A Green Process for Copper Recovery from Waste Printed Circuit Boards

Abstract

In the present study, a green process for cuprous chloride synthesis from waste printed circuit boards (PCBs) was developed. High value-added cuprous chloride (98.7% purity) was obtained by treating metallic particles of waste PCBs with solution of cupric sulfate and sodium chloride. Typical noble metal (Pd) was dissolved by forming a stable chloride complex during the synthesis process as Cu2+ played the role of oxidant or concentrated in the residue. Under the optimum condition (VNaCl/mCuSO4 ratio = 6, [C/[Cu2+] mole ratio = 1.05, treatment time = 30 min, operation temperature = 60 °C), yield of cuprous chloride was 74.0% and approximately 98.5% of the copper could be recovered. It is believed that the process proposed is effective and practical for Cu recovery from waste PCBs.

Detailed investigation of the binding abilities of the heterodomain of a multiHis cyclopeptide toward Cu(II) ions

“…Peptide ligands can also find application in medicine, sensing, and environmental remediation [11]. In particular, Cu recovery from electronic wastes [12], may become particularly relevant with the inclusion of copper in the European list of Critical Raw Materials [13]. In this case, the reversible formation of copper complexes would be important to enable copper recycling from composite matrices.…”

Selective recovery of palladium from waste printed circuit boards by a novel non-acid process

“…Palladium was enriched during copper recovery process according to our previous study [27,28] with minor modification. The flow chart of the whole process was shown in Fig.…”