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

Volume

2

fYear

2010

fDate

18-20 Dec. 2010

Firstpage

514

Lastpage

517

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Digital Manufacturing and Automation (ICDMA), 2010 International Conference on

Conference_Location

ChangSha

Print_ISBN

978-0-7695-4286-7

Type

conf

DOI

10.1109/ICDMA.2010.349

Filename

5701458