Evaluation of Fe oxide-coated GAC for removal and recovery of Cu(II) from waterby T. C. Wang, Illinois Inst of Technology, Chicago, United States,
K. P. Chandra, Illinois Inst of Technology, Chicago, United States,
P. R. Anderson, Illinois Inst of Technology, Chicago, United States,
Abstract: A composite solid, prepared by precipitating an Fe oxide onto granular activated carbon (GAC), was evaluated as an adsorbent for the removal and recovery of Cu(II) from water. Relative to adsorption onto uncoated GAC, Cu(II) adsorption capacity increased as the amount of Fe oxide increased, from about 1.4 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 100 μg Cu(II)/L solution was reduced to no more than 3 μg/L through 1000 bed volumes processed.
Subject Headings: Adsorption | Activated carbon | Composite materials | Solid mechanics | Water management | Metals (chemical) | Wastewater treatment | Granular materials
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