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RECORD NUMBER: 203 OF 282

Main Title Removing Trihalomethane Precursors by Coagulation.
Author Hubel, R. E. ; Edzwald, J. K. ;
CORP Author Massachusetts Univ., Amherst.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Year Published 1987
Report Number EPA-R-807034; EPA/600/J-87/119;
Stock Number PB88-144381
Additional Subjects Water pollution ; Coagulation ; Potable water ; Chemical removal(Water treatment) ; Halogenation ; Chorination ; Graphs(Charts) ; Carcinogens ; Polymers ; Humic acids ; Reprints ; THM(Trihalomethane)
Holdings
Library Call Number Additional Info Location Last
Modified		 Checkout
Status
NTIS  PB88-144381 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12p
Abstract
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. (Copyright (c) Journal of American Water Works Association 79(7):98-106, July 1987.)