Investigation of gold leaching from urban mineral resources via ultrasonic enhancement of thiocyanate-hydrogen peroxide system
Year: 2025
Type: article
Abstract: Thiocyanate (SCN - ) serves as a viable substitute for cyanide in gold extraction, exhibiting toxicity that is 1000 times lower than that of cyanide. This study investigates a rapid ultrasonic-enhanced leaching technique for gold leaching via thiocyanate and hydrogen peroxide system. The leaching behaviors of gold in the thiocyanate solution under various conditions were also evaluated. The results indicated that the redox potential fluctuates between 0.53 to 0.74 V, with a pH value below 4.9, and the SCN - concentration varies from 0.08 to 0.38 mol/L, the hydrogen peroxide volume exceeds 0.75 mL, the temperature is maintained at 40 ℃, and solid–liquid ratio of 200/25 tablets /mL. Consequently, 94.65 % of gold was leached and the gold complex present in the system are Au ( S C N ) 2 - and Au ( S C N ) 4 - . The results presented in this paper establishes a theoretical foundation for the extraction of gold by the thiocyanate method and promoted the development of thiocyanate technology.
Authors: Yan Lu, Jianbo Wang, Zizhen He
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,060
Award: G8160929207
OpenAlex ID: W4409524447