Removal of As(V) and simultaneous production of copper powder from a Cu(II)-As(V)-H2SO4 electrolyte by using reactive electrodialysis
DOI:
https://doi.org/10.3989/revmetalm.1126Keywords:
Arsenic removal, Reactive electrodialysis, Ion exchange membranes, Ácidic electrolytes, Copper poderAbstract
The removal of As(V) and the simultaneous generation of powder of copper from an electrolyte made of As(V) - Cu(II) - H2SO4 was studied by using electro dialysis at several current densities, temperatures and aeration of the electrolyte. The removal of arsenic was proportional to the current density, temperature and aeration used. The removal of arsenic reached a value of 0.14 mmol/h at 500 A/m2, 25 °C and without aeration, this value increased to 0.31 mmol/h by increasing the aeration to 6.6 l/h. The Cu(II) was recovered in a 98 % as a fine arsenic free powder of metallic copper with oxides of copper. The arsenic was removed from the electrolyte by adsorption onto the anodic slimes generated from the lead anode oxidation.
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