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

Borda, Johana ; González, Claudia ; Torres, Robinson

Ingeniería e investigación, 2023-01, Vol.43 (1), p.e95364-e95364 [Periódico revisado por pares]

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Título:
Aqueous Recovery of Zinc and Lead from Coal Fly Ashes of a Colombian Thermoelectric Plant
Autor: Borda, Johana ; González, Claudia ; Torres, Robinson
Assuntos: ash ; cenizas volantes ; citrate ; citrato de sodio ; Fly ; fly-ash ; HNO3 ; leaching ; lead ; lixiviación ; plomo ; sodium ; sodium-citrate ; zinc
É parte de: Ingeniería e investigación, 2023-01, Vol.43 (1), p.e95364-e95364
Descrição: 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.
Editor: Universidad Nacional de Colombia
Idioma: Inglês

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