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Durability testing for the recovery of sodium hydroxide from alkaline waste solutions

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Abstract

Testing successfully demonstrated the operation of an electrochemical flow cell for more than 1000 h to recover 13–14 wt% sodium hydroxide from an alkaline waste solution. The nickel cathode, platinized-titanium anode and cationic membrane exhibited no visible signs of attack upon inspection after testing. The membrane experienced a slow, but steady decline in current efficiency, from a high of greater than 95% down to approximately 90% after 1079 h. We attribute the loss in current efficiency to the accumulation of silicon and aluminium within the membrane structure.

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Authors and Affiliations

  1. Electrosynthesis Company, Inc., Lancaster, NY, 14086, USA

    J.D. Genders & D. Chai

  2. Savannah River Technology Center, Westinghouse Savannah River Company, Aiken, SC, 29808, USA

    D.T. Hobbs

Authors
  1. J.D. Genders
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  2. D. Chai
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  3. D.T. Hobbs
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Genders, J., Chai, D. & Hobbs, D. Durability testing for the recovery of sodium hydroxide from alkaline waste solutions. Journal of Applied Electrochemistry 30, 13–19 (2000). https://doi.org/10.1023/A:1003899914793

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