What is cationic polyacrylamide (CPAM)?

Cationic polyacrylamides (CPAMs) are widely utilized due to their excellent performance in flocculation and sludge dewatering . Numerous studies have been conducted on CPAM synthesis technologies, including grafting, free radical polymerization, and polymer modification .

How cationic polyacrylamides are used in sludge dewatering?

Chemical conditioning by the cationic polyacrylamides (CPAMs) has been extensively used in the process of sludge dewatering owing to their advantages such as less dosage, higher efficiency, facile operation and affordable price , .

How does cation monomer DMC affect CPAM reactivity?

The content of the cation monomer DMC directly influenced the molecular weight and cationic degree of the resulting product. The molecular weight of the CPAM decreased with an increase in cationic degree, attributed to the lower reactivity of the cation monomer compared to the acrylamide monomer.

How CPAM emulsion works in wastewater treatment process?

The flocculation in the wastewater treatment process utilizing a CPAM emulsion is illustrated in Figure 9. The CPAM cationic flocculant operates through a charge neutralization mechanism, whereby the negative charges present in the colloidal particles are neutralized.

What happens when cationic monomers are added to cpamd?

When the anionic template sodium polyacrylate (NaPAA) is added to the reaction system of CPAMD, cationic monomer DAC can be adsorbed to NaPAA by electrostatic force, and then, cationic monomers will be continuously arranged along the molecular chain of the template, thereby forming precursors with cationic microblock structure (Guan et al. 2014).

Does microblocked polyacrylamide improve municipal sludge dewaterability?

An, Y. Enhanced Municipal Sludge Dewaterability Using an Amphiphilic Microblocked Cationic Polyacrylamide Synthesized through Ultrasonic-Initiation: Copolymerization and Flocculation Mechanisms.