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http://dx.doi.org/10.12925/jkocs.2017.34.2.217

A Study on the Removal of Nitrate Nitrogen by Redox Reaction of Zinc in Acidic Atmosphere  

Lee, Soo Jeong (Department of Chemical Engineering, Changwon National University)
Kim, Jong Hwa (Department of Chemical Engineering, Changwon National University)
Song, Ju Yeong (Department of Chemical Engineering, Changwon National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.34, no.2, 2017 , pp. 217-224 More about this Journal
Abstract
This is a study on the removal of nitrate nitrogen from wastewater by oxidation and reduction reaction of zinc in an acidic atmosphere. The optimum removal rate of nitrate nitrogen and the optimum pH were studied by controlling the amount of zinc and sulfamic acid. The oxidation efficiency was higher at pH 2.0 in the range of pH 2.0 ~ 4.0 because the reaction occurred more strongly in strong acidic atmosphere. It is advantageous to reduce the nitrate ion to the final nitrogen gas by adding the sulfamic acid to the sulfurous acid because it consumes less $H^+$ ion than when the sulfamic acid is not present. According to the same amount of zinc, nitrate nitrogen was removed by 46.0% while sulfamic acid was not added, whereas nitrite nitrogen was removed by 93.0% by adding sulfamic acid. In addition, In this experiment, zinc was prepared in powder form and its reactivity was larger than that of other common zinc metal, so the removal efficiency was very high, about 80.0%, within one minute after the reaction.
Keywords
Nitrate nitrogen; Ammonia; Oxidation and reduction reaction; Zinc; Sulfamic acid;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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