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Unveiling the catalytic ability of carbonaceous materials in Fenton-like reaction by controlled-release CaO2 nanoparticles for trichloroethylene degradation

Ali, M ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jhazmat.2021.125935
  3. Publisher: Elsevier B.V , 2021
  4. Abstract:
  5. Carbonaceous materials (CMs) have been applied extensively for enhancing the catalytic performance of environmental catalysts, however, the self-catalytic mechanism of CMs for groundwater remediation is rarely investigated. Herein, we unveiled the catalytic ability of various CMs via Fe(III) reduction through polyvinyl alcohol-coated calcium peroxide nanoparticles (PVA@nCP) for trichloroethylene (TCE) removal. Among selected CMs (graphite (G), biochar (BC) and activated carbon (AC)), BC and AC showed enhancement of TCE removal of 89% and 98% via both adsorption and catalytic degradation. BET and SEM analyses showed a higher adsorption capacity of AC (27.8%) than others. The generation of solution-Fe(II) and surface-Fe(II) revealed the reduction of Fe(III) on CMs-surface. The role of O-containing groups was investigated by the FTIR technique and XPS quantified the 52% and 57% surface-Fe(II) in BC and AC systems, respectively. EPR and quenching tests confirmed that both solution and surface-bound species (HO•, O2−• and 1O2) contributed to TCE degradation. Acidic pH condition encouraged TCE removal and the presence of HCO3− negatively affected TCE removal than other inorganic ions. Both schemes (PVA@nCP/Fe(III)/BC and PVA@nCP/Fe(III)/AC) exhibited promising results in the actual groundwater, surfactant-amended solution, and removal of other chlorinated-pollutants, opening a new direction towards green environmental remediation for prolonged benefits. © 2021 Elsevier B.V
  6. Keywords:
  7. Activated carbon ; Anesthetics ; Calcium compounds ; Iron compounds ; Nanoparticles ; Peroxides ; % reductions ; Active species ; Bio chars ; Calcium peroxides ; Carbonaceous materials ; Catalytic ability ; Fenton-like reactions ; Ferric iron ; Surface Fe ; Surface functionalities ; Oxidation ; 1,10 phenanthroline ; Calcium oxide ; Calcium peroxide ; Ferric ion ; Ferrous ion ; Graphite ; Hydroxyl radical ; Oxygen ; Polyvinyl alcohol ; Singlet oxygen ; Superoxide ; Unclassified drug ; Ground water ; Biochar ; Catalysis ; Catalyst ; Chlorination ; Iron ; Nanoparticle ; Performance assessment ; Pollutant removal ; Reduction ; Adsorption ; Controlled study ; Dechlorination ; Degradation ; Desorption ; Ecosystem restoration ; Electron spin resonance ; Fenton reaction ; Fourier transform infrared spectroscopy ; Gas chromatography ; Maize ; Particle size ; pH ; Physical chemistry ; Pore size ; Pore size distribution ; Pore volume ; Porosity ; Precipitation ; Scanning electron microscopy ; Surface area ; Waste component removal ; X ray photoemission spectroscopy ; Delayed release formulation ; Oxidation reduction reaction ; Water pollutant ; Delayed-Action Preparations ; Ferric Compounds ; Groundwater ; Oxidation-Reduction ; Trichloroethylene ; Water Pollutants, Chemical
  8. Source: Journal of Hazardous Materials ; Volume 416 , 2021 ; 03043894 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0304389421008992