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Activated carbon/metal-organic framework nanocomposite: Preparation and photocatalytic dye degradation mathematical modeling from wastewater by least squares support vector machine

Mahmoodi, N. M ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jenvman.2018.12.026
  3. Publisher: Academic Press , 2019
  4. Abstract:
  5. Herein, Kiwi peel activated carbon (AC), Materials Institute Lavoisier (MIL-88B (Fe), and AC/MIL-88B (Fe) composite were synthesized and used as catalysts to degrade Reactive Red 198. The material properties were analyzed by the FTIR, BET-BJH, XRD, FESEM, EDX, TGA, and UV–Vis/DRS. The BET surface area of AC, MIL-88B (Fe) and AC/MIL-88B (Fe) was 1113.3, 150.7, and 199.4 m2/g, respectively. The band gap values (Eg) estimated by Tauc plot method, were obtained 5.06, 4.19 and 3.79 eV for AC, MIL-88B (Fe) and AC/MIL-88B (Fe), respectively. The results indicated that the AC/MIL-88B (Fe) composite had higher photocatalytic activity (99%) than that of pure AC (79%) and MIL-88B (Fe) catalysts (87%). The decolorization kinetic was matched well with the second-order model. Moreover, the data were modeled using least squares support vector machine which optimized with Cuckoo optimization algorithm. The optimal parameters were found 0.837 and 3.49e+02 based on σ2 and γ values, respectively. The mean square error (MSE) and correlation coefficient (R2) values were obtained 3.97 and 0.948. Therefore, the attained data, materials characterization and prediction of modeling validate the composite form of MIL-88B(Fe) with new AC, had better photocatalytic activity in comparison with the individual form
  6. Keywords:
  7. AC/MIL-88B (Fe) composite ; COA-LSSVM modeling ; Metal-organic frameworks (MOFs) ; Photocatalytic degradation ; Synthesis ; Activated carbon ; Dye ; Metal organic framework ; Nanocomposite ; Reactive red 198 ; Unclassified drug ; Algorithm ; Catalysis ; Composite ; Environmental degradation ; Least squares method ; Numerical model ; Organometallic compound ; Photolysis ; Wastewater treatment ; Catalyst ; Correlation coefficient ; Decolorization ; Energy dispersive X ray spectroscopy ; Field emission scanning electron microscopy ; Fourier transform infrared spectroscopy ; Fruit peel ; Kiwifruit ; Mathematical model ; Photocatalysis ; Photodegradation ; Prediction ; Thermogravimetry ; Ultraviolet visible spectroscopy ; Waste water management ; X ray diffraction ; Least square analysis ; Charcoal ; Least-Squares Analysis ; Metal-Organic Frameworks ; Nanocomposites ; Support Vector Machine ; Waste Water
  8. Source: Journal of Environmental Management ; Volume 233 , 2019 , Pages 660-672 ; 03014797 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S030147971831435X