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Electrochemical Destruction of Cyanide Ions and Recovery of Zinc Ions from Electroplating Wastewater
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2000, v.13 no.6, pp.699-704
Niu,
L., Ro,
B., Jung,
C., &
Lee,
Y.
(2000). Electrochemical Destruction of Cyanide Ions and Recovery of Zinc Ions from Electroplating Wastewater. Analytical Science and Technology, 13(6), 699-704.
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Abstract
A study has been made for the electrochemical destruction of cyanide ions and removal of zinc ions from a simulated electroplating wastewater by the use of a platinum platized-titanium anode and a stainless steel cathode. Several experimental parameters, including electrolysis time, cell current, additives, and chloride concentration, have been investigated and used for efficient destruction of cyanide waste and removal of zinc ions from aqueous solutions. It was found that cell current and type of additives gave great effects on the destruction of cyanide ions and removal of zinc ions. The optimized conditions (electrolysis time: 1hr, current: 12A, additive: 0.5 M NaCl) have been defined to destroy cyanide ions and remove zinc ions with high efficiency and low operation cost. The proper reaction mechanism leading to the destruction of cyanide on the anode has also been discussed.
- keywords
- cyanide ion, zinc cyanide complex ion, electroplating wastewater, electrochemical destruction
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