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 .

Can cationic polyacrylamide be used in water treatment and sludge dewatering?

To read the full-text of this research, you can request a copy directly from the authors. Cationic polyacrylamide (CPAM) were used extensively in water treatment, enhanced oil recovery and sludge dewatering. The review summarized the synthesis methods research progress of cationic flocculants.

How is CPAM prepared?

CPAM is mainly prepared by polymerization of AM and cationic monomer. Acryloxy trimethylammonium chloride (DAC) is one of the more commonly used cationic monomers. The flocculant copolymerized of AM and DAC has been widely synthesized and used in sludge dewatering and conditioning.

Can polyaluminium chloride remove organic matter from waste water?

Due to their cationic nature, polyaluminium chloride (PAC) and high molecular weight cationic polyacrylamide (CPAM) have not only been explored as retention aids in papermaking operations but also can be successfully used to remove organic matters from waste water (Jiang and Zhu 2014; Brovkina et al. 2015).

Are cationic copolymers used in sludge dewatering?

Four groups of synthesis technologies of cationic copolymers were reviewed, including aqueous solution polymerization, dispersion polymerization, inverse emulsion polymerization and photo initiated polymerization. Furthermore, the paper reviewed that the application of cationic flocculants in sludge dewatering treatment.

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).