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GLRPPR Sector Resource: Evaluation of Fe Oxide-coated Granular Activated Carbon for Removal and Recovery of Cu(ii) and Cr(vi) from Aqueous Solution

Title:
Evaluation of Fe Oxide-coated Granular Activated Carbon for Removal and Recovery of Cu(ii) and Cr(vi) from Aqueous Solution

Abstract:
A composite solid, prepared by precipitating an Fe oxide onto granular activated carbon (GAC), was evaluated as an adsorbent for Cu(II) and Cr(VI) in aqueous solutions. Relative to adsorption onto uncoated GAC, increasing Fe oxide coatings decreased adsorption capacities for Cr(VI). In contrast, Cu(II) adsorption capacity increased as the amount of Fe oxide increased, from about 14 mg/g for GAC to 5 mg/g for GAC coated with 37 mg Fe oxide/g GAC. Tests in a column process for Cu(II) removal demonstrated that the composite adsorbent could be reused through at least 15 adsorption and desorption cycles. Although a fraction of the adsorbed Cu(II) was retained by the solid, there was no apparent loss in adsorption capacity. Treatment of low concentration solutions was effective, a 100mg Cu(II)/L solution was reduced to no more than 3 mg/L through 1000 bed volumes processed. Removal of complexed metals depends on the characteristics of the complex. However, even when all the Cu(II) was complexed by EDTA, breakthrough was retarded, probably by adsorption onto exposed GAC. (Length: 44 pages)

URL:
http://www.wmrc.uiuc.edu/main_sections/info_services/library_docs/rr/RR-E67.PDF

Source:
Illinois Waste Management and Research Center

Resource Type:
Article/report

Date of Publication:
April 1994

Associated Sectors:

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