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.

Is cationic polyacrylamide emulsion a flocculant for paper mill wastewater treatment?

" Cationic polyacrylamide emulsion with ultra-high concentration as a flocculant for paper mill wastewater treatment ," BioRes. 15 (2), 3173-3189. Cationic polyacrylamide emulsions prepared with ultra-high concentration (CPAME-uhc) have the advantages of fast dissolution, convenient operation, and low transportation cost.

What is cationic polyacrylamide (CPAM)?

Cationic polyacrylamide (CPAM) is a linear macromolecule compound. Because of its various active groups, it can adsorb many substances to form hydrogen bonds (Ma et al. 2017; Li et al. 2018).

What are CPAM flocculation methods?

CPAM contains long molecular chains and many cationic units, so its main flocculation methods are adsorption bridging and charge neutralization .

Does CPAM affect the flocculation effect?

The single-factor test results showed that the flocculation effect was better when the intrinsic viscosity was larger or the cationic degree of CPAM was higher; the CPAM dosage, wastewater pH and stirring time had significant impacts on the flocculation effect of CPAM and existed optimums.

What is the retention rate of cationic polyacrylamide?

To use the cationic PAM as the retention agent, the retention rate is 98%. The tiny fiber and the lignin in the pulp has better combination with the cationic polyacrylanmide than the anionic polyacrylamide, the cationic polyacrylamide has strong effect on the retention efforts.