Tetsuo Oishi, Kazuya Koyama
In order to develop an energy-saving copper recycling process from wastes, electrochemical measurements were conducted in ammoniacal alkaline solutions containing Cu(I) ions and an ammonium salt of sulfate, chloride or nitrate. The results of each system were then compared. The polarization measurements suggested that the voltage required for the electrode process is lower in the chloride and nitrate systems than that in the sulfate system. The cathode current efficiency during the copper electrodeposition varied from 39 to 97% and increased with current density in the chloride and sulfate systems. In the nitrate system, the lowest cathode current efficiency of 30% was observed because of nitrate ion reduction. Based on these results, the power consumption required for the electrowinning stage of the copper recycling process was calculated. Among these three systems, the chloride system showed the lowest power consumption of 500 kWh t − 1 at the current density of 200 A m − 2, which is about 25% of the conventional copper electrowinning process from a copper sulfate–sulfuric acid solution.
@article{7b13f00b-3616-46a8-a0a9-c806c2009314,
title={Influence of ammonium salt on electrowinning of copper from ammoniacal alkaline solutions},
author={Tetsuo Oishi and Kazuya Koyama},
year={2007},
language={en}
}TY - JOUR TI - Influence of ammonium salt on electrowinning of copper from ammoniacal alkaline solutions AU - Tetsuo Oishi AU - Kazuya Koyama PY - 2007 LA - en ER -
The leachability tests for manufacturing scrap TV boards (STVB) have indicated the release of metals beyond the limit levels with potential problems f
Željko Kamberović, Marija Korać, Dragana Ivšić, Vesna Nikolić, Milisav Ranitović
Used electronic equipment became one of the fastest growing waste streams in the world. In the past two decades recycling of printed circuit boards (P
Copper solvent extraction units at large hydrometallurgical plants face constraints in metal recovery, phase disengagement, and reagent consumption, d
Mark E. Schlesinger, Matthew J. King
This book presents a comprehensive overview of the principles and practices of copper extraction metallurgy. The objective is to provide both a theore
Oyuna Tsydenova, Magnus Bengtsson
This review paper summarizes the existing knowledge on the chemical hazards associated with recycling and other end-of-life treatment options of waste
Jirang Cui, Hans Jørgen Roven
Rapid growth in electronic equipment consumption has generated large quantities of electronic waste containing hazardous substances and high-value met