Adsorption of fluoride onto activated carbon synthesized from Manihot esculenta biomass—Equilibrium, kinetic and thermodynamic studies
| Autor: | Aola Supong, Dipak Sinha, Chubaakum Pongener, Upasana Bora Sinha, Mridushmita Baruah, Parimal Chandra Bhomick |
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| Rok vydání: | 2018 |
| Předmět: |
Langmuir
Process Chemistry and Technology food and beverages Biomass 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Pollution Endothermic process chemistry.chemical_compound Adsorption chemistry Volume (thermodynamics) medicine Chemical Engineering (miscellaneous) 0210 nano-technology Waste Management and Disposal Fluoride 0105 earth and related environmental sciences Activated carbon medicine.drug Nuclear chemistry Thermodynamic process |
| Zdroj: | Journal of Environmental Chemical Engineering. 6:2382-2389 |
| ISSN: | 2213-3437 |
| Popis: | 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 CO32− > SO42− > NO3− ≈ Cl− ≈ Br−. Regeneration of Manihot esculenta activated carbon with NaOH was successfully achieved with NaOH solution upto 98.7% could be regenerated. |
| Databáze: | OpenAIRE |
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