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Trends in Chemical Engineering   Volumes    Volume 14 
Removal of copper from dilute solutions by cementation in a bubble column reactor fitted with a horizontal fixed bed of iron screens: A mass transfer study
E-S. Z. El-Ashtoukhy, M. H. Abdel-Aziz
Pages: 57 - 64
Number of pages: 8
Trends in Chemical Engineering
Volume 14 

Copyright © 2012 Research Trends. All rights reserved

The kinetics of the cementation of copper ions from copper sulphate solution onto horizontal single screen and an array of closely packed iron screens were investigated in a bubble column. Variables studied were physical properties of the solution, superficial gas velocity and number of screens per array. The rate of cementation was found to increase with increasing superficial gas velocity to a certain limit and then remains constant and increases with increasing the number of screens per array. The rate of cementation was expressed in terms of the liquid-solid mass transfer coefficient (k). The data was correlated by the equation: j = 3.99 (Re.Fr)-0.078. The high rates of mass transfer obtained in this work and the high area per unit volume of gas sparged fixed bed of horizontal screens qualify them for building high space time reactors suitable for purification of hydrometallurgical leach liquors and removal of heavy metal from waste water by cementation.               
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