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From

Adsorption of Fluoride (F-) from Aqueous Solution by Using Pineapple (Ananas comosus) Peel and Orange (Citrus sinensis) Peel Powders

N. Gandhi, D. Sirisha, K.B. Chandra Sekhar

International Journal of Environmental Bioremediation & Biodegradation. 2016, 4(2), 55-67 doi:10.12691/ijebb-4-2-4
  • Figure 1. Variation of contact time between fluoride and Adsorbents
  • Figure 2. Variation of initial fluoride concentration on adsorbents
  • Figure 3. Variation of adsorbent dosage on fluoride
  • Figure 4. Effect of pH on adsorption of fluoride
  • Figure 5. adsorption capacity of pineapple peel and orange peel at different temperature
  • Figure 6. Temkin isotherm for removal of fluoride by pineapple powder
  • Figure 7. Temkin isotherm for removal of fluoride by Orange peel powder
  • Figure 8. Freundlich adsorption isotherms for removal of fluoride by pineapple peel powder
  • Figure 9. Freundlich adsorption isotherms for removal of fluoride by orange peel powder
  • Figure 10. Langmiur adsorption isotherms plots for removal of fluoride by using orange peel powder
  • Figure 11. Langmiur adsorption isotherms plots for removal of fluoride by using orange peel powder
  • Figure 12. Relationship between 1/T and ln k
  • Figure 13 (a). Lagergren (Pseudo First Order Equation) Model for pineapple peel
  • Figure 13 (b). Lagergren (Pseudo First Order Equation) Model for orange peel
  • Figure 14 (a). Elovich Model for removal of fluoride using pineapple peel powder
  • Figure 14 (b). Elovich Model for removal of fluoride using orange peel powder
  • Figure 15 (a). Pseudo Second Order Model for removal of fluoride pineapple powder
  • Figure 15 (b). Pseudo Second Order Model for removal of fluoride orange peel powder
  • Figure 16 (a). Intraparticle diffusion model for adsorption of fluoride by pineapple peel powder
  • Figure 16 (b). Intraparticle diffusion model for adsorption of fluoride by orange peel powder