Record Display for the EPA National Library Catalog

RECORD NUMBER: 116 OF 351

OLS Field Name OLS Field Data
Main Title Effects of Activated Carbon on the Reactions of Free Chlorine with Phenols.
Author Voudrias, E. A. ; Larson, R. A. ; Snoeyink, V. L. ;
CORP Author Illinois Univ. at Urbana-Champaign.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Year Published 1985
Report Number EPA-R-805293; EPA/600/J-85/071;
Stock Number PB85-225530
Additional Subjects Water analysis ; Water treatment ; Chlorination ; Disinfectants ; Phenols ; Chlorine ; Chlorine organic compounds ; Potable water ; Phenol ; Catechol ; Chemical reactions ; Extraction ; Gas chromatography ; Mass spectroscopy ; Public health ; Reprints ; Granular activated carbon treatment ; Toxic substances ; Powder activated carbon ; Water pollution detection ; Pretreatment(Water) ; Polychlorinated biphenyls ; Phenol/dimethoxy ; Phenol/chloro ; Halomethanes ; Phenol/methoxy ; Environmental health
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB85-225530 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 10p
Abstract
The use of prechlorination in drinking water treatment results in contact of free chlorine with activated carbon which has been added to remove organic compounds from water. The chlorine then reacts with the carbon and adsorbed compounds. Free chlorine reacts readily with a group of phenolic compounds (phenol, guaiacol, catechol, 2,6-dimethoxyphenol, and p-chlorophenol) in dilute aqueous solutions (.00001 M) to produce mono-, di-, or trichloro derivatives, but when it reacts with phenols adsorbed on granular activated carbon (GAC), many additional products are formed. GAC exposed to chlorine becomes capable of promoting reactions such as hydroxylation of the aromatic ring, oxidation to quinones, chlorine substitution, carboxylation, and oxidative coupling (dimer formation). The formation of chloro-hydroxybiphenyls (hydroxylated PCBs) (in vivo metabolites of PCBs) is particularly important because of their potential toxicity. Such compounds are the main reaction products from chlorophenols, but they are also formed in smaller amounts from nonchlorinated phenols (phenol and guaiacol). (Copyright (c) 1985, American Chemical Society.)