C. Polatides, M. Dortsiou
The electrochemical removal of nitrate from aqueous solutions presents a significant challenge due to the generation of more toxic side products than nitrates during conventional constant potential electrolysis, specifically NO2− and NH3. This study investigates the effectiveness of square, sinusoidal, and triangular wave pulsing potential electrolysis in the removal of nitrate ions. The experimental results on a Cu60Zn40 electrode reveal that square asymmetric pulses at a frequency of 50 Hz and duration distribution of 80% cathodic and 20% anodic limits significantly enhance nitrate removal efficiency compared to sinusoidal and triangular forms. Moreover, the minimum selectivity for both nitrite and ammonia occurred within the frequency range of 30–50 Hz. At frequencies exceeding 200 Hz, a decrease in nitrate removal efficiency was observed, attributed to ions being unable to follow rapid potential fluctuations, thereby limiting Faradaic reaction rates. The application of square pulses with a constant cathodic limit of -1.7 V and varying anodic limits unearthed a minimum selectivity for nitrite and ammonia at 1.50 V, linked to surface oxide interactions of brass that facilitate the oxidation of these byproducts. This work underscores the potential of pulsed electrolysis in effective nitrate removal, providing insights essential for enhancing water treatment processes.
@article{10acefb7-1744-4bef-ab4b-b3405c169d05,
title={Electrochemical removal of nitrate ion from aqueous solution by pulsing potential electrolysis},
author={C. Polatides and M. Dortsiou},
year={2005},
language={en}
}TY - JOUR TI - Electrochemical removal of nitrate ion from aqueous solution by pulsing potential electrolysis AU - C. Polatides AU - M. Dortsiou PY - 2005 LA - en ER -
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