化学
硝酸盐
反硝化
电解质
电极
阳极
无机化学
阴极
电催化剂
电化学
核化学
氮气
有机化学
物理化学
作者
Weichun Gao,Lulu Gao,Dan Li,Kaituo Huang,Li Cui,Jing Meng,Jiyan Liang
标识
DOI:10.1016/j.jelechem.2018.04.006
摘要
The Cu-Bi cathode was a new type of electrode in the field of electrocatalytic denitrification. The Cu-Bi electrode prepared by electrodeposition at the current density of 6 mA cm−2 was better. The Cu-Bi coating was compact and crystalline by the characterization of SEM, EDS and XRD. Reduction of nitrate was investigated on Cu-Bi cathodes and Ti/Ru-IrO2 anodes. For 100 mg L−1 NO3−-N, the highest NO3−-N removal rate of 87.5% was obtained at the current density of 6 mA cm−2 and in neutral electrolyte at 4 h. The removal of nitrate on Cu-Bi electrodes was better in neutral electrolyte, which didn't require additional acid or alkali to adjust pH. When the initial concentration of NO3−-N was 50 mg L−1, the effluent concentration of NO3−-N at 4 h was 7.175 mg L−1 lower than the level of drinking water on the standard of the World Health Organization (WHO, 10 mg L−1). The kinetic investigation showed that the reduction of nitrate on Cu-Bi displayed pseudo first-order kinetic behavior. The results of Cyclic Voltammetric (CV) measurements indicated that nitrate was reduced on the Cu-Bi electrode with the occurrence of the hydrogen evolution.
科研通智能强力驱动
Strongly Powered by AbleSci AI