Electrochemical oxidation of aniline using Ti/RuO2-SnO2 and Ti/RuO2-IrO2 as anode

被引：40
作者：
Zhu, Xu [1 ]
Hu, Weiwu [1 ,2 ]
Feng, Chuanping [1 ]
Chen, Nan [1 ]
Chen, Hongyan [3 ]
Kuang, Peijing [1 ]
Deng, Yang [1 ]
Ma, Linlin [1 ]
机构：
[1] China Univ Geosci Beijing, Sch Water Resources & Environm, 29 Xueyuan Rd, Beijing 100083, Peoples R China
[2] China Univ Geosci Beijing, Journal Ctr, 29 Xueyuan Rd, Beijing 100083, Peoples R China
[3] Beijing Forestry Univ, Coll Sci, 35 Tsinghua East Rd, Beijing 100083, Peoples R China
来源：
CHEMOSPHERE | 2021年 / 269卷 / 269期
基金：
中国国家自然科学基金;
关键词：
Aniline; Electrochemical oxidation; Ti/RuO2-SnO2; Ti/RuO2-IrO2; Chloride ions; Ferrous ion; TANNERY WASTE-WATER; ORGANIC POLLUTANTS; ENERGY-CONSUMPTION; DEGRADATION; PHENOL; 4-CHLOROPHENOL; MINERALIZATION; REDUCTION; POLYANILINE; PERFORMANCE;
D O I：
10.1016/j.chemosphere.2020.128734
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Electrocatalytic properties of anode and the electrolyte composition are important parameters influence the degradation efficiency for aniline wastewater. Ti/RuO2-SnO2 and Ti/RuO2-IrO2 have been fabricated using thermal decomposition method and experiments in electrolyte containing 0.05 M Na2SO4, 0.05 M NaCl and 0.05 M Na2SO4+0.005 M FeSO4 at different current density were conducted to study the influence on aniline degradation. Linear sweep voltammetry (LSV) showed that Ti/RuO2-SnO2 had higher oxygen evolution potential and degrade aniline through electrochemical transformation and electrochemical combustion while Ti/RuO2-IrO2 degrade aniline mainly through electrochemical transformation. The study showed that Ti/RuO2-SnO2 had higher electrocatalytic activity towards the degradation of aniline than Ti/RuO2-IrO2 anode in 0.05 M Na2SO4 and in 0.05 M NaCl electrolyte. The maximum TOC removal efficiency for Ti/RuO2-SnO2 was 64.2% at 40 mA cm(-2) in Na2SO4 electrolyte while the average MCE was 1.6% and the average ECTOC was 1.51 kWh (g TOC)(-1). On the contrary, the maximum TOC removal efficiency for Ti/RuO2-IrO2 was 63.1% at 40 mA cm(-2) in NaCl electrolyte while the average MCE was 1.6% and the average ECTOC was 1.95 kWh (g TOC)(-1). The presence of Fe2+ in Na2SO4 electrolyte would decrease the TOC removal efficiency except at low current density (20 mA cm(-2)) for Ti/RuO2-SnO2. These results indicated that Ti/RuO2-SnO2 and Ti/RuO2-IrO2 anode were suitable in Na2SO4 and NaCl electrolyte, respectively, while the presence of Fe2+ would inhibit aniline degradation. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：10
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