Adsorption of fluoride onto activated carbon synthesized from Manihot esculenta biomass—Equilibrium, kinetic and thermodynamic studies. Issue 2 (April 2018)

• Record Type: Journal Article
• Authors: Pongener, Chubaakum; Bhomick, Parimal Chandra; Supong, Aola; Baruah, Mridushmita; Sinha, Upasana Bora; Sinha, Dipak
• Is Part Of: Journal of environmental chemical engineering. Volume 6:Issue 2(2018)
• Page Start: 2382
• Page End: 2389
• Publication Date: 2018-04
• Subjects: Adsorption -- Fluoride -- Manihot esculenta -- Regeneration; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2018.02.045
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: Removal of fluoride using cheap, effective activated carbon derived from biomass of Manihot esculenta has been investigated. To understand the properties of activated carbon, characterization using SEM, BET, total pore volume, zero point charge etc. have been studied. The effect of adsorbent dose, contact time, initial concentration and pH on adsorption has been experimentally studied using batch mode of adsorption. Freundlich model of adsorption is found to be best fitted as compared to Langmuir and Temkin model. Kinetic studies indicate that adsorption follows a pseudo-second order kinetic model. Thermodynamic process on adsorption of fluoride onto activated carbon was found to be endothermic and spontaneous. Presence of co-ions on fluoride removal follows the order of CO3 2 − > SO4 2 − > NO3 − ≈ Cl − ≈ Br − . Regeneration of Manihot esculenta activated carbon with NaOH was successfully achieved with NaOH solution upto 98.7% could be regenerated.