Record Display for the EPA National Library Catalog

RECORD NUMBER: 12 OF 26

OLS Field Name OLS Field Data
Main Title Evaluation of Ozonation By-Products from Two California Surface Waters.
Author Glaze, W. H. ; Koga, M. ; Cancilla, D. ; Wang, K. ; McGuire, M. J. ;
CORP Author North Carolina Univ., Chapel Hill. Dept. of Environmental Sciences and Engineering.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.;Southern California Metropolitan Water District, Los Angeles.;National Science Foundation, Washington, DC.;California Univ., Los Angeles. Toxic Substances Research and Teaching Program.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/518;
Stock Number PB91-183178
Additional Subjects Surface waters ; Ozonization ; Water treatment ; Chemical analysis ; Field tests ; Laboratory tests ; Byproducts ; Contaminants ; Aqueducts ; Aldehydes ; Ketones ; Bromoform ; Reprints ; Southern Region(California)
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB91-183178 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 09/04/1991
Collation 11p
Abstract
Ozonation by-products were analyzed for two surface water sources in Southern California--Los Angeles Aqueduct Water (LAAW) and State Project Water (SPW). Included are data obtained when LAAW was being treated at the Los Angeles Aqueduct Filtration Plant and similar data obtained during a two-day experiment in which the plant was treating SPW. Some batch-scale ozonation studies are also reported. Ozonation by-products were monitored using three methods: closed-loop stripping analysis, nonionic resin accumulation, and a direct aqueous derivatization method for low-molecular-weight aldehydes, each followed by gas chromatography-mass spectrometry analysis of the extracts. The major neutral by-products appear to be aliphatic aldehydes, but the levels are unexpectedly low in SPW compared with LAAW treated under similar conditions. Low levels of several other compounds were found in ozonated water, including bromoform and some compounds tentatively identified as ketones.