Efficient Electrochemical Reduction of High Concentration Nitrate by a Stepwise Method View Full Text


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Article Info

DATE

2019-02-22

AUTHORS

Lian-Kui Wu, Yi-Jie Shi, Cheng Su, Hua-Zhen Cao, Guo-Qu Zheng

ABSTRACT

A combined anode, Ti/IrO2 (0–3.5 h)–Ti/RuO2 (3.5–7 h) is designed to promote the removal of high concentration of nitrate by a stepwise method. During the electrolysis process, Ti/IrO2 is used as anode at the first stage to promote the generation of ammonia-N and then Ti/RuO2 is switched as anode at the next stage to enhance the chlorine evolution. The generated Cl2 will further react with H2O to produce ClO−, which will oxidize ammonia-N to N2, therefore improve the nitrate removal efficiency. Results shown that both of the reduction of nitrate and oxidation of the by-product of ammonia-N are enhanced and the total nitrogen removal efficiency is 85% when the initial nitrate concentration is 500 mg L−1. The avoid using cation exchange membrane not only efficiently reduces the operation cost but also simplifies the operation and maintain procedure.Graphical Abstract More... »

PAGES

1216-1223

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10562-019-02715-9

DOI

http://dx.doi.org/10.1007/s10562-019-02715-9

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1112305352


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