Treatment of Metal Industrial Wastewater by Fly Ash and Cement Fixation
Publication: Journal of Environmental Engineering
Volume 120, Issue 6
Abstract
A process for the treatment of industrial wastewater containing heavy metals, using fly ash adsorption and cement fixation of the metal‐laden adsorbent, was investigated. Results show that the fly ash can be an effective metal adsorbent, at least for Zn(II) and Cd(II) in dilute industrial wastewaters. Fly ash adsorption capacities for Zn(II) and Cd(II) were 0.27 mg/g and 0.05 mg/g, respectively. A mortar specimen prepared with 10% metal‐laden fly ash showed a 56‐day strength, about the same or even greater than that of cement alone. Leachates from the fixed metal‐laden fly ash, obtained by using both the ASTM and U.S. Environmental Protection Agency‐extraction procedure (USEPA‐EP) leaching tests, exhibit metal concentrations lower than the drinking water standards. Compressive strength and leaching test results suggest that metal‐laden fly ash can be considered for use in secondary construction materials.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 120 • Issue 6 • November 1994
Pages: 1470 - 1487
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Nov 20, 1992
Published online: Nov 1, 1994
Published in print: Nov 1994
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