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Influence of sludge age on copper (2+) and chromium (3+) uptake by activated sludge

Journal Article · · Sep. Sci. Technol.; (United States)
This paper reports the results obtained on Cu/sup 2 +/ and Cr/sup 3 +/ uptake by activated sludge of 7 and 12 d sludge age. Removal efficiencies of these heavy metals decrease when their initial concentrations increase. For the Cu/sup 2 +/, sludges of lower age adsorb 12% less over the range of the metal concentration added. The Cr/sup 3 +/ adsorption was a function of both sludge age and initial concentration For an initial concentration of 32 mg/L, both sludges gave identical removals. The stability of bound, metal-activated sludge increases when the sludge age increases for Cu/sup 2 +/. The opposite effect has been noted with Cr/sup 3 +/.
Research Organization:
Univ. of Madrid (Spain)
OSTI ID:
7200582
Journal Information:
Sep. Sci. Technol.; (United States), Journal Name: Sep. Sci. Technol.; (United States) Vol. 23:1-3; ISSN SSTED
Country of Publication:
United States
Language:
English