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- Title
Gold recovery in aqueous medium by cassava peels (Manihot esculenta) modified with citric acid.
- Authors
DE-LA-PAVA, ROSA; GÓMEZ-GARCÍA, MARÍA C.; ALBIS, ALBERTO R.
- Abstract
Cassava peels were modified with citric acid by reacting the dried and milled peels with an aqueous solution of citric acid at 60 °C and sulfuric acid as catalysts, and subsequent heating at 150 °C for completion of the reaction. The synthetic solutions were preparing taking 0,5 g of metallic gold and dissolving it in a solution of 8 ml of HNO3 0,1 M; volume was completed until a solution of concentration in gold of 500 mg/L was reached. The influence of variables such as the initial gold concentration, temperature, and pH of the samples were analyzed in order to determine the optimum conditions in the recovery process. Experiments were carried out in Erlenmeyers in batch mode using an orbital shaker. The activation energy of the adsorption process was calculated as 157 + 14 kJ/mol. Gold removal values were found up to 99,58%, at a temperature of 45 ° C and pH of 10, these being optimal conditions.
- Subjects
CITRIC acid; GOLD mining; CHEMICAL peel; GOLD; ACID catalysts; SULFURIC acid; ACTIVATION energy; CASSAVA; FRUIT skins
- Publication
Revista EIA, 2023, Vol 20, Issue 39, p1
- ISSN
1794-1237
- Publication type
Article
- DOI
10.24050/reia.v20i39.1612