Sandioss as an Eco-Friendly Leaching Agent for Refractory Gold Ore Extraction

This study investigated the extraction of gold from a raw sample sourced from Gua Musang, Kelantan using an eco-friendly leaching agent, Sandioss, as a cyanide substitute.The research focused on the impact of various factors, including Sandioss dosage, leaching time, liquid-solid ratio, pH, and particle size on Au recovery.Results demonstrate that under optimal conditions, specifically Sandioss dosage of 900 ppm, solid-liquid ratio of 30%, pH of 12, particle size of less than 75 m, and leaching time of 72 hours, the gold concentration increased significantly from 3.112 ppm to 9.716 ppm.Sandioss, a novel eco-friendly gold leaching agent, offers numerous advantages over traditional methods like cyanide leaching, including environmental sustainability, versatility, cost-effectiveness, and safety.For further application, Sandioss can be used to recover Au from electronic waste.