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J Hazard Mater. 2009 Jul 15;166(1):74-8. doi: 10.1016/j.jhazmat.2008.10.125. Epub 2008 Nov 11.

Removal of chromium Cr(VI) by low-cost chemically activated carbon materials from water.

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  • 1Department of Materials Science & Engineering, University of Illinois at Urbana-Champaign, 1304 W Green St., Urbana, IL 61801, USA.


Low-cost, chemically activated carbon materials, Pellet-600 and PVA-300, were prepared at relatively low temperatures and show more effective removal efficiency of Cr(VI) from water than commercially available activated carbons tested. The Pellet-600 is a pelletized carbon material with high mesoporous volumes and surface area, and the PVA-300 is composed of a high surface area carbon coating on a fiberglass mat substrate. A much faster adsorption kinetics and a much higher adsorption capacity for Cr(VI) are achieved by the Pellet-600. At very low concentrations of Cr(VI), the PVA-300 displays a strong adsorption ability for Cr(VI). XPS data show an increase in the atomic ratio of Cr/C and oxidation of carbon materials after adsorption of Cr(VI). These results suggest that a high content of mesopores with a high surface area and surface functional groups greatly improve the Cr(VI) removal efficiency from water.

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