a generally solid material (rarely an immiscible liquid), to be replaced by an equivalent quantity of other ions of the same charge from the solid material (the ion exchanger).
In the light of the general considerations set out in the article "Ion exchange. Basic principles"
We'll then look at the different types of columns used in water treatment and other fields, with some construction details: columns allowing periodic lifting of resins, or compact beds that improve regeneration efficiency and the quality of the treated solution (water or other liquid); the most common water treatment linkages; mixed-bed finishing columns, etc.
A complete calculation of industrial water demineralization is provided, with details of the useful capacities of resins and regenerants.
Special water treatment processes, such as organic matter or nitrate removal, brackish water or condensate treatment, are covered in a third article
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
![](/assets/images/logo-eti-286623ed91fa802ce039246e516e5852.png)
The Ultimate Scientific and Technical Reference
KEYWORDS
resins | filter vessels | water treatment | chemical industries | food industry | filtration | regeneration | purification
This article is included in
Water technologies
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Ion exchange