Hypochlorous Acid-Activated Carbon: An Oxidizing Agent Capable of Producing Hydroxylated Polychlorinated Biphenyls

Granular activated carbon (GAC), in the presence of dilute aqueous hypochlorite solutions typical of those used in water treatment, was converted to a reagent capable of carrying out free-radical coupling reactions and other oxidations of dilute aqueous solutions of phenols. The products included bi...

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Bibliographic Details
Published in:Environmental health perspectives 1986-11, Vol.69, p.97-100
Main Authors: Voudrias, Evangelos A., Larson, Richard A., Snoeyink, Vernon L., Abraham S. C. Chen, Stapleton, Pat L.
Format: Article
Language:English
Subjects:
Activated carbon
Carbon
Chlorine
Dimers
Disinfectants
Free Radicals
Hydroxylation
Hypochlorous Acid
Mass spectra
Oxidation
Oxidation-Reduction
Phenols
Polychlorinated Biphenyls
Studies on Complex Mixtures
Water Supply - analysis
Water treatment
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Summary:Granular activated carbon (GAC), in the presence of dilute aqueous hypochlorite solutions typical of those used in water treatment, was converted to a reagent capable of carrying out free-radical coupling reactions and other oxidations of dilute aqueous solutions of phenols. The products included biphenyls with chlorine and hydroxyl substitution (hydroxylated polychlorinated biphenyls). For example, 2,4-dichlorophenol, a common constituent of wastewaters and also natural waters treated with hypochlorite, was converted to 3,5,5′trichloro-2,4′-dihydroxybiphenyl and several related compounds in significant amounts. It is possible that these products pose more of a health hazard than either the starting phenols or the unhydroxylated polychlorinated biphenyl derivatives.
ISSN:0091-6765
1552-9924
DOI:10.1289/ehp.866997