Artículo

Prediction, modeling, and optimization studies of eco-friendly gold extraction using alpha-cyclodextrin and the RSM and CCD methods

Muanda, Meschack Mukunga; Omalanga, Pele Pascal Daniel; Mitonga, Vanessa Mwambaie; Ilunga, Michée Ngoy

Instituto de Ciencias de la Atmósfera y Cambio Climático, UNAM, publicado en Revista Internacional de Contaminación Ambiental y cosechado de y cosechado de Revistas UNAM

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Procedencia del contenido

Cita

Muanda, Meschack Mukunga, et al. (2024). Prediction, modeling, and optimization studies of eco-friendly gold extraction using alpha-cyclodextrin and the RSM and CCD methods. Revista Internacional de Contaminación Ambiental; Vol. 40, 2024; 653-668. Recuperado de https://repositorio.unam.mx/contenidos/4161077

Descripción del recurso

Autor(es)
Muanda, Meschack Mukunga; Omalanga, Pele Pascal Daniel; Mitonga, Vanessa Mwambaie; Ilunga, Michée Ngoy
Tipo
Artículo de Investigación
Área del conocimiento
Biología y Química
Título
Prediction, modeling, and optimization studies of eco-friendly gold extraction using alpha-cyclodextrin and the RSM and CCD methods
Fecha
2024-11-21
Resumen
In the Democratic Republic of the Congo, gold extraction from ore in South Kivu utilized alpha-cyclodextrin (α-CD) as an eco-friendly method to replace harmful methods. Analysis of variance and response surface methodology were employed for prediction, modeling, and optimization studies. Atomic absorption spectroscopy revealed a 0.06% gold content in a randomly taken ore sample. Leaching with modified aqua regia was optimized with the following parameters: 7.27 h, 50 g/L HBr concentration, pH 1, and 200 rpm stirring speed, resulting in 98.5% removal. Neutralization tests with potassium hydroxide (KOH) followed leaching to prepare the solution medium with appropriate pH for extraction test, by varying parameters such as time, KOH concentration, and pH. Following neutralization, extraction tests with α-CD were carried out and optimized with the following parameters: 40 min, α-CD concentration of 11.6166 g/L, and a pH of 5, resulting in a percent removal of 98.9%. α-CD’s eco-friendly nature, cost-effectiveness, and high percent removal make it a promising and sustainable alternative for gold recovery, appealing to the mining industry.
Tema
ANOVA; metal valioso; agua regia modificada; optimización; solución ambiental; ANOVA; valuable metal; modified aqua regia; optimization; environmental solution
Idioma
spa
ISSN
ISSN impreso: 0188-4999

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