Electric conversion treatment of cobalt-containing wastewater

Long-term accumulation of cobalt-containing wastewater may also pollute groundwater and cause a large amount of loss of valuable metals. Therefore, the comprehensive utilization of cobalt-containing wastewater must be realized, especially as cobalt itself is a very important strategic resource. This...

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Bibliographic Details
Published in:Water science and technology 2021-04, Vol.83 (8), p.1973-1986
Main Authors: Lin, Shengnan, Pan, Xijuan, Meng, Deliang, Zhang, Tingan
Format: Article
Language:English
Subjects:
Chemical precipitation
co(oh)2
co3o4
Cobalt
Cobalt oxides
Current density
Current efficiency
Economics
Efficiency
Electrodes
Electrolysis
Electrolytes
Expected values
Experiments
Factories
Groundwater
Heavy metals
Hydroxides
Ions
membrane electrolysis
Membrane separation
Metals
Methods
Oxides
Production capacity
Productivity
Quality standards
Roasting
Waste Water
Wastewater
Wastewater treatment
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Summary:Long-term accumulation of cobalt-containing wastewater may also pollute groundwater and cause a large amount of loss of valuable metals. Therefore, the comprehensive utilization of cobalt-containing wastewater must be realized, especially as cobalt itself is a very important strategic resource. This paper proposes a membrane electroconversion method to separate cobalt ions from cobalt-containing wastewater and prepare cobalt hydroxide. In addition, the electrolysis process was optimized, and single-factor experiments such as the initial concentration, cobalt ions, current density, temperature etc., and economic calculations such as current efficiency were explored. The electrolysis product was calcined as the precursor to obtain the oxide Co O , and the calcination experiment was also optimized. In this concentration range, more than 90% of cobalt can be recovered within 2 h.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2021.101