What is cationic polyacrylamide (CPAM)?

Cationic polyacrylamide (CPAM) is a water-soluble linear polyelectrolyte with high molecular weight and positive charge density. Because of its low cost, high efficiency, and simple operation, CPAM is widely used as a chemical conditioner for flocculation pretreatment of sludge before mechanical dewatering (Sun et al. 2018; Zhou et al. 2014 ).

What is cationic polyacrylamide?

Cationic Polyacrylamide is white power or granule, the degree of ion is from 5% to 80%, soluble, good water solubility, can be dissolved in water at any percentage and be undissolved in organic solvents. CPAM shows characteristics of high polymer electrolyte, suitable for wastewater treatment with a negative charge and rich organic matter.

What factors affect the flocculation effect of cationic polyacrylamide (CPAM)?

Cationic polyacrylamide (CPAM) is a commonly used flocculant for water treatment. Factors that affect the flocculation effect and can be controlled manually include the type and dosage of CPAM, wastewater pH, stirring time and settling time, and their reasonable setting is critical to the flocculation effect of CPAM.

Does cationic polyacrylamide enhance algal harvest?

[Google Scholar] [CrossRef] Park, J.B.K.; Meerman, C.; Craggs, R. Continuous low dosing of cationic polyacrylamide (PAM) to enhance algal harvest from a hectare-scale wastewater treatment high rate algal pond. N. Z. J. Bot. 2019, 57, 112–124.

Are intrinsic viscosity and cationic degree correlated with CPAM flocculation efficiency?

The intrinsic viscosity, cationic degree and settling time were positively correlated with the flocculation efficiency of CPAM, and their optimums were those obtained by the single factor test.

Can UV-initiated polymerization improve CPAM flocculation efficiency?

Huaili Zheng et al. successfully synthesized CPAM by UV-initiated template polymerization and found the cationic microblock structure in its molecular chain . However, studies on how to improve the flocculation efficiency of CPAM prepared with UV-initiated polymerization have rarely been reported.