How does the ion exchange resin work?
How does the ion exchange resin work?
How does ion exchange resin work? Put simply, ion exchange is a reversible interchange of charged particles—or ions—with those of like charge. This occurs when ions present on an insoluble IX resin matrix effectively swap places with ions of a similar charge that are present in a surrounding solution.
What is the theory behind ion exchange chromatography?
Ion exchange (IEX) chromatography is a technique that is commonly used in biomolecule purification. It involves the separation of molecules on the basis of their charge. In anion exchange the stationary phase is positively charged whilst in cation exchange it is negatively charged.
What are the 4 types of ion exchangers?
Ion exchangers are either (i) cation exchangers, which exchange positively charged ions—cations, or (ii) anion exchangers which exchange negatively charged ions—anions….
- Strong-acid cation resins.
- Weak-acid cation resins.
- Strong-base anion resins.
- Weak-base anion resins.
What is ion exchange theory?
Ion exchange is a water treatment method where one or more undesirable ionic contaminants are removed from water by exchange with another non-objectionable, or less objectionable ionic substance.
How do you activate ion exchange resin?
The resin can be recharged by washing it with a solution containing a high concentration of sodium ions (e.g. it has large amounts of common salt (NaCl) dissolved in it). The calcium and magnesium ions migrate from the resin, being replaced by sodium ions from the solution until a new equilibrium is reached.
How does ion exchange occur?
The exchange process occurs between a solid (resin or a zeolite) and a liquid (water). In the exchange of cations during water treatment, positively charged ions that come into contact with the ion exchange resin are exchanged with positively charged ions available on the resin surface, usually sodium.
Why is ion exchange chromatography used?
Ion exchange chromatography is commonly used to separate charged biological molecules such as proteins, peptides, amino acids, or nucleotides. The amino acids that make up proteins are zwitterionic compounds that contain both positively and negatively charged chemical groups.
How many types exchangers are used in ion exchange process?
Cation exchangers can be divided into two groups : highly acid cation exchangers; slightly acid cation exchangers.
How many types of ion exchange chromatography are there?
two types
The two types of ion chromatography are anion-exchange and cation-exchange. Cation-exchange chromatography is used when the molecule of interest is positively charged.
What is the basic principle in ion exchange?
Ion exchange is the process through which ions in a solution are transformed into a solid which release ions of a different type but of the same polarity. This means that the ions in solutions are replaced by different ions originally present in the solid.
What are ion exchangers give example?
Ion exchangers are natural substances—for example, certain clays—or deliberately synthesized resins containing positive ions (cation exchangers) or negative ions (anion exchangers) that exchange with those ions in solution having a greater affinity for the exchanger.
Which is the best description of an ion exchange resin?
] An ion-exchange resin or ion-exchange polymer is a resin or polymer that acts as a medium for ion exchange. It is an insoluble matrix (or support structure) normally in the form of small (0.25–0.5 mm radius) microbeads, usually white or yellowish, fabricated from an organic polymer substrate.
How does the net neutral charge of ion exchange resin work?
The Na + are held to the fixed SO 3– anions by electrostatic attraction, resulting in a net neutral charge in the resin. During an active IX cycle, a stream containing hardness ions (Ca 2+ or Mg 2+) is added to the cation exchange resin.
How does ion exchange work in a solution?
For ion exchange to be efficient there must be a difference in affinity between the ion in the resin and the ion or ions you want to remove from solution. The resin must have a higher affinity for the ion in solution compared to the ion in the resin.
How does crosslinking affect the ion exchange of resin?
Crosslinking decreases ion-exchange capacity of the resin and prolongs the time needed to accomplish the ion-exchange processes but improves the robustness of the resin. Particle size also influences the resin parameters; smaller particles have larger outer surface, but cause larger head loss in the column processes.