Journal
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
Volume 32, Issue 4, Pages 831-836Publisher
BRAZILIAN SOC CHEMICAL ENG
DOI: 10.1590/0104-6632.20150324s00003511
Keywords
Electrodialysis; Current-voltage curve; Limiting current density; Effluent treatment; HEDP
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Funding
- Laboratory of Corrosion, Protection and Recycling of Materials, of the Federal University of Rio Grande do Sul
- Laboratory of Recycling, Waste Treatment and Extractive Metallurgy, of the University of Sao Paulo
- CAPES
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Membrane separation techniques have been explored for treating industrial effluents to allow water reuse and component recovery. In an electrodialysis system, concentration polarization causes undesirable alterations in the ionic transportation mechanism. The graphic construction of the current voltage curve is proposed for establishing the value of the limiting current density applied to the cell. The aim of this work was to determine the limiting current density in an electrodialysis bench stack, the function of which was the treatment of an electroplating effluent containing HEDP. For this, a system with five compartments was used with a working solution simulating the rinse waters of HEDP-based baths. The results demonstrated correlation between the regions defined by theory and the experimental data.
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