Premium
Stoichiometric Relationship Between Humic and Fulvic Acids and Flocculants
Author(s) -
Narkis Nava,
Rebhun Menahem
Publication year - 1977
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.1551-8833.1977.tb06752.x
Subject(s) - flocculation , chemistry , polyelectrolyte , cationic polymerization , alum , inorganic chemistry , sulfate , carboxylate , stoichiometry , humic acid , dissociation (chemistry) , organic chemistry , polymer , fertilizer
The investigation of the flocculation of humic and fulvic acids has shown that the sodium salts of these acids, which are anionic polyelectrolytes, react chemically with the flocculants, such as cationic polyelectrolytes, and aluminum sulfate through carboxylate and phenolate groups. A stoichiometric relationship has been found between humic and fulvic acids content in solution and the cationic polyelectrolyte or alum dose required for effective flocculation of the humic substances. As the pH value becomes lower, flocculation is better; the degree of dissociation of the organic molecule is lower, and the flocculant requirement is lower.