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The Scientific World Journal
Volume 2012, Article ID 758719, 8 pages
http://dx.doi.org/10.1100/2012/758719
Research Article

Statistical Evaluation and Optimization of Factors Affecting the Leaching Performance of Copper Flotation Waste

1Department of Environmental Engineering, Ondokuz Mayıs University, 55139 Samsun, Turkey
2Department of Industrial Engineering, Ondokuz Mayıs University, 55139 Samsun, Turkey
3Department of Chemical Engineering, Ondokuz Mayıs University, 55139 Samsun, Turkey

Received 11 October 2011; Accepted 19 December 2011

Academic Editor: Sushil R. Kanel

Copyright © 2012 Semra Çoruh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Copper flotation waste is an industrial by-product material produced from the process of manufacturing copper. The main concern with respect to landfilling of copper flotation waste is the release of elements (e.g., salts and heavy metals) when in contact with water, that is, leaching. Copper flotation waste generally contains a significant amount of Cu together with trace elements of other toxic metals, such as Zn, Co, and Pb. The release of heavy metals into the environment has resulted in a number of environmental problems. The aim of this study is to investigate the leaching characteristics of copper flotation waste by use of the Box-Behnken experimental design approach. In order to obtain the optimized condition of leachability, a second-order model was examined. The best leaching conditions achieved were as follows: pH = 9, stirring time = 5 min, and temperature = 41.5°C.