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Amphoteric flocculant has the characteristics of both anionic and cationic groups.
In the molecule of amphoteric flocculant, the cationic groups contained are mainly amino (—NH 3 + ), imino (—NH 2 + —), and quaternary ammonium groups (NR 4 + ), and the anionic groups contained are—COOM (where M It is mainly hydrogen ion or metal ion)