الفهرس 
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Abstract
The aim of the present work is to enhance the rate of copper ions removal from the industrial wastewater by the cementation method. where the copper ions are cemented on multi-rotating aluminum cylinders arranged by circular and square configurations The Kinetics of the diffusion controlled cementation was studied under the following parameters for the two different configurations: 1. Initial copper sulphate concentration 2. Rotation speed.3. Aluminium rod diameter 4. Effect of presence of surfactant.The rate of cementation was expressed in terms of mass transfer coefficient (k) where the following consequences were found:1. The mass transfer coefficient increases with increasing initial copper concentration of CuSO4. 2. The mass transfer coefficient increases with increasing rotation speed of the multi-rotating cylindern3. The mass transfer coefficient increases by increasing the Aluminium rod diameter. The effect of surfactant such as Triton X-100 was studied and was found to reduce the rate of mass transfer from 34% to 74 % of Triton X-100 concentration ranges from 0 - 60 ppm at different rotational speed.The mass transfer correlation of the controlling parameter was deduced by dimensionless analysis is found to be: i. For the circular configuration Sh = 68 Re0.47 Sc 0.33 (d/L) 1.4 At the conditions 1727 < Sc < 2152, 3500 < Re < 24700< ii. For the square configuration Sh = 36 Re0.45 Sc 0.33 (d/L) 1.43 At the conditions 1727 < Sc < 2152, 3500 < Re < 24700