Regeneration of hexavalent chromium using a Bi-doped PbO2 anode |
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| Authors: | K Mondal NV Mandich SB Lalvani |
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| Affiliation: | (1) Department of Mechanical Engineering and Energy Processes, Southern Illinois University at Carbondale, Carbondale, IL 62901, USA;(2) HBM Electrochemical and Engineering Co., Lansing, IL, USA |
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| Abstract: | The rate of hexavalent chromium regeneration from trivalent chromium, present as an impurity in a chromium plating solution at the Bi-doped PbO2 anode, is found to be approximately four times greater than the corresponding rate observed for a PbO2 coated lead (anodized lead) anode. A mathematical model that takes into account species electromigration and associated mass transfer effects was developed and tested. Dynamic concentration data for various chromium species were used along with the mathematical model to evaluate the various rate parameters. |
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| Keywords: | ceramic membrane chromium electromigration electrooxidation lead anode |
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