Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Fate of 3,3'-Dichlorobenzidine in aquatic environments /
Author Sikka, Harish C. ; Appleton, Henry T. ; Banerjee, Sujit
Other Authors
Author Title of a Work
Appleton, Henry T.
Banerjee, Sujit
CORP Author Syracuse Research Corp., NY. Life Sciences Div.;Environmental Research Lab., Athens, GA.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, Environmental Research Laboratory,
Year Published 1978
Report Number EPA/600/3-78/068; EPA-R-804584
Stock Number PB-286 526
Subjects Benzidine. ; Dichlorobenzidine.
Additional Subjects Sediments ; Decomposition ; Food chains ; Bioaccumulation ; Water pollution ; Public health ; Dyes ; Chlorine organic compounds ; Chemical analysis ; Concentration(Composition) ; Transport properties ; Lakes ; Photolysis ; Fresh water fish ; Metabolism ; Pigments ; Gas chromatography ; Extraction ; Adsorption ; Benzidine/dichloro ; Water pollution effects(Animals) ; Path of pollutants ; Bluegills
Library Call Number Additional Info Location Last
NTIS  PB-286 526 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation ix, 50 pages : tables ; 27 cm.
Several aspects of the aquatic environmental fate of 3,3'-dichlorobenzidine (DCB), a suspected human carcinogen, were examined. Greater than 95% of dichlorobenzidine present was adsorbed to natural pond and lake sediments in aqueous suspensions. Only a portion of the adsorbed chemical could be extracted from the sediments, with this amount decreasing over time, suggesting chemical reaction of DCB with sediment constituents. Dichlorobenzidine was rapidly degraded by natural and artificial light in aqueous solution, with a half-life of the order of 90 seconds in natural sunlight. Monochlorobenzidine and benzidine were found to be intermediate products of this process. In contrast, DCB appeared recalcitrant to degradation by naturally occurring aquatic microbial communities with only a minor loss of chemical detected over a 30-day incubation period. Dichlorobenzidine was rapidly bioconcentrated in bluegill sunfish, with mortality occurring prior to establishment of a chemical equilibrium between water and fish. Bioconcentration factors of 132-554 were achieved at this point. The only metabolite detected in the fish was an acid-labile conjugate of DCB. Based on these observations, chemical and physical processes, rather than biological ones, appear to be the important factors governing the fate of DCB in the aquatic environment. The ability of DCB to concentration in aquatic organisms may pose a direct hazard to human health through consumption of contaminated fish.
Grant no. R804-584-010. Microfiche.