Izvorni znanstveni članak
Removal of copper from industrial wastewater by cementation on zinc in baffled batch-agitated vessels
A.A. Mubarak
Sažetak
Rates of Cu++ removal from waste solution by cementation on zinc in a baffled-agitated vessel lined with a cylindrical zinc sheet were studied under different conditions of impeller rotation speed, initial copper concentration, temperature and time of cementation. It was found that the rate of Cu++ removal increases with increasing impeller rotation speed, initial concentration, temperature and residence time at pH = 4. The cementation rate temperature dependence was found to be of Arrhenius type with an activation energy of 23 J/mol confirming the diffusion controlled nature of the reaction. Mass transfer study of the process has revealed that the data for the conditions: 57628 < Re < 485550 and 638 < Sc < 1697 fit the following dimensionless equation: Sh = 0.035Re0.89 Sc 0.33
Ključne riječi
Wastewater; cementation; copper removal; mass transfer; agitated vessels
Hrčak ID:
3495
URI
Datum izdavanja:
30.1.2006.
Posjeta: 1.525 *