PAM structural differences
Cationic polyacrylamide (CPAM): It is a linear polymer compound. Because it has a variety of active groups, it can form hydrogen bonds with many substances through affinity and adsorption. Mainly flocculates negatively charged colloids.
Anionic polyacrylamide (APAM): It is a water-soluble high molecular polymer. It is mainly used for flocculation and sedimentation, sedimentation and clarification treatment of various industrial wastewaters, such as steel plant wastewater, electroplating plant wastewater, metallurgical wastewater, coal washing wastewater and other sewage treatment, Sludge dehydration, etc. It can also be used for drinking water clarification and purification treatment. Because its molecular chain contains a certain number of polar groups, it can accelerate particles in suspension by adsorbing solid particles suspended in water, forming bridges between particles, or agglomerating particles to form large flocs through charge neutralization. The sedimentation has a very obvious effect of accelerating solution clarification and promoting filtration.
Nonionic polyacrylamide (NPAM): It is a high molecular polymer or polyelectrolyte. Its molecular chain contains a certain amount of polar genes that can adsorb solid particles suspended in water, forming bridges between particles to form large flocs. It accelerates the sedimentation of particles in suspension, has a very obvious effect of accelerating the clarification of the solution and promoting filtration. Since the molecular chain contains amide groups or ionic genes, its distinctive feature is that it is highly hydrophilic and can be dissolved in water at various proportions. The polyacrylamide aqueous solution has good tolerance to electrolytes, such as amine chloride, sodium sulfate, etc. Not sensitive and compatible with surfactants.
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