cited by: cationic anionic nonionic poly acrylamide pam chemical

cited by: cationic anionic nonionic poly acrylamide pam chemical
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  • Which cationic polyacrylamide has a charge density of 40%?
  • Three commercial cationic (PAM +S,τ40 ), nonionic (PAM °S) and anionic (PAM −S,τ40) polyacrylamides (PAMs) with a medium chain length produced by the SNF group (Andrézieux, France) were used ( Table 1 ). PAM +S,τ40 and PAM −S,τ40 have a charge density of 40%.
  • What is ionic polyacrylamide (PAM)?
  • These substances, also called soil flocculants, are macromolecular compounds which contribute to the reinforcement of soil structure as a result of its adsorption on the mineral surface. The soil conditioners commonly used in agriculture is ionic polyacrylamide (PAM)—both anionic and cationic.
  • What causes nonionic polyacrylamide adsorption?
  • Nonionic polyacrylamide adsorption on clay minerals is mainly caused by van der Waals forces , whereas cationic or anionic forms adsorb and bind soil particles through electrostatic forces or bridge formation between PAM charged moieties and solid surface group [1, 80].
  • What is anionic polyacrylamide?
  • Anionic polyacrylamide is polymer with a large number of negatively charged moieties in the long chains of the PAM macromolecules. It can be obtained by partial hydrolysis of polyacrylamide neutral amide groups, which is shown in (3). This process occurs under moderate temperature by adding sodium hydroxide to the PAM solution [4, 6].