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The effects of branching and other physical properties of anionic polyacrylamides on the flocculation of domestic sewage
Author(s) -
Anthony Alan J.,
King Paul H.,
Randall Clifford W.
Publication year - 1975
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1975.070190104
Subject(s) - flocculation , polyacrylamide , polymer , radius of gyration , branching (polymer chemistry) , polyelectrolyte , polymer chemistry , chemical engineering , chemistry , hydrolysis , polymerization , hydrodynamic radius , materials science , chromatography , organic chemistry , copolymer , engineering
This investigation was undertaken to evaluate the effect of long‐chain branching of anionic polyacrylamides on the flocculation of domestic sewage. The polyelectrolytes were polymerized using a redox couple, selectively hydrolyzed, and then characterized by means of light‐scattering photometry. Coagulation tests were then employed to evaluate the synthesized polymers. The optimum polymer dose for suspended solids removal was used as the basis for evaluating each anionic polyacrylamide fraction with respect to its ability to flocculate domestic sewage. The results of this investigation indicated that as the weight‐average molecular weight increased, the optimum polymer dose decreased. For polymers of similar molecular weights and differing radii of gyration, as the radius of gyration increased, the optimum polymer dose decreased, indicating that the “linear” polymers were more efficient in removing suspended solids than the “branched” polymers.