Metal separation from mixed types of batteries using selective precipitation and liquid–liquid extraction techniques

The purpose of this paper is to study metal separation from a sample composed of a mixture of the main types of spent household batteries, using a hydrometallurgical route, comparing selective precipitation and liquid–liquid extraction separation techniques. The preparation of the solution consisted...

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Bibliographic Details
Published in:Waste management (Elmsford) 2011, Vol.31 (1), p.59-64
Main Authors: Provazi, Kellie, Campos, Beatriz Amaral, Espinosa, Denise Crocce Romano, Tenório, Jorge Alberto Soares
Format: Article
Language:English
Subjects:
Acid leaching
Applied sciences
Batteries
Cadmium
Chemical Precipitation
chromium
cobalt
Cobalt - chemistry
Cobalt - isolation & purification
Electric batteries
Electric Power Supplies
Electronic Waste
Exact sciences and technology
grinding
iron
lanthanum
leaching
Liquid-liquid extraction
Lithium - chemistry
manganese
Metals - chemistry
Metals - isolation & purification
nickel
Other wastes and particular components of wastes
Phosphinic Acids - chemistry
phosphoric acid
Pollution
Precipitation
Refuse Disposal - methods
Separation
sodium hydroxide
Sodium Hydroxide - chemistry
waste management
Wastes
zinc
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Summary:The purpose of this paper is to study metal separation from a sample composed of a mixture of the main types of spent household batteries, using a hydrometallurgical route, comparing selective precipitation and liquid–liquid extraction separation techniques. The preparation of the solution consisted of: grinding the waste of mixed batteries, reduction and volatile metals elimination using electric furnace and acid leaching. From this solution two different routes were studied: selective precipitation with sodium hydroxide and liquid–liquid extraction using Cyanex 272 [bis(2,4,4-trimethylpentyl) phosphoric acid] as extracting agent. The best results were obtained from liquid–liquid extraction in which Zn had a 99% extraction rate at pH 2.5. More than 95% Fe was extracted at pH 7.0, the same pH at which more than 90% Ce was extracted. About 88% Mn, Cr and Co was extracted at this pH. At pH 3.0, more than 85% Ni was extracted, and at pH 3.5 more than 80% of Cd and La was extracted.
ISSN:0956-053X
1879-2456
DOI:10.1016/j.wasman.2010.08.021