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Polyelectrolyte Characteristics and Flocculation
Author(s) -
Leu RongJin,
Ghosh iganka M.
Publication year - 1988
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1988.tb03021.x
Subject(s) - polyelectrolyte , flocculation , mixing (physics) , chemical engineering , polymer , materials science , charge density , cationic polymerization , chemistry , chemical physics , polymer chemistry , composite material , physics , quantum mechanics , engineering
The relationships among the characteristics of cationic polyelectrolytes, mixing conditions, and flocculated particle size distribution were studied in an attempt to develop a rational basis for selecting polyelectrolytes. Charge density was found to be the predominant factor in selecting an optimum dosage of polyelectrolyte for flocculating particles with a primary charge opposite to that of the polyelectrolyte. The initial periods of both rapid and slow mixing are critical in the formation of flocs. Large, strong flocs were obtained with high‐molecular‐weight (>;10 5 ) polymers. A simplified model was developed to predict the average floc size based on the molecular weight of the polyelectrolyte and the mixing intensity.