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• W3183176875 endingPage "102220" @default.
• W3183176875 startingPage "102220" @default.
• W3183176875 abstract "Membrane concentrated landfill leachate (MCLL) is a complex wastewater with high amounts of recalcitrant organic pollutants. TiO 2 -based photocatalysis is a promising technique to treat recalcitrant organic pollutants, but the low quantum efficiency limits its application. In this work, an enhanced photocatalysis approach was proposed to treat MCLL based on the synergistic effects of TiO 2 , CuWO 4 and H 2 O 2 , through which 90.56 ± 1.1% COD and 71.83 ± 1.3% TOC can be removed, and the degradation process followed pseudo first-order kinetics. The structural changes of MCLL were examined by spectroscopic techniques. UV–Vis spectral results indicate the effective removal of chromophores in MCLL with decreases in molecular weight, aromaticity and C C/C O content. Fluorescence excitation-emission matrix coupled with parallel factor analysis was used to characterize the changes of fluorescent substances during the enhanced photocatalysis process. Two fluorescent components, i.e., humic-like and fulvic-like components, were identified, both of which were effectively removed. Two-dimensional correlation spectroscopy suggested the degradation of substances in MCLL in the order: humic-like > fulvic-like components & unsaturated conjugate structure > the aromatic structure containing benzene ring. This work provides a deep understanding of structural changes of MCLL and offers a guidance for the treatment of MCLL through enhanced photocatalysis by H 2 O 2 + TiO 2 + CuWO 4 synergism. • TiO 2 -CuWO 4 -H 2 O 2 synergism-based enhanced photocatalysis was used to treat MCLL. • The structural variation of MCLL during enhanced photocatalysis process was clarified. • Fluorescence constituent changes in MCLL were tracked by EEM-PARAFAC. • Sequence of compositional change in MCLL was identified by 2DCOS analysis." @default.
• W3183176875 created "2021-08-02" @default.
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• W3183176875 date "2021-10-01" @default.
• W3183176875 modified "2023-09-29" @default.
• W3183176875 title "Unveiling the degradation of membrane concentrated landfill leachate during enhanced photocatalysis using spectroscopic approaches" @default.
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• W3183176875 doi "https://doi.org/10.1016/j.jwpe.2021.102220" @default.
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