Artículos de revistas
Study of a pilot plant for the recovery of metals from spent alkaline and zinc-carbon batteries with biological sulphuric acid and polithionates production.
Fecha
2014-04Registro en:
Thomas, Horacio Jorge; Falco, Maria Lorena Romina; Di Nanno, Maria Pia; Martinez, Analia Beatriz Luján; Curutchet, Gustavo Andres; Study of a pilot plant for the recovery of metals from spent alkaline and zinc-carbon batteries with biological sulphuric acid and polithionates production.; Planta Piloto de Ingeniería Química; Latin American Applied Research; 44; 2; 4-2014; 123-129
0327-0793
1851-8796
Autor
Thomas, Horacio Jorge
Falco, Maria Lorena Romina
Di Nanno, Maria Pia
Martinez, Analia Beatriz Luján
Curutchet, Gustavo Andres
Resumen
The recovery of Zn and Mn from spent alkaline and Zn-C batteries with a biohydro-metallurgycal process was studied in a pilot plant that consists in an air lift bio-reactor with a sulfur packed bed where Acidithiobacillus thiooxidans produces an acid-reducing medium; a leaching reactor where the acid-reducing medium is mixed with the battery powder and a recovery reactor where metals are recovered from the leaching liquor by electroly-sis. Results shows that with a 350 mM in proton me-dium produced in 12 days by Acidithiobacillus thiooxidans in the bio-reactor, an extraction of the 100% of Zn and 67% of the Mn present in the bat-tery powder was reached. The presence of polithionates in the medium produced in the bio-reactor allows the dissolution of the manganese. The solid remaining after bioleaching is a manganese oxide. The electrolysis of the leaching liquor pro-duced a cathodic deposit of metallic Zn and an an-odic deposit of a high surphase manganese oxide in one step at room temperature.