Preparation and evaluation of Pd-Sn modified Ru-Ir electrode for denitrification of high chlorine ammonia–nitrogen wastewater

Yang, Zhen-xing; Shang, Jie; Yan, Guangxu; Wang, Yuxian; Guo, Shaohui

doi:10.1007/s11356-022-18535-1

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…Electro-catalytic oxidation processes consist of a direct electrochemical reaction focusing on electron transfer and an indirect electrochemical reaction in which electrolysis produces strong oxidizing substances that destroy organic molecules and mineralize pollutants (Yang et al 2022). By combining the direct and indirect electrochemical reactions, electrocatalytic oxidation technology successfully degrades organic matter and puri es wastewater.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the electrochemical degradation of alizarin green (AG) by Ti/PbO2 electrode and Ti/IrO2+Ta2O5 electrode

Miao

Zhong

Zhang

et al. 2023

Preprint

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In this study, the degradation of alizarin green (AG) by Ti/PbO2 electrode and Ti/IrO2 + Ta2O5 electrode was investigated; specifically, the degradation efficiency was compared. The optimal conditions for degradation, as determined from the results, were as follows: an initial concentration of the pollutant (AG) of 100 mg/L, an electrolyte (Na2SO4) concentration of 0.1 mol/L, a current density of 30 mA/cm2, and a pH of 5.86. Under these optimal conditions, the AG removal rate and chemical oxygen demand (COD) removal rate were greater than 81.4% and 51.6%, respectively, by Ti/PbO2 electrode and Ti/IrO2 + Ta2O5 electrode after 70 min of degradation. In comparison with the mud-cracked surface of the Ti/IrO2 + Ta2O5 electrode, the Ti/PbO2 electrode showed higher stability for its pyramid crystal structure. Furthermore, during degradation, accelerated spalling phenomena were observed by SEM on the Ti/IrO2 + Ta2O5 electrode surface owing to the mud-cracked surface structure. As a result, a TiO2 passive film was formed, which lead to an increase in cell pressure and a decrease in the electrocatalysis ability of the Ti/IrO2 + Ta2O5 electrode.

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Section: Introductionmentioning

confidence: 99%

Comparison of the electrochemical degradation of alizarin green (AG) by Ti/PbO2 electrode and Ti/IrO2+Ta2O5 electrode

Miao

Zhong

Zhang

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Application of Pd-Sn modified Ru-Ir electrode for treating high chlorine ammonia-nitrogen wastewater

Yang

Xie

et al. 2022

Environmental Technology

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Electro-catalytic technology has attracted increasing attention as a promising approach for wastewater treatment, owing to its easy operation, minimal generation of secondary pollution, small foot-print and rapid start-up. In this work, the chlorine evolution potential of the Pd-Sn modi ed ruthenium(Ru)iridium(Ir) electrode was investigated for electro-catalytic treatment of high chlorine ammonia-nitrogen wastewater. The effect of reaction conditions on the removal of ammonia-nitrogen, kinetics and apparent activation energy of the electro-catalytic treatment of ammonia-nitrogen were studied. The possible denitri cation process of high chlorine ammonia-nitrogen wastewater treated by electrocatalysis was discussed. The results indicated that the chlorine evolution potential of the Pd-Sn modi ed Ru-Ir electrode was 1.0956 V(vs. SCE). The rule of electro-catalytic treatment of high chlorine ammonia-nitrogen conformed to zero-order kinetics, and the removal process was endothermic reaction with the apparent activation energy of 14.089 kJ/mol. With the current is 0.5 A, the removal e ciency of ammonia-nitrogen could achieve 100% at the reaction time of 40 min. Indirect oxidation played an essential role in the electro-catalytic ammonia-nitrogen removal using the Pd-Sn modi ed Ru-Ir electrode. This paper demonstrated that the electro-catalytic technology was a promising approach for e ciently treating the high chlorine ammonia-nitrogen wastewater.

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Preparation and evaluation of Pd-Sn modified Ru-Ir electrode for denitrification of high chlorine ammonia–nitrogen wastewater

Cited by 2 publications

References 26 publications

Comparison of the electrochemical degradation of alizarin green (AG) by Ti/PbO2 electrode and Ti/IrO2+Ta2O5 electrode

Comparison of the electrochemical degradation of alizarin green (AG) by Ti/PbO2 electrode and Ti/IrO2+Ta2O5 electrode

Application of Pd-Sn modified Ru-Ir electrode for treating high chlorine ammonia-nitrogen wastewater

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