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Stoichiometry of Coagulation
Author(s) -
Stumm Werner,
O'Melia Charles R.
Publication year - 1968
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.1551-8833.1968.tb03579.x
Subject(s) - coagulation , adsorption , colloid , stoichiometry , phase (matter) , chemistry , impurity , chemical engineering , thermodynamics , chromatography , organic chemistry , physics , engineering , psychology , psychiatry
The objectives of this study were to examine the adsorption of coagulants on the colloids present in water and to interpret this adsorption in terms of coagulation and restabilization; and, based upon a consideration of chemical and electrostatic interactions in the destabilization of colloids, to develop a conceptual model relating optimum coagulation with pertinent solution variables. A simple adsorption model is presented which permits, in principle, a quantitative description of the interrelationships between the coagulant dose, pH, and the surface area of the dispersed phase. This model is useful in evaluating the circumstances under which a stoichiometric relationship exists between the required coagulant dose and the concentration of colloidal impurities in the water.