SHATAT, R.; NIAZI, S.; AL BATATI, F. Synthetic Polyelectrolytes Based on Polyacrylamide: Non-ionic, Anionic and Cationic Polyacrylamides and Their Applications in Water and Wastewater Treatment: Literature Review. Chemical Science International Journal, v. 25, n. 4, p. 1-8, 28 jan. 2019.