Record Display for the EPA National Library Catalog

RECORD NUMBER: 28 OF 34

OLS Field Name OLS Field Data
Main Title Removal of Mutagens from Drinking Water by Granular Activated Carbon: Evaluation Using Bacterial Mutagenicity Tests.
Author Monarca, S. ; Meier, J. R. ; Bull, R. J. ;
CORP Author Health Effects Research Lab., Cincinnati, OH.
Year Published 1983
Report Number EPA/600/J-83/248;
Stock Number PB84-243963
Additional Subjects Water treatment ; Bioassay ; Mutagens ; Potable water ; Activated carbon ; Ohio River ; Performance evaluation ; Bacteria ; Toxicity ; Reprints ; Granular activated carbon treatment ; Biological indicators ; Ames test ; Reverse osmosis
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB84-243963 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 16p
Abstract
The performance of a full-scale granular activated carbon (GAC) treatment system in removing mutagens from drinking water obtained from the Ohio River has been evaluated using two bacterial mutagenicity tests. The Salmonella microsome assay (Ames Test) and a fluctuation assay were both performed using Salmonella typhimurium strains TA98 and TA100. Influent and effluent waters were collected at two GAC adsorbers, one filled with virgin GAC and one with nearly exhausted GAC. The samples were submitted to reverse osmosis (RO) pre-concentration, sequential liquid liquid extractions and XAD-2 resin adsorption. The RO aqueous concentrations of both influents gave positive mutagenic responses with both strains in the fluctuation assay but no activity in the Ames test. The extracts and adsorbates showed mutagenic responses in the Ames test with both strains, the highest values being observed with TA100 in the absence of metabolic activation. The summation of mutagenic activity on the basis of net revertants per liter indicated that exhausted GAC removed a substantial fraction (more than 85%) of the mutagenic activity whereas virtually complete removal was observed with virgin GAC. These data suggest that short-term mutagenicity tests may be useful in evaluating the performance of GAC or other adsorbents used in the treatment of drinking water.