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Advanced landfill leachate biochemical effluent treatment using Fe-Mn/AC activates O3/Na2S2O8 process: process optimization, wastewater quality analysis, and activator characterization.
Liu, Zhanmeng; Pan, Liang; Hu, Fengping; Hu, Yunqi.
Afiliação
  • Liu Z; School of Civil Engineering and Architecture, East China Jiao Tong University, 808 East Shuanggang Road, Nanchang, 330013, China. ustblzm@sina.com.
  • Pan L; School of Civil Engineering and Architecture, East China Jiao Tong University, 808 East Shuanggang Road, Nanchang, 330013, China.
  • Hu F; School of Civil Engineering and Architecture, East China Jiao Tong University, 808 East Shuanggang Road, Nanchang, 330013, China.
  • Hu Y; School of Civil Engineering and Architecture, East China Jiao Tong University, 808 East Shuanggang Road, Nanchang, 330013, China.
Environ Sci Pollut Res Int ; 27(13): 15337-15349, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32077017
ABSTRACT
A novel catalyst of Fe-Mn/AC was prepared and used as a heterogeneous catalyst to activate O3/Na2S2O8 for landfill leachate biochemical effluent treatment. The experimental results indicated that the highest COD (84%) and color (98%) removal was obtained at Fe-Mn/AC dosage 1.2 g/L, O3 concentration 1.2 g/L, Na2S2O8 dosage 6 g/L, initial pH 10, and reaction time 100 min. Three-dimensional and excitation emission matrix (3D-EEM) fluorescence spectrometry, Fourier transform infrared spectroscopy (FTIR), and gas chromatography mass spectrometry (GC/MS) of wastewater samples before and after treatment demonstrated that the leachate biochemical effluent contained a large amount of humic and fulvic acid organic compounds. After treatment with this coupling system, both the pollution level of dissolved organic matter (DOM) and the fluorescence intensity declined. The micro morphology of Fe-Mn/AC was characterized using scanning X-ray diffraction patterns (XRD), electron microscope spectra (SEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) spectroscopy. It can be concluded that the microscopic morphology of the catalyst is porous. The main active components are amorphous MnO2 and multivalent iron oxides. Furthermore, the Fe-Mn/AC catalyst showed great reusability; the removal efficiency of COD was only reduced from 84% to 79% at the fourth reaction. Moreover, the COD removal efficiency could recover to 81% after catalyst regeneration.
Assuntos
Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Águas Residuárias Idioma: Inglês Revista: Environ Sci Pollut Res Int Assunto da revista: Saúde Ambiental / Toxicologia Ano de publicação: 2020 Tipo de documento: Artigo País de afiliação: China

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Águas Residuárias Idioma: Inglês Revista: Environ Sci Pollut Res Int Assunto da revista: Saúde Ambiental / Toxicologia Ano de publicação: 2020 Tipo de documento: Artigo País de afiliação: China
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