Caracterización de los compuestos químicos obtenidos al emplear ácido acético como agente lixiviante en el tratamiento hidrometalúrgico de pilas Ni-MH desechadas
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Date
2018
Journal Title
Journal ISSN
Volume Title
Publisher
Corporación Universitaria Lasallista
Abstract
Introduction. Nickel-Metal Hydride (Ni-MH)
batteries usually end up in municipal landfills after
their useful life, which may release Ni, a potential
toxic element, and rare earth elements which can
react with water and release hydrogen.Objective.
Recover the metals (Ni, Co y La) contained in the
electrode material of spent Ni-MH batteries, as
organic salts, using vinegar as a leaching agent in a hydrometallurgical treatment. Materials and
methods. Electrodes from a sample of spent
Ni-MH batteries were leached separately with a 5%
v/v acetic acid solution (commercial vinegar). The
pregnant liquor was subjected to an
evaporation/crystallization process at 70°C for 24
h. The products were characterized by the
following techniques: atomic spectroscopy (AS),
scanning electron microscopy (SEM) with energy
dispersive spectroscopy (EDS), X-ray diffraction
(XRD) and Fourier transform infrared spectroscopy
(FTIR). Results. It is possible to recover 40% of
the Ni from anodic material and about 45% of Ni
from the cathodic material. Nickel, cobalt and
lanthanum acetates were detected in the anodic
product; and nickel, cobalt and potassium acetates
were detected in the cathodic product.
Conclusion. Because these salts are typically
used in the ceramics, textile and agricultural
industries, the proposed hydrometallurgical
treatment could be used for the valorization of the
electrode material from spent Ni-MH batteries.
Description
Keywords
Corporación Universitaria Lasallista, Área Metropolitana del Valle de Aburrá, Hidrometalurgia, Reciclaje de baterías, Baterías níquel, Compuestos químicos
Citation
Revista Producción + Limpia Vol. 13 N. 1