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Dynamic Adsorption on Fixed-Bed Column of Manganese Oxoanions (MnO4-) in Aqueous Media on Activated Carbon Prepared from Palm Nut Shells

Charly Mve Mfoumou, Pradel Tonda-Mikiela, Francis Ngoye, Mbouiti Berthy Lionel, Bouassa Mougnala Spenseur, Alexander Sachse, Samuel Mignard, Guy Raymond Feuya Tchouya

Journal of Environment Pollution and Human Health. 2022, 10(2), 58-70 doi:10.12691/jephh-10-2-4
  • Figure 1. Scheme of the experimental set-up of the adsorption process
  • Figure 2. Isotherm of N2 adsorption/desorption obtained at 77 K on the studied activated carbon
  • Figure 3. Determination of pH at the point of zero charge (pHPZC) on the activated carbon studied
  • Figure 4. Breakthrough curves of MnO4- obtained at 298 K on the beds of the prepared GAC composed of particles of different sizes with H = 0.5 cm, D = 3 mL.min-1, C0 = 50 mg.L-1 and pH = 6.5
  • Figure 5. Breakthrough curves of MnO4- obtained on GAC prepared at 298 K at different initial concentrations of the solution of MnO4- (C0) with D = 3 mL.min-1; pH = 6.5; H = 1 cm and bed particle size 0.04<x<0.01
  • Figure 6. Breakthrough curves of MnO4- obtained on prepared GAC at 298 K at different flow rates (D) with C0 = 50 mg.L-1; pH = 6.5; H = 1 cm and bed particle size 0.04<x<0.01
  • Figure 7. Breakthough curves of MnO4- obtained on prepared GAC at 298 K at different pH of initial solution of MnO4- with C0 = 50 mg.L-1; D = 3 mL.min-1; H = 1 cm and bed particle size 0.04<x<0.01
  • Figure 8. Models of pseudo-first-order (a) and pseudo-second-order (b) kinetics applied to experimental data from the fixed-bed dynamic adsorption study of MnO4- on prepared GAC at different pH of the initial MnO4- solution
  • Figure 9. Intraparticle kinetic model applied to experimental data from the study of fixed-bed dynamic adsorption of MnO4- on the prepared GAC at different pH of the initial MnO4- solution