Can polyacrylamide flocculation be used for alum coagulation?

There is a growing interest in the use of ultrafiltration (UF) for the treatment of micro-polluted surface waters for drinking water supplies. Effective pretreatment is required to mitigate membrane fouling and in this paper we have evaluated the application of polyacrylamide (PAM) flocculation with alum coagulation.

What is a polymer flocculant?

Among the synthetic polymer flocculants, the most important is water-soluble polyacrylamide (PAM)—a non-ionic, amorphous polymer which can be modified to ionic form in the copolymerization process [8, 9, 10]. The acrylamide monomer can be used for grafting or crosslinking of other type of polymers.

What are water soluble polymer flocculants?

Abstract Water soluble polymer flocculants are important constituents of solid–liquid separation units for the treatment of a variety of process-affected effluents. The systematic development of a …

Does polyacrylamide structure affect flocculation of bentonite clay?

Shaikh and coworkers studied the effect of polyacrylamide structure on the flocculation of bentonite clay. 208 Using turbidity as a powerful measure, they compared flocculations using cationic, anionic, and amphoteric polyacrylamides of varying molecular weights.

Why are polymer flocculants used in water purification?

Therefore, in modern water purification technologies, polymer flocculants are increasingly used. Polymer flocculants cause the formation of large, coherent aggregates (so-called flocs) that settle in the solution. Synthetic polymers are highly effective flocculants at low dosages but have poor shear stability.

What is the flocculation ability of Pam-hade compared with poly acrylamide-N-acryloyl-?

The flocculation ability of the novel PAM-HADE was compared with that of poly (acrylamide- N -acryloyl-1,2-diaminoethane hydrochloride) (PAM-LADE) as its linear alternative in 1 wt% kaolinite suspension.