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http://dx.doi.org/10.5762/KAIS.2015.16.1.906

Study on recovery of heavy metals from red mud by using the ultrasonic waves  

Lim, Ki-Hyuk (Dept. of Env. Engineering, Hanseo University)
Shon, Byung-Hyun (Dept. of Env. Engineering, Hanseo University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.16, no.1, 2015 , pp. 906-913 More about this Journal
Abstract
The red mud generated from the Bayer alumina production process seriously threatens the environment and human safety. Therefore, the reduction and recycling of red mud is an urgent topic in the aluminum industry. In this study, the effects of four parameters, ultrasound power, reaction temperature, time, and acid concentration, on the leaching of Fe, Al from red mud was investigated. The major parameters influencing the metal recovery efficiency from red mud were ultrasound power and reaction temperature. The use of ultrasonic irradiation resulted in 1.72 and 1.28 times higher recovery efficiency for Fe and Al, respectively. The proper conditions for the recovery of the metal components present in the red mud is the ultrasound intensity (150 W), sulfuric acid concentration (4-6N), reaction temperature ($70^{\circ}C$), and reaction time (2 hours), etc.
Keywords
Bayer process; Metal leaching; Red mud; Sulfuric acid; Ultrasound power;
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Times Cited By KSCI : 1  (Citation Analysis)
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