Polyacrylamide is an important water-soluble polymer with valuable properties such as flocculation, thickening, shear resistance, drag reduction and dispersion. These properties vary with the derivative ions.
It is mainly used for the sludge dewatering and decrease the rate of water content of sludge, and it can also be used for papermaking to improve dry & wet strength of paper, to improve dry and wet strength of paper and to increase the reservation of tiny fibers & fillings. Therefore, it is widely used in oil extraction, mineral processing, coal washing, metallurgy, chemical industry, papermaking, textile, sugar making, medicine, environmental protection, building materials, agricultural production and other sectors.
In water treatment, coagulation flocculation involves the addition of compounds that promote the clumping of fines into larger floc so that they can be more easily separated from the water. Coagulation is a chemical process that involves neutralization of charge ... Coagulation is affected by the type of coagulant used, its dose and mass; pH
flocculation are used to separate the suspended solids portion from the water. ... Coagulant chemicals with charges opposite those of the suspended solids are added to the ... These stages are followed by sedimentation, and then filtration