圖片摘要
Abstract
Pulsed dischargeplasma (PDP) induced complex catalysis for synergetic removal of thiamphenicol(TAP) was investigated using graphene-WO3-Fe3O4 nanocomposites. The prepared samples were characterized systematically in viewof the structure and morphology, chemical bonding state, optical property,electrochemical property and magnetic property. Based on characterization andTAP degradation, the catalytic performance followed: graphene-WO3-Fe3O4>graphene-WO3>WO3,and the highest removal efficiency and kinetic constant could reached 99.3% and0.070 min-1, respectively. With increase of catalyst dosage, theremoval efficiency firstly enhanced and then declined. Lower pH value wasbeneficial for TAP degradation. The prepared graphene-WO3-Fe3O4 owed higher stability and lower dissolution rate of iron ion. The rGO-WO3-Fe3O4 could decompose O3 and H2O2 into more ⋅OH in PDP system.The degradation intermediates were characterized by fluorescence spectrograph,LC-MS and IC. Based on the detected intermediates and discrete Fouriertransform (DFT) analysis, degradation pathway of TAP was proposed. Besides, thetoxicity of intermediates was predicted. Finally, catalytic degradationmechanism of TAP by PDP with graphene-WO3-Fe3O4 was summarized.
中文摘要
以上為個人理解,僅供參考,詳細信息可參見原文。
原文連結:
https://doi.org/10.1016/j.jhazmat.2020.123673