Isabel F.F. Neto, Cátia A. Sousa
The large amount of Cu present in printed circuit boards (PCBs) residues, usually about ten times more than the Cu amount present in rich-content minerals, makes these residues an attractive secondary source of Cu. Thus, the main aim of this work was to develop a simple and nearly-closed two-step process to recover Cu from PCBs residues with high purity. Firstly, a multi-element leaching solution, containing 78% of the total amount of Cu present in the residue together with other metals, was obtained using acidic (HNO3 2 mol/L for 210 °C) conditions. In a second step, a bispicolylamine resin was used to recover Cu with high selectivity from the multi-element (59.0% Cu) leaching solution and a final Cu solution with high purity (99.0%) was obtained after eluting, with H2SO4 4 mol/L, the Cu retained in the column. Additionally, the amount of Al (85%) leached from the residue, present in the raffinate, was totally recovered as a solid of Al(OH)3.
@article{00fec4e0-5585-425d-9450-79577b3d1314,
title={A simple and nearly closed cycle process},
author={Isabel F.F. Neto and Cátia A. Sousa},
year={2026},
language={en}
}TY - JOUR TI - A simple and nearly closed cycle process AU - Isabel F.F. Neto AU - Cátia A. Sousa PY - 2026 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
Printed circuit boards (PCBs) from electronic gadgets at the end of their useful life period are currently being dumped in landfills or incinerated, c