Lead Oxide Enhances the Leaching of Gold in Cyanide Tailings

Green Aqueous Two-Phase Systems Constructed by Guanidinium Ionic Liquid for Efficient Recovery of Gold(I) from Thiosulfate Solution

“…Cyanidation has been the predominant technique for extracting gold from ore for over a century, primarily due to its relative simplicity, high efficiency, and cost-effectiveness. 1 This process uses cyanide to extract gold from raw ore by means of the strong coordination properties of cyanide anions, which allows cyanide ions to coordinate with gold to form soluble Au(CN) 2 − anions. 2 However, cyanide is identified as a particularly hazardous reagent that can be potentially harmful to the environment if not properly managed.…”

“…These GILs were characterized by 1 H NMR with DMSO-d 6 as a solvent, and the spectra are shown in Figure S1. 1 Phase Diagrams.…”

“…These GILs were characterized by 1 H NMR with DMSO-d 6 as a solvent, and the spectra are shown in Figure S1. 1 Phase Diagrams. Cloud point titration was used to measure the GIL-based ATPS phase diagram at 298.15 K. Prior to the experiment, a solution of K 2 HPO 4 with a specific concentration was prepared.…”

“…A total of 13.76 g of [C 5 -Gun]Cl was obtained after 12 h, representing an overall yield of approximately 83%. These GILs were characterized by 1 H NMR with DMSO-d 6 as a solvent, and the spectra are shown in Figure S1. 1 Phase Diagrams.…”