DOI: https://doi.org/10.55373/mjchem.v27i2.1

Keywords: Gold; cyanide; Sandioss; leaching agent; pH

Abstract

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 µm, 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.