•Coagulation
–Increase in particle size from the joining of like particles
–Promote by reducing charge repulsion
•Addition of multivalent ions (e.g. Al3+)
•Adjust pH to isoelectric point
•Flocculation
–increase in particle size by addition of agents acting as bridges between particles
–Generally polyelectrolytes that neutralise surface charges on particles and then link particles to form aggregates
No comments:
Post a Comment