Published

2023-01-22

Aqueous Recovery of Zinc and Lead from Coal Fly Ashes of a Colombian Thermoelectric Plant

Recuperación acuosa de zinc y plomo a partir de cenizas volantes de carbón de una planta termoeléctrica colombiana

DOI:

https://doi.org/10.15446/ing.investig.95364

Keywords:

Fly-ash, leaching, HNO3, sodium-citrate, zinc, lead (en)
cenizas volantes, lixiviación, HNO3, citrato de sodio, zinc, plomo (es)

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A hydrometallurgical treatment under ambient conditions was proposed in order to eliminate and recover the lead and zinc contained in a sample of thermal coal fly ash used to produce energy. By using leaching solutions with conventional inorganic acids (HCl, HNO3, and H2SO4), ferric chloride, and sodium citrate, more than 90% zinc and approximately 40% lead were obtained. The most favorable leaching conditions were set at 0,5 M, with a pH value of 8 for citrate. Two leaching stages were necessary to optimize metal recovery: the first with nitric acid for zinc extraction and the second one with citrate for the lead. The sulfur phases of the metals limited a complete metal extraction.

Se propuso un tratamiento hidrometalúrgico en condiciones ambientales para eliminar y recuperar el plomo y zinc contenidos en una muestra de cenizas volantes de carbón térmico que se utiliza para producir energía. Mediante el uso de soluciones de lixiviación con ácidos inorgánicos convencionales (HCl, HNO3 y H2SO4), cloruro férrico y citrato de sodio, se obtuvo más del 90 % de zinc y aproximadamente el 40 % de plomo. Las condiciones de lixiviación más favorables se establecieron en 0,5 M y un valor pH de 8 para el citrato. Fueron necesarias dos etapas de lixiviación para optimizar la recuperación de metales: la primera con ácido nítrico para la extracción de zinc y la segunda con citrato para el plomo. Las fases de azufre de los metales limitaron una completa extracción de metales.

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How to Cite

APA

Borda, J., González, C. & Torres, R. (2022). Aqueous Recovery of Zinc and Lead from Coal Fly Ashes of a Colombian Thermoelectric Plant. Ingeniería e Investigación, 43(1), e95364. https://doi.org/10.15446/ing.investig.95364

ACM

[1]
Borda, J., González, C. and Torres, R. 2022. Aqueous Recovery of Zinc and Lead from Coal Fly Ashes of a Colombian Thermoelectric Plant. Ingeniería e Investigación. 43, 1 (Nov. 2022), e95364. DOI:https://doi.org/10.15446/ing.investig.95364.

ACS

(1)
Borda, J.; González, C.; Torres, R. Aqueous Recovery of Zinc and Lead from Coal Fly Ashes of a Colombian Thermoelectric Plant. Ing. Inv. 2022, 43, e95364.

ABNT

BORDA, J.; GONZÁLEZ, C.; TORRES, R. Aqueous Recovery of Zinc and Lead from Coal Fly Ashes of a Colombian Thermoelectric Plant. Ingeniería e Investigación, [S. l.], v. 43, n. 1, p. e95364, 2022. DOI: 10.15446/ing.investig.95364. Disponível em: https://revistas.unal.edu.co/index.php/ingeinv/article/view/95364. Acesso em: 22 mar. 2026.

Chicago

Borda, Johana, Claudia González, and Robinson Torres. 2022. “Aqueous Recovery of Zinc and Lead from Coal Fly Ashes of a Colombian Thermoelectric Plant”. Ingeniería E Investigación 43 (1):e95364. https://doi.org/10.15446/ing.investig.95364.

Harvard

Borda, J., González, C. and Torres, R. (2022) “Aqueous Recovery of Zinc and Lead from Coal Fly Ashes of a Colombian Thermoelectric Plant”, Ingeniería e Investigación, 43(1), p. e95364. doi: 10.15446/ing.investig.95364.

IEEE

[1]
J. Borda, C. González, and R. Torres, “Aqueous Recovery of Zinc and Lead from Coal Fly Ashes of a Colombian Thermoelectric Plant”, Ing. Inv., vol. 43, no. 1, p. e95364, Nov. 2022.

MLA

Borda, J., C. González, and R. Torres. “Aqueous Recovery of Zinc and Lead from Coal Fly Ashes of a Colombian Thermoelectric Plant”. Ingeniería e Investigación, vol. 43, no. 1, Nov. 2022, p. e95364, doi:10.15446/ing.investig.95364.

Turabian

Borda, Johana, Claudia González, and Robinson Torres. “Aqueous Recovery of Zinc and Lead from Coal Fly Ashes of a Colombian Thermoelectric Plant”. Ingeniería e Investigación 43, no. 1 (November 1, 2022): e95364. Accessed March 22, 2026. https://revistas.unal.edu.co/index.php/ingeinv/article/view/95364.

Vancouver

1.
Borda J, González C, Torres R. Aqueous Recovery of Zinc and Lead from Coal Fly Ashes of a Colombian Thermoelectric Plant. Ing. Inv. [Internet]. 2022 Nov. 1 [cited 2026 Mar. 22];43(1):e95364. Available from: https://revistas.unal.edu.co/index.php/ingeinv/article/view/95364

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CrossRef citations3

1. J. Borda, I.D. Salamanca, R. Torres. (2024). Effect of oxidizing agents on the treatment of a Colombian lead ore by alternative hydrometallurgical processes. Journal of Mining and Metallurgy, Section B: Metallurgy, 60(1), p.117. https://doi.org/10.2298/JMMB230926010S.

2. Johana Borda, Robinson Torres. (2023). Effect of pretreatments to improve nickel leaching from laterites in carboxylic media: Mechanism and kinetic model. South African Journal of Chemical Engineering, 46, p.12. https://doi.org/10.1016/j.sajce.2023.07.001.

3. Adriana Vargas, Johana Borda, Robinson Torres. (2023). Aqueous Pretreatment Effect to Improve Au, Ag, and Pt Recovery from Spent Automotive Catalysts. Revista Científica, 47(2), p.116. https://doi.org/10.14483/23448350.20875.

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