Deionization Resin
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A deionization resin is the name given to the material making up the ion exchange resin beds in a deionization process. As Tap Water is passed across the deionization resin beds, trace metals are removed from the water by the process of neutralising the positive and negative ions and the resultant liquid is known as Deionized Water or Demineralized Water, usually spelt with a ‘z’. However, Deionize and Demineralize are sometimes spelt with a ‘s’ to produce Deionise, Deionised, Deionisation, Demineralise, Demineralised and Demineralisation. Other synonyms include DI Water, Demin Water and DIW.
There are two general types of deionization resin – those that exchange positive ions and those that exchange negative ions. The ones that exchange positive ions are known as ‘cationic’ exchange resins whilst the ones that exchange negative ions are known as ‘anionic’ exchange resins. A cationic exchange resin is one that exchanges positive ions whilst an anionic exchange resin is one that exchanges negative ions.
On a physical level, ion exchange resins are formed in the shape of small resin beads of approximately 0.5 mm diameter. Wet deionization resin looks a little like damp, transparent sand and is insoluble in water, acids and bases. Exchange capacity is the amount of impurity that a certain amount of resin is able to remove. This is measures in terms of moles/ml, equivalents/ml or moles/gm.
Deionized Water has a wide range of uses both in industry, the home and in the laboratory. Industrial uses include those in the automotive industry, leather treatment and ceramics, whilst in the laboratory Deionized Water is used when water quality is critical to the analytical process for which it is used.
Before you buy Deionized Water, it might be worth looking for a supplier with a recognised Quality Accreditation. This will give you peace of mind that the Deionized Water you buy will be produced by a reputable company with experience in the field of high water purity. Such a company might be a specialist water supplier or a chemical company which specialises in supplying high purity water. Accreditations to look out for include ISO 9001:2000 Quality Management System and ISO 14000 Environmental Standard. Both of these accreditations will give some guarantee that the product being purchased meets the Quality Standard and is often seen as an indication of a reputable supplier.
Deionized Water is usually available in a range of pack sizes from 1 litre and 5 litre up to 25 litre and 1,000 litre Intermediate Bulk Containers (IBC’s) for those who have a high usage of Deionized Water. Generous discounts can often be given for large orders of Deionized Water in bulk. Any unused Deionized Water can safely and legally be poured down the drain as it will have no adverse reaction on aquatic organisms and will not change the natural pH balance of water.
For further information on Deionized Water including the various uses of Deionized Water such as Deionized Water car applications and Deionized Water battery applications, please refer to the relevant pages of this website.
http://www.deionized-water.co.uk/deionization-resin | Saved Friday, November 18th, 2011 - 4:29 AM