Abstract

Using the electrodialysis in treatment of rinsewater, two other solutions are obtained: one concentrated, which can be returned to the galvanic bath; and the other diluted, which has perfect conditions to be reused in a closed circuit as rinsewater. The aim of this work was to evaluate the competitiveness between metallic ions (iron, niquel and zinc) during the electrodialysis technique as a method for treatment of wastewater produced by the phosphatization process. Experiments were conduced with different rinsewater composition and Nafion® 450 and Selemion® AMP membranes. The results obtained show correlation between percentual extractions, current efficiency and the presence of metallic ions in solution.

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