Removal of chelated cupric ions from industrial effluents by cementation on zinc using a rotating cylinder batch reactor

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Chemical Eng. Dept., Faculty of Eng., Alexandria University, Alexandria, Egypt [1 ]
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AEJ - Alexandria Engineering Journal | 2008年 / 47卷 / 01期
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Rate of Cu++ removal from simulated industrial effluents by cementation on rotating zinc cylinder was studied in presence of chelating agents. Parameters studied were; initial Cu++ concentration; type of chelating agents (citric and tartaric acid); speed of rotation; temperature and pH. It was found that the presence of chelating agents inhibits the cementation reaction by a percentage ranging from 9.89% to 34.4% at 20°C. Citric acid has a higher inhibition effect than tartaric acid. The cementation reaction kinetic follows first order kinetics. At pH [less-than or equal to] 2 the chelating agent has a negligible effect on the cementation rate. The activation energy lies between 3.7 to 9.3 kcal/mol indicating a diffusion-controlled cementation mechanism even in the presence of chelating agents. © Faculty of Engineering; Alexandria University;
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