الفهرس 
: IntroductionOnly 14 pages are availabe for public view
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Abstract
The development of effective and workable wastewater treatments is becoming more and more important. Cementation reaction is one of the hopeful methods as it is simple and efficient and compared with traditional processes, has the benefits of short treatment times and low sludge production. Removal of copper by cementation on zinc disc from dilute copper sulfate solution in a recirculating batch reactor which consisted of a horizontal zinc disc impinged by an axial turbulent unsubmerged jet was studied.The effect of different parameters such as initial copper ion concentration, solution velocity, and the axial distance between the zinc disc and the unsubmerged jet on the rate of copper ion removal was investigated.The rate of cementation was found to increase with increasing solution velocity, decreasing the axial distance between the zinc disc and the unsubmerged jet. The rate of diffusion-controlled cementation of copper ions was expressed in terms of the mass transfer coefficient, the data were correlated in dimensionless correlation. The high rate of mass transfer of the jet reactor qualifies the reactor for diffusioncontrolled heavy metals removal from wastewater.