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Removing Trihalomethane Precursors by Coagulation
Author(s) -
Hubei Richard E.,
Edzwald James K.
Publication year - 1987
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.1551-8833.1987.tb02879.x
Subject(s) - alum , trihalomethane , turbidity , cationic polymerization , chemistry , coagulation , polymer , alkalinity , flocculation , aluminium sulfate , water treatment , pulp and paper industry , environmental chemistry , polymer chemistry , organic chemistry , environmental engineering , environmental science , ecology , psychology , chlorine , psychiatry , engineering , biology
The removal of trihalomethane precursors by coagulation was studied with low turbidity, low alkalinity waters containing high levels of aquatic humic matter. Jar tests were conducted with synthetic and natural waters using alum, high‐molecular‐weight polymers, cationic polymers, and various combinations of these coagulants. Cationic polymers alone were found to be less effective than alum in the coagulation of humic substances. High‐molecular‐weight polymers used as coagulant aids with alum improved turbidity removal but not precursor removal, whereas high‐charge‐density cationic polymers with alum as a coagulant aid provided good precursor removals at low alum dosages.