文献类型：期刊文献

英文题名：Degradation of P-Nitrophenol By Zif-67 Derivative/Ti - Steel Slag Particle -Graphite Three-Dimensional Electrode System Ⅱ: Effect Factors and Mechanism

作者：Shi, Minqin[1]; Zhao, Yibo[1]; Yang, Jingyi[1]; Wang, Lin[2]; Yuan, Peiqing[3]; Xu, Xinru[1]

机构：[1] International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237, China; [2] Shanghai Baosteel New Building Materials Technology Co., LTD, Mohe Road 301, Shanghai, 201900, China; [3] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230358871)

语种：英文

外文关键词：Electrocatalysis - Electrodes - Electrolysis - Electrolytes - Gas chromatography - Mass spectrometry - Oxidation - Phenols - Slags - Sodium chloride

摘要：As a typical phenolic pollutant, p-nitrophenol (4-NP) is characterized by high toxicity and difficult biochemical treatment, which can cause great harm to the environment. A three-dimensional electrocatalytic oxygen system with ZIF-67 derivative/Ti-x as anode, steel slag as particle electrode, and graphite as cathode was established to purify 4-NP. Under the optimal conditions of 10 V, 6.5 cm electrode spacing, and 0.25 mol/L NaCl as an electrolyte, 94.72% of 4-NP was removed after 60 minutes. In the early stage of electrocatalytic oxidation, indirect oxidation dominates with more than 80%. With the extension of electrolysis time, the contribution of indirect oxidation decreased and that of direct oxidation increased. After 60 minutes of electrolysis, the contribution of indirect oxidation was 49.80% and that of direct oxidation was 33.35%. The adsorption contribution of steel slag was 11.57%. Two possible degradation pathways of 4-NP were obtained by gas chromatography-mass spectrometry (GC-MS) analysis. The first degradation pathway is that 4-NP is first reduced to 4-aminophenol (4-AP) by Fe0/Fe2+ and then gradually mineralized by ·OH. The second degradation pathway is the reaction of ClO- from Cl- in the electrolyte solution with 4-NP to form chlorophenol, which is then oxidized by ·OH. ? 2023, The Authors. All rights reserved.