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An Alternative Method for the Treatment of Waste Produced at a Dye and a Metal-Plating Industry Using Natural and/or Waste Materials

University of Cyprus, Department of Civil and Environmental Engineering, 75, Kallipoleos, 1678 Nicosia, Cyprus, dfatta{at}ucy.ac.cy

Achilleas Papadopoulos

National Technical University of Athens, School of Chemical Engineering, 9, Heroon Politechniou Str., 15773 Athens, Greece

Nikos Stefanakis

National Technical University of Athens, School of Chemical Engineering, 9, Heroon Politechniou Str., 15773 Athens, Greece

Maria Loizidou

National Technical University of Athens, School of Chemical Engineering, 9, Heroon Politechniou Str., 15773 Athens, Greece

Chrysanthos Savvides

Department of Labour Inspection, Ministry of Labour and Social Insurance, 12 Apelli Str., 1480 Nicosia, Cyprus

The aim of this study was to develop cost-effective, appropriate solidification technologies for treating hazardous industrial wastes that are currently disposed of in ways that may threaten the quality of local groundwater. One major objective was to use materials other than cement, and preferably materials that are themselves wastes, as the solidification additives, namely using wastes to treat wastes or locally available natural material. This research examines the cement-based and lime-based stabilization/solidification (S/S) techniques applied for waste generated at a metal-plating industry and a dye industry. For the lime-based S/S process the following binder mixtures were used: cement kiln dust/lime, bentonite/lime and gypsum/lime. For the cement-based S/S process three binder mixtures were used: cement kiln dust/cement, bentonite/cement and gypsum/cement. The leachability of the wastes was evaluated using the toxicity characteristic leaching procedure. The applicability and optimum weight ratio of the binder mixtures were estimated using the unconfined compressive strength test. The optimum ratio mixtures were mixed with waste samples in different ratios and cured for 28 days in order to find the S/S products with the highest strength and lowest leachability at the same time. The results of this work showed that the cement- and lime-based S/S process, using cement kiln dust and bentonite as additives can be effectively used in order to treat industrial waste.

Key Words: Cement- and lime-based stabilization/solidification • heavy metals • treatment of industrial waste • wmr 724-3

Waste Management & Research, Vol. 22, No. 4, 234-239 (2004)
DOI: 10.1177/0734242X04045428


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