Removal of chromium Cr(VI) by low-cost chemically activated carbon materials from water.
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.
Yue
Zhongren
Z
Department of Materials Science & Engineering, University of Illinois at Urbana-Champaign, 1304 W Green St., Urbana, IL 61801, USA. zyue@utsi.edu
Bender
Samantha E
SE
Wang
Jinwen
J
Economy
James
J
D000327:Adsorption; D002606:Charcoal / Q000138:chemical synthesis / Q000737:chemistry* / Q000191:economics; D002857:Chromium / Q000302:isolation & purification*; D006256:Hazardous Waste / Q000517:prevention & control; D007700:Kinetics; D016062:Porosity; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
D006256:Hazardous Waste; D014874:Water Pollutants, Chemical; D002857:Chromium; D002606:Charcoal