ULTRASOUND-ENHANCED COPPER REMOVAL BY HYDROUS IRON OXIDE ADSORPTION

H.R. Campos1 and P.E. Wheat2, 1Universidad de Tarapaca, Arica, Chile, and 2Department of Industrial Technology, University of Northern Iowa, Cedar Falls, IA, 50614, Ph: 319-273-2584, E-mail: Patrick.Wheat@UNI.EDU

ABSTRACT A model system to investigate ultrasound-enhanced removal of metallic ions from aqueous solution by hydrous ferric oxide (HFO) adsorption has been conducted. The ex-perimental data indicate that ultrasonic treatment of pre-formed HFO flocs can lead to enhanced removal of metallic ions from aqueous solution and that the level of enhancement is strongly cor-related with the solution pH. Ultrasonic treatment has been shown to be effective at lowering the final solution concentration of copper species in the pH range 7.5-9.5 at copper to iron molar con-centration ratios of 10 and 30%.

KEYWORDS: hydrous ferric oxide, iron III oxide, ultrasound, adsorption, heavy metals

This paper is from the Proceedings of the HSRC/WERC Joint Conference on the Environment, May 1996, published in hard copy and on the Web by the Great Plains/Rocky Mountain Hazardous Substance Research Center.

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