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Simultaneous electro-transfer of vanadium slag and electrocatalytic degradation of lignin in sulfuric acid solution
Journal of Industrial and Engineering Chemistry ( IF 5.9 ) Pub Date : 2022-01-04 , DOI: 10.1016/j.jiec.2021.12.034
Zhe Deng 1 , Hongxian Fan 1 , Chunxing Lan 1 , Songmei Zhang 1 , Gang Li 1
Affiliation  

Simultaneous electro-transfer of vanadium slag (V-slag) and electrochemical degradation of corncob lignin between two graphite electrodes in sulfuric acid solution were proposed. The electrochemical performance of V-slag dissolved by sulfuric acid solution on the graphite electrode was tested by cyclic voltammetry (CV) and linear polarization (LP) curves. By electrochemical transfer of Fe2+/Fe3+ and VO2+/VO2+ couple, it was found that iron and vanadium in V-slag played an important role in electrocatalysis. SEM, EDS and FT-IR were conducted to characterize the morphology, surface composition and the functional groups of lignin residues. By the inductively coupled plasma spectrometer (ICP) analysis, the cumulative removal rates of Fe and V in V-slag could reach up to 61.3% and 52.6%, respectively after multi rounds reaction. 30 kinds of compounds were identified in the process of degradation via GC–MS analysis. These results provided a new process for valorizing two widespread waste materials, V-slag and corncob lignin.



中文翻译:

硫酸溶液中钒渣的同时电转移和木质素的电催化降解

提出了在硫酸溶液中两个石墨电极之间同时电转移钒渣(V-slag)和电化学降解玉米芯木质素。通过循环伏安法(CV)和线性极化(LP)曲线测试了硫酸溶液溶解钒渣在石墨电极上的电化学性能。通过 Fe 2+ /Fe 3+和 VO 2+ /VO 2 +的电化学转移夫妇发现钒渣中的铁和钒在电催化中起重要作用。采用SEM、EDS和FT-IR对木质素残基的形貌、表面组成和官能团进行表征。通过电感耦合等离子体光谱仪(ICP)分析,经过多轮反应,钒渣中Fe和V的累积去除率分别可达61.3%和52.6%。通过 GC-MS 分析鉴定了降解过程中的 30 种化合物。这些结果为评估两种普遍存在的废料 V 型渣和玉米芯木质素提供了一种新工艺。

更新日期:2022-01-04
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