water treatment chemical flocculant nonionic anionic cationic

water treatment chemical flocculant nonionic anionic cationic
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  • Which cationic polymer is used in direct flocculation?
  • In direct flocculation, medium charge density with high molecular weight cationic polymers is normally used. It has dual functions: (1) neutralise the negative charges of the colloidal particles and (2) bridge the aggregated destabilised particles together to form flocs ( Chong, 2012 ).
  • What are cationic flocculants used for?
  • Cationic flocculants are normally used to flocculate negatively charged particles, and are used in wastewater and sludge treatment, paper production, oily water clarification, textile industry, paint manufacturing, dairy processing, and biotechnology. Compared to nonionic monomers, cationic monomers are less accessible and stable.
  • Do cationic and anionic Pam improve particle flocculation characteristics?
  • The results revealed that when the ionic strength and MW were low, anionic flocculation characteristics improved, but cationic flocculants performed better when the cationic strength and MW were high. The success of anionic and cationic PAM in flocculation can be related to particle charges that allow for particle flocculation with polymers.
  • Which flocculants are used in wastewater treatment?
  • Summary of chitosan, cellulose, and alginate-based flocculants used in the treatment of wastewater TOC, total organic carbon; CNC, cellulose nanocrystal. Stimuli-responsive polymers are a class of macromolecules that undergo conformational changes and switch their solubility when the right stimulus is applied.