polyacrylamide-induced coagulation process removing suspended

polyacrylamide-induced coagulation process removing suspended
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  • How are polyacrylamide and aetac-co-Aam synthesized?
  • Polyacrylamide (sample A) and AETAC- co -AAm (samples B, C, D) with different monomer compositions and molecular weights were synthesized by changing the concentration of V-50 from 0.01 to 1.06 mol% in the monomer mixture. The reactions were stopped by cooling, and the polymers were isolated by repeated precipitation in acetone.
  • Why are acrylamide-based polymer flocculants used in sludge dewatering?
  • In recent years, more than two kinds of acrylamide-based polymer flocculants have been used because sludge dewatering has become difficult owing to increasing organic matter content in wastewater [ 11, 12, 13 ]. The chemical structure of AETAC- co -AAm
  • Does polyacrylamide have a flexible chain structure?
  • Polyacrylamide (sample A) is uncharged and has a flexible chain structure, whereas AETAC- co -AAm (sample D) is a polyelectrolyte, which we assume has a relatively expanded chain structure in D 2 O owing to electrostatic repulsion between the charged AETAC units.
  • How was radical polymerization performed?
  • Radical polymerization was performed in water at 40 °C for 15 h with V-50 as the initiator. Polyacrylamide (sample A) and AETAC- co -AAm (samples B, C, D) with different monomer compositions and molecular weights were synthesized by changing the concentration of V-50 from 0.01 to 1.06 mol% in the monomer mixture.