Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Determination of the Toxicity of Trivalent and Hexavalent Chromium on the Oxygen Utilization of Sewage.
Author Kriege, H. L. ; Moor, W. Allan ;
CORP Author Environmental Health Center, Cincinnati, Ohio.
Year Published 1949
Stock Number PB-215 491
Additional Subjects ( Chromium ; Sewage treatment) ; ( Biochemical oxygen demand ; Trace elements) ;
Library Call Number Additional Info Location Last
NTIS  PB-215 491 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 9p
Although the toxic effect of a metal such as chromium on the normal B.O.D. of domestic sewage has been discussed before, sufficient information was desired in order to make a comparison of the oxygen utilization of the sewage without the chromium salts with those of increasing concentrations of chromium salts in terms of p.p.m. of dissolved oxygen depletions. The toxicity of both hexavalent and trivalent chromium has been observed in this experiment. The trivalent form showed the more consistent inhibition as the chromium concentration was increased. The hexavalent chromium reached a plateau in its effect on the B.O.D. of sewage when its concentration was 3.0 p.p.m., and further increases to 10 p.p.m. had no significant effect on the inhibition.