Effect of Cd2+ on Electrodeposition of Copper in Cyclone Electrodeposition

Abstract

A strategy to determine the effect of Cd2+ on the electrodeposition of copper from a copper electrolyte by cyclone electrowinning is presented. The concentration of Cu2+ in the copper electrolyte with different Cd2+ concentrations was determined by atomic absorption spectrometry (AAS). It indicated that the current efficiency, the rate of electrodeposition, and the rate copper electrodeposition decreased with the addition of Cd2+ in the three stages of electrodeposition. The current efficiency declined from 99.6 to 79.2% and the copper electrodeposition rate declined from 52 to 40% in the first electrodeposition. The current efficiency had no significant change, and the copper electrodeposition rate declined from 88 to 77% in the second electrodeposition. The current efficiency declined from 72.6 to 40.3%, and the copper electrodeposition rate was all at 99% in the third electrodeposition. The influences of the Cd2+ concentration on the purity and morphology of cathode copper were investigated. The effect of Cd2+ concentration on the purity and morphology of cathode copper was also studied. In the three-stage electrodeposition, the addition of the Cd2+ concentration mainly affected the microstructure of the cathode copper, but it had little effect on the purity of the cathode copper. The higher the amount of Cd2+, the rougher the morphology of the cathode copper and the larger the gap between the grains; the higher the amount of Cd2+, the lower the electrodeposition rate and current efficiency, though the reduction was small.

A method for using the residual energy in waste Li-ion batteries by regulating potential with the aid of overvoltage response

“…S4 ). The reason for this phenomenon was that the formation of Cu(OH) 2 by Cu 2+ and OH - inhibited the progress of the reaction when the solution pH was 5, but the electrosorption of Zn 2+ promoted the desorption of inhibiting species on the electrode in the mixed solution of Cu 2+ , Cd 2+ , and Zn 2+ ( 13 , 14 ). According to these phenomena and the reduction potentials of Cu 2+ , Cd 2+ , and Zn 2+ , it could be found that the battery potential was unstable during the overdischarge of the chemical discharge.…”

Preparation and Characterization of Cadmium(II)-Ion-Imprinted Composites Based on Epoxy Resin

“…12 To gain a better understanding of how imprinted polymers regulate the rate of Cd(II) adsorption, the adsorption kinetic data were fitted by pseudo-first-order model (eq 11) 45 and pseudo-second-order model (eq 12). 49 pseudo-first-order equation: (11) pseudo-second-order equation: i k j j j j j j y…”

“…Cd­(II) ion can be gradually accumulated from trace intake to excessive intake through the food chain system and eventually has certain effects on the bones, renal system, and blood system of animals and humans . Therefore, the search for the removal of Cd­(II) in the ecological environment has become a worldwide concern, − which includes techniques such as chemical precipitation, reverse osmosis, membrane technologies, electrodeposition, ion exchange, photocatalysis, adsorption methods, etc. Among the available technologies, adsorption is the most effective and economical method with minimal costs, easy operation, and great recyclability .…”