Title :
Study on Nitrate-N Removal by a Catalytic Electrolysis Method in Water
Author :
Shufan, Ye ; Yang, Zhang ; Xiaomin, Hu ; Yingdian, He
Author_Institution :
Coll. of Resource & Civil Eng., Northeastern Univ., Shenyang, China
Abstract :
A new method for Nitrate-N removal in water has been presented in this paper, and related experiments have been carried out to study its technical characteristics. Results showed that in designed electrolysis system, Fe modified Ti substrate cathode can catalytic reduce NO3--N to NH4+-N under suitable conditions. Furthermore NH4+-N can be oxidized to N2-N in same system by supporting of Cl-. Under the conditions of Cl- addition quantity of 500mg/L, current density of 12 mA/cm2, plate distance of 9mm, stirring intensity of 450rpm, and electrolysis time of 150min, about 94.3% NO3--N and 94.1% TN can be removed, even no NO2--N or NH4+-N is produced. Moreover mechanism has been analyzed based on bimetal catalytic reduction and obtained results. The adsorption effect of Fe to O and reductant attacking may be considered as the major cause of NO3--N reduction. And chlorine oxidation may be the reason of NH4+-N harmlessly removing.
Keywords :
adsorption; catalysis; chemical technology; current density; electrolysis; nitrogen compounds; oxidation; reduction (chemical); water; water treatment; adsorption effect; bimetal catalytic reduction; catalytic electrolysis method; chlorine oxidation; current density; electrolysis system; nitrate-N removal; plate distance; reductant attacking; stirring intensity; technical characteristics; water; ammonia; catalytic reduction; chlorine oxidation; electrolysis; nitrate;
Conference_Titel :
Digital Manufacturing and Automation (ICDMA), 2010 International Conference on
Conference_Location :
ChangSha
Print_ISBN :
978-0-7695-4286-7
DOI :
10.1109/ICDMA.2010.349
