Blog
19
2021
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02
How to distinguish anionic polyacrylamide and cationic polyacrylamide?
According to the ionic characteristics, polyacrylamide can be divided into four types: non-ionic polyacrylamide (NPAM), ionic polyacrylamide (ACPAM), anionic polyacrylamide (APAM), cationic polyacrylamide (CPAM). For different application areas, the type of polyacrylamide used will be different. If used improperly, the water treatment effect is not very obvious. Therefore, when using polyacrylamide to treat water, it is necessary to know whether it is anionic polyacrylamide or cationic polyacrylamide, otherwise the use of the wrong PAM not only does not have the effect of purifying water, but also has an adverse effect.
However, different types of polyacrylamide products have the same appearance and are difficult to distinguish. The following summarizes some methods of how to distinguish its anionic polyacrylamide and cationic polyacrylamide, I hope it will be helpful to you.
1. Starting from the water solubility, the time for different types of polyacrylamide to be completely dissolved in water is different. The dissolution time of anionic polyacrylamide is within 30 minutes, and the dissolution time of cationic polyacrylamide is within 60 minutes. Therefore, the type of substance can be distinguished from water solubility.
2. To distinguish the PH value and PH value of polyacrylamide, it is easy to distinguish the product model, because different types of products have different pH values, but this method of distinguishing requires professional instruments to measure, of course, it is also very different from the manufacturer's production process. There is a lot of variation, and usually this approach requires someone with expertise to distinguish it.
3. Judging the results of sewage treatment. Since polyacrylamide is mainly used for sewage treatment, it is usually suitable for sewage with high concentration, acidic and alkaline pH when selecting anions. In any case, the cation is suitable for suspension in an inorganic mixed state, and after sewage treatment, the two can be correctly distinguished.
You can distinguish polyacrylamide is anionic polyacrylamide or cationic polyacrylamide according to the above several small methods. Of course, it is not enough to distinguish between anions and cations, because there are many types of polyacrylamides and they are used for sewage treatment. When using polyacrylamide, due to the different water quality of sewage, the type of polyacrylamide used is also different. More polyacrylamide classification use details, welcome to contact us.
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