Naslov
Optimization of Electrochemical Copper Recovery Process: Effect of the Stirring Speed in Chloride Medium of pH=3

Autori
Touabi, Noura ; Martinez, Sanja ; Bounoughaz, Moussa

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
5th ISE Regional Symposium on Electrochemistry, Book of Abstracs / Sopčić, Suzana - Zagreb : Sveučilište u Zagrebu, Fakultet kemisjkog inženjerstva i tehnologije, 2015, 1-1

Skup
5th ISE Regional Symposium on Electrochemistry

Mjesto i datum
Zagreb, Hrvatska, 03.07.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
bakar ; elektrokemijsko dobivanje ; ciklička voltametrija
(copper ; electrochemical recovery ; cyclic voltammetry)

Sažetak
The wastewater pollution by heavy metals remains today one of the important problems to solve in the industrialized countries. Various conventional methods are used to remove these metals. In the present work, the effect of the stirring speed on copper recovery by electrodeposition from synthetic medium of pH=3 has been studied. In order to optimize electrodeposition and facilitate recovery, we have used a chloride electrolyte [1]. Copper was deposited potentiostatically on a graphite electrode with graphite auxiliary electrode and saturated calomel electrode as a reference. Cyclic voltammetry, electrochemical impedance spectroscopy and chronoamperometry were used to characterize the kinetics of nucleation and electroplating of copper deposits. The study of the effect of the scanning rate on cyclic voltammograms in the presence and absence of agitation shows that the copper was deposited under diffusion control in quasi reversible process with partial oxidation of bulk deposited copper. Characterization of the deposits formed at different stirring speeds was done by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and Xray diffraction (XRD).The quality of the deposits obtained depended strongly on agitation. Our goal was to obtain copper deposit which was easily removable from the cathode due to a dentritic growth mechanism in the presence of chlorides ions. Excellent copper removal percentage and the current efficiency of the deposition, equal to 94% and 99% respectively, have been obtained at a steering speed of 1500rpm [2].

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA