What is the use of anionic polyacrylamide in water and wastewater treatment?

The main use of anionic polyacrylamides in water and wastewater treatment is as coagulant aid to bridge the coagulated particles formed when an inorganic coagulants such as alum has been used as the primary coagulant. Fig. 2. Hydrolysis of polyacrylamide

What is polyacrylamide used for?

Polyacrylamide and its co-polymers are used as flocculants or coagulants in industrial wastewater treatment .Homo-polymer is used in this application and can be either nonionic, cationic or anionic depending on the types of wastewater needs to be treated. Also polyacrylamide can be prepared either as linear or as cross-linked.

Which Polyacrylamides are used in the thickening process of colliery effluent treatment?

1. INTRODUCTION Polyacrylamides are used in the "thickening" process of colliery effluent treatment. The wastewater contains mainly clay particles, in suspension, which are flocculated using non-ionic and anionic polyacrylamides, which have molar masses in the range of 7-15 million g/mol.

Does cross-linked polyacrylamide coagulant work better?

Turbidity measurement and the Jar test were used to determine the efficiency of the coagulant. The results showed that cross-linked polyacrylamide worked better than a linear one in coagulating solids particles present in wastewater with improved slurry solids separation efficiency.

What is nonionic polyacrylamide?

Nonionic polyacrylamide is a high polymer with a high molecular weight and a low ion exponent, which has the function of flocculation, dispersal, thickening, bonding, film-forming, relating, and colloidal stability. Its flocculation is hardly influenced by the PH value and the salt, and in the process of acid wastewater

Does nonionic polyacrylamide affect the flocculation process of removing clay?

The presence of nonionic polyacrylamide has slight effect on the flocculation process efficiency of removing clay from industrial wastewater. On the other hand, usin g o f prepared flocculent, it was found that the presence of soap in water in large concentrations has a negative effect on flocculation process.