Flocculation Mechanism: Charge Neutralization and Bridging

Science  28 Jun 1968:
Vol. 160, Issue 3835, pp. 1449-1450
DOI: 10.1126/science.160.3835.1449


Electrophoresis measurements and electron-microscope observations with two model colloids and a polymeric flocculant show zeta-potential changes and details of floc structure. Fibers of the flocculant extend radially from the particle surface and vary in thickness from 20 to 300 angstroms. Both charge neutralization and bridging may function simultaneously.