Gabriela Figueroa, Jesus L. Valenzuela
Over the past decade, the concern about toxic metals in freshwater has increased, leading to the implementation of environmental laws that require industries producing metal-containing wastewater to treat their discharges. This study aimed to investigate a novel method for minimizing heavy metals in mining industry wastewater by utilizing an innovative electrochemical treatment technique known as electrocoagulation (EC) combined with sulfide precipitation, which does not necessitate chemical additions. The research focused on recovering gold and silver from pregnant solutions generated during the cyanidation process using EC technology with iron electrodes, presenting a developed alternative to the traditional Merril-Crowe process. The findings revealed that the average concentrations of gold and silver in the pregnant solution were 4.27 and 283 ppm, respectively. The recovery rates achieved were 92% for gold and 95% for silver under optimal conditions of pH 10, a residence time of 20 minutes, and a sodium chloride addition of 4 g/L. Additionally, the precipitation process efficiently eliminated lead, zinc, copper, and iron ions from barren solutions, demonstrating the potential efficacy of this technique for heavy metal removal.
@article{07cb6706-bd59-466f-93ff-435b93738a0e,
title={Recovery of Gold and Silver and Removal of Copper, Zinc and Lead Ions in Pregnant and Barren Cyanide Solutions},
author={Gabriela Figueroa and Jesus L. Valenzuela},
year={2015},
language={en}
}TY - JOUR TI - Recovery of Gold and Silver and Removal of Copper, Zinc and Lead Ions in Pregnant and Barren Cyanide Solutions AU - Gabriela Figueroa AU - Jesus L. Valenzuela PY - 2015 LA - en ER -
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