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Vol. 27 No. 12 (2015): Vol 27 Issue 12

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Influence of Vitamin C on Copper Electrorefining from Acidic Solution of Copper Sulfate

https://doi.org/10.14233/ajchem.2015.19119
F.M. Abouzeid
Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt

Corresponding Author(s) : F.M. Abouzeid

fatmaabouzeid44@yahoo.com

Asian Journal of Chemistry, Vol. 27 No. 12 (2015): Vol 27 Issue 12

Abstract

Electrorefining of copper in the presence of vitamin C was studied using potentiodynamic polarization method. The effect of operating conditions including sulphuric acid concentration, temperature and vitamin C concentration on limiting current. The results show that Cu deposit from its acidic solution of copper sulfate and rate of deposition decrease with increasing the concentration of suphuric acid. Vitamin C is a suppresser with the strongest action on copper electrodeposition and inhibition efficiencyincreased by increasing vitamin C concentration. The activated parameters were estimated and discussed. The adsorption of vitamin C on cathode copper surface in the acid solution was found to obey Kinetic-thermodynamic adsorption isotherm. The influence of vitamin C on morphology of electrodeposited powder was studied. Addition of vitamin C to copper bath exhibits a strong influence on the microstructure (refining the deposit).

Keywords

Copper refining Vitamin C Scanning electron microscope Current efficiency
Abouzeid, F. (2015). Influence of Vitamin C on Copper Electrorefining from Acidic Solution of Copper Sulfate. Asian Journal of Chemistry, 27(12), 4337–4343. https://doi.org/10.14233/ajchem.2015.19119
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