How To Handle The Yellowing Of Mixed Bed Resin

Mixed bed resin is an important water treatment material that can be used to remove various ions and other harmful substances from water. If the mixed bed resin turns yellow, it may be caused by pollutants or chemical reactions in the resin, which will affect its efficiency and require corresponding treatment.

The reasons for the yellowing of mixed bed resin

There may be various reasons for the yellowing of mixed bed resin, and the following are some possible reasons:

1. Poor decolorization effect: Mixed bed resin is used to remove chromatic substances from water. If the decolorization effect of the resin is not good, it may cause the resin to turn yellow. It is possible that the resin has become supersaturated or has been used for too long, making it unable to effectively remove color substances.

2. Chemical reactions: Some organic compounds, oxidants, reducing agents, or acidic or alkaline substances may react with resins, causing color changes.

3. Impact of hard water: High concentrations of calcium and magnesium ions in hard water may react with anion exchangers in the resin, forming sediment or color changes.

4. Aging and wear: With the increase of usage time, the resin may age and wear, and the resin may lose efficiency, leading to yellowing.

Treatment method for yellowing of mixed bed resin

1. Cleaning resin: First, attempt to clean the resin with an appropriate cleaning agent to remove pollutants. Choose appropriate cleaning agents based on the nature of the pollutants. You can try using acidic or alkaline cleaning agents, or use products specifically designed for resin cleaning. Please be sure to follow the instructions for using the cleaning agent and clean in a safe environment.

2. Oxidation treatment: If the resin still turns yellow after cleaning, an oxidant can be considered for treatment. A commonly used oxidant is hydrogen peroxide (hydrogen peroxide), which can help remove pollutants from the surface of the resin, such as using a hydrogen peroxide solution to come into contact with the resin for a period of time, and then thoroughly rinsing the resin.

3. Resin replacement: If the above method cannot restore the color of the mixed bed resin, it may be necessary to consider replacing the resin bed layer. The lifespan of the resin bed layer is limited, and it will gradually fail after a period of use, making it unable to effectively remove ions. When replacing resin, make sure to choose the appropriate type and specification, and replace it in the correct way.

Notes on post yellowing treatment

When yellowing the mixed bed resin, appropriate treatment methods should be selected, and appropriate backwashing or bleaching methods should be selected based on the material and degree of the resin. At the same time, it is necessary to follow operating procedures and take safe and reliable measures to prevent harm to human health and the environment. Finally, carry out follow-up monitoring and maintenance work to ensure the continuous efficiency and service life of the resin.