الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Copper is one of the metals of major importance in many industrial applications and at the same time is considered a major hazardous metal regarding its effect on health and on the environment if present above certain limits. Copper present in many industries process and discharged in their wastewater streams. These industries include electroplating, mining, metal processing and finishing and chemicals manufacturing. The objective of the present work is to investigate the effect of using rotating grooved discs instead of solid flat disc to develop a new rotating grooved disc contactor (RGDC) suitable for conducting diffusion controlled liquid-liquid extraction. To this end, the performance of grooved rotating disc was studied by measuring volumetric mass transfer coefficient for the extraction of copper ions from water-copper sulphate mixture by naphthenic acid in Kerosene.Variables studied were initial concentration of copper ions, disc rotational speed, concentration of naphthenic acid, flow rates of continuous and dispersed phase, degree of roughness, and number of discs. It was found that the rate of mass transfer increases by increasing disc rotational speed, dispersed phase flow rate, degree of roughness, concentration of naphthenic acid and by increasing number of discs till four discs and it was found that the rate of mass transfer decreases by increasing concentration of feed solution, continuous phase flow rate and by increasing number of discs more than four. The data was correlated by the following dimensionless equation: Shm = 311 Sc0.33 Res0.3 Rec-0.4 Red0.45 (S/d)-0.45 To assist in assessing the economic feasibility of the extractor, mechanical power consumed in rotating discs was measured under different conditions.