Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Activated carbon process for treatment of wastewaters containing hexavalent chromium /
Author Huang, C. P. ; Bowers, Alan R.
Other Authors
Author Title of a Work
Bowers, Alan R.
CORP Author Delaware Univ., Newark.;Industrial Environmental Research Lab.-Cincinnati, OH.
Publisher Industrial Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency ; Available through the National Technical Information Service,
Year Published 1979
Report Number EPA/600/2-79/130; EPA-R-804656
Stock Number PB-300 765
OCLC Number 54010417
Subjects Carbon, Activated. ; Sewage--Purification--Adsorption. ; Chromium.
Additional Subjects Water pollution control ; Activated carbon ; Chromium ; Adsorption ; Concentration(Composition) ; Industrial waste treatment ; Economic analysis ; Physical properties ; Chemical properties ; Design ; Performance evaluation
Library Call Number Additional Info Location Last
NTIS  PB-300 765 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 x, 71 pages : illustrations ; 28 cm.
The removal of hexavalent chromium, Cr(VI), from dilute aqueous solution by an activated carbon process has been investigated. Two removal mechanisms were observed; hexavalent chromium species were removed by adsorption onto the interior carbon surface and/or through reduction to the trivalent state at the external carbon surface. The effects of Cr(VI) concentrations, pH, carbon dosage and extent of mixing in the reaction vessel were studied in the batch mode and in continuous flow packed column experiments in the laboratory. The adsorptive capacity of the carbon and the rates of Cr(VI) adsorption and reduction have been determined. Thermal regeneration of the exhausted carbon was examined, along with caustic or acid stripping solutions and a combined caustic-thermal process. A case study was presented and the experimental data and rate expressions obtained from the data were used to evaluate the design variables (i.e., pH, carbon dose, Cr(VI) concentration and mixing in the reaction vessel). Several Cr(VI) treatment schemes were proposed, together with an economic analysis of each scheme.
Prepared for U.S. Environmental Protection Agency, Office of Research and Development, Industrial Environmental Research Laboratory, under Grant no. R-804656. Includes bibliographical references (pages 64-66). Microfiche.