Removal of thiocyanates and heavy metal ions from simulated wastewater solutions by electro- and peroxyelectrocoagulation

Removal of thiocyanates and heavy metal ions from simulated wastewater solutions by electro- and... A procedure for treatment of simulated wastewater solutions to remove Cu2+, Ni2+, and SCN− ions using various combinations of aluminum and iron electrodes in the electro- and peroxyelectrocoagulation processes was studied. The influence exerted by the current density, pH of solution, and concentrations of impurities and hydrogen peroxide on the efficiency of removal of these ions was analyzed. Electrocoagulation using aluminum anode does not lead to a significant decrease in the thiocyanate concentration. In the peroxyelectrocoagulation process, the efficiency of removal of SCN− ions increases with an increase in the [H2O2]: [SCN−] ratio. The electrocoagulation efficiency with the Fe/Fe electrode pair reaches 87% for SCN− and 99.5% for Cu2+ and Ni2+ at a current density of 20 mA cm–2 and electrolysis time of 20 min. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Applied Chemistry Springer Journals

Removal of thiocyanates and heavy metal ions from simulated wastewater solutions by electro- and peroxyelectrocoagulation

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Publisher
Pleiades Publishing
Copyright
Copyright © 2016 by Pleiades Publishing, Ltd.
Subject
Chemistry; Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering
ISSN
1070-4272
eISSN
1608-3296
D.O.I.
10.1134/S1070427216090093
Publisher site
See Article on Publisher Site

Abstract

A procedure for treatment of simulated wastewater solutions to remove Cu2+, Ni2+, and SCN− ions using various combinations of aluminum and iron electrodes in the electro- and peroxyelectrocoagulation processes was studied. The influence exerted by the current density, pH of solution, and concentrations of impurities and hydrogen peroxide on the efficiency of removal of these ions was analyzed. Electrocoagulation using aluminum anode does not lead to a significant decrease in the thiocyanate concentration. In the peroxyelectrocoagulation process, the efficiency of removal of SCN− ions increases with an increase in the [H2O2]: [SCN−] ratio. The electrocoagulation efficiency with the Fe/Fe electrode pair reaches 87% for SCN− and 99.5% for Cu2+ and Ni2+ at a current density of 20 mA cm–2 and electrolysis time of 20 min.

Journal

Russian Journal of Applied ChemistrySpringer Journals

Published: Jan 3, 2017

References

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