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

被引：3
|
作者：
Borda, Johana [1 ]
Gonzalez, Claudia [2 ]
Torres, Robinson [3 ]
机构：
[1] Univ Pedag & Tecnol Colombia, Fac Ingn, Escuela Ingn Met, Met & Ciencia Mat, Tunja, Colombia
[2] Univ Pedag & Tecnol Colombia, Fac Ingn, Escuela Ingn Met, Ingn Met, Tunja, Colombia
[3] Univ Pedag & Tecnol Colombia, Fac Ingn, Escuela Ingn Met, Tunja, Colombia
来源：
INGENIERIA E INVESTIGACION | 2023年 / 43卷 / 01期
关键词：
fly ash; leaching; HNO3; sodium citrate; zinc; lead; POWER-PLANTS; MANAGEMENT; MECHANISM; EXPANSION; RESIDUES; ELEMENTS; ZEOLITE; FUSION;
D O I：
10.15446/ing.investig.95364
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
引用
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页数：8
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