Adsorption of U(VI) ions from aqueous solutions by activated carbon prepared from Antep pistachio (Pistacia vera L.) shells
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Ramazan Donat
und
Kadriye Esen Erden
Abstract
Antep pistachio (Pistacia vera L.) shells an abundant and low cost natural resource in Turkey was used to prepare activated carbon by physiochemical activation and carbon dioxide (CO2) atmosphere as the activating agents at 700°C for 2 h. The adsorption equilibrium of U(VI) from aqueous solutions on such carbon has been studied using a batch system. The parameters that affect the U(VI) adsorption, such as particle size of adsorbent, contact time, of pH of the solution, and temperature, have been investigated and conditions have also been optimized. The equilibrium data for U(VI) ions’ adsorption onto activated carbon well fitted to the Langmuir equation, with a maximum monolayer adsorption capacity of 8.68 mg/g, The Freundlich and Dubinin–Radushkevich (D–R) isotherms have been applied and the data correlated well with Freundlich model and that the adsorption is physical in nature (Ea=15.46 kJ/mol). Thermodynamic parameters [ΔHs=11.33 kJ/mol, ΔS=0.084 kJ/molK, ΔG (293.15 K)=−13.29 kJ/mol] showed the endothermic heat of adsorption and the feasibility of the process.
Acknowledgments
This work was supported by Scientific Research Project Foundation of Pamukkale University, Project No: 2006FEF021 to which the authors are grateful.
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©2017 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Neutron capture cross section measurements and theoretical calculation for the 186W(n,γ)187W reaction
- Adsorption of U(VI) ions from aqueous solutions by activated carbon prepared from Antep pistachio (Pistacia vera L.) shells
- Radiolytic syntheses of hollow UO2 nanospheres in Triton X-100-based lyotropic liquid crystals
- Hafnium(IV) complexation with oxalate at variable temperatures
- Radioiodinated famotidine as a new highly selective radiotracer for peptic ulcer disorder detection, diagnostic nuclear imaging and biodistribution
- Optimized production, quality control, biological evaluation and PET/CT imaging of 68Ga-PSMA-617 in breast adenocarcinoma model
- Pilot-scale study of the radiation-induced silica removal from underground brackish water in Saudi Arabia
- Developing methodologies for source attribution: glass phase separation in Trinitite using NF3
Artikel in diesem Heft
- Frontmatter
- Neutron capture cross section measurements and theoretical calculation for the 186W(n,γ)187W reaction
- Adsorption of U(VI) ions from aqueous solutions by activated carbon prepared from Antep pistachio (Pistacia vera L.) shells
- Radiolytic syntheses of hollow UO2 nanospheres in Triton X-100-based lyotropic liquid crystals
- Hafnium(IV) complexation with oxalate at variable temperatures
- Radioiodinated famotidine as a new highly selective radiotracer for peptic ulcer disorder detection, diagnostic nuclear imaging and biodistribution
- Optimized production, quality control, biological evaluation and PET/CT imaging of 68Ga-PSMA-617 in breast adenocarcinoma model
- Pilot-scale study of the radiation-induced silica removal from underground brackish water in Saudi Arabia
- Developing methodologies for source attribution: glass phase separation in Trinitite using NF3
