Simultaneous removal of nitrate and its intermediates by use of bipolar electrochemistry
作者： Mahdi Safari , Abbas Rezaee , Bita Ayati , Ahmad Jonidi-Jafari
DOI: 10.1007/S11164-013-1279-9
关键词: Catalysis 、 Supporting electrolyte 、 Ammonia 、 Nitrite 、 Chemistry 、 Inorganic chemistry 、 Nitrate 、 Electrode 、 Electrochemistry 、 Denitrification 、 General chemistry
摘要: Electrochemical removal of nitrate and its intermediates, ammonia nitrite, by use a bipolar electrode connection, was investigated under different experimental conditions (initial pH (4, 7, or 10) current density (5, 10, 15 mA/cm2), concentration (25, 50, 75 mg/L NO3 −-N), with without NaCl as supporting electrolyte). The results showed that intermediates were significantly removed in the presence electrolyte; nitrite not absence NaCl. Nitrate reduced from 50 to 8.65 mg/L −-N 150 min; these final concentrations 3.36 mg/L NH3 0.01 mg/L NO2 −-N, respectively. Denitrification times required reduce recommended standard for drinking water 10 mg/L 180, 120, 60 min at densities 5, 15 mA/cm2, respectively; initial is −-N. rate reduction pH 7 10 greater than pH 4. With increasing time achieve increased.
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