Immobilization of Co-60 and Sr-90 Ions Using Red Mud from Aluminum Industry
Апстракт
The removal of Co-60 and Sr-90 from the aqueous phase was tested using red mud - the fine grained residue from bauxite ore processing. This industrial waste represents a mixture of numerous minerals, mainly oxides and hydroxides of Fe, Al, Si, and Ti. Experiments were conducted as a function of contact time, pH, and pollutant concentrations. Kinetic data were well fitted with a pseudo-second order equation. The calculated rate constants and initial sorption rates indicated faster sorption of Sr2+ ions. Removal of both cations rapidly increased with the initial pH increase from 2.5 to 3.5. With the further increase of pH, Co2+ sorption was nearly constant (98%-100%), whereas Sr2+ removal remained at the same level to initial pH similar to 8 and gradually increased to 100% at pH 12. Equilibrium sorption data followed the Langmuir model, with the maximum sorption capacities of 0.52 mmol/g for Co2+ and 0.31 mmol/g for Sr2+. Sorbed cations exhibited high stability in distilled water. Desorp...tion of Co2+ was also negligible in the presence of the competing Ca2+ cation, while 42%-25% of Sr2+ ions were desorbed depending on the previously sorbed amount. The results indicate that red mud is of potential significance as Co2+ and Sr2+ immobilization agent due to its high efficiency, abundance, and low-cost.
Кључне речи:
Sr-90 / Co-60 / immobilization / red mudИзвор:
Nuclear technology and radiation protection, 2014, 29, 1, 79-87Финансирање / пројекти:
- Нове технологије за мониторинг и заштиту животног окружења од штетних хемијских супстанци и радијационог оптерећења (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-43009)
Колекције
Институција/група
VinčaTY - JOUR AU - Milenković, Aleksandra S. AU - Smičiklas, Ivana D. AU - Marković, Jelena P. AU - Vukelić, Nikola S. PY - 2014 UR - https://vinar.vin.bg.ac.rs/handle/123456789/5973 AB - The removal of Co-60 and Sr-90 from the aqueous phase was tested using red mud - the fine grained residue from bauxite ore processing. This industrial waste represents a mixture of numerous minerals, mainly oxides and hydroxides of Fe, Al, Si, and Ti. Experiments were conducted as a function of contact time, pH, and pollutant concentrations. Kinetic data were well fitted with a pseudo-second order equation. The calculated rate constants and initial sorption rates indicated faster sorption of Sr2+ ions. Removal of both cations rapidly increased with the initial pH increase from 2.5 to 3.5. With the further increase of pH, Co2+ sorption was nearly constant (98%-100%), whereas Sr2+ removal remained at the same level to initial pH similar to 8 and gradually increased to 100% at pH 12. Equilibrium sorption data followed the Langmuir model, with the maximum sorption capacities of 0.52 mmol/g for Co2+ and 0.31 mmol/g for Sr2+. Sorbed cations exhibited high stability in distilled water. Desorption of Co2+ was also negligible in the presence of the competing Ca2+ cation, while 42%-25% of Sr2+ ions were desorbed depending on the previously sorbed amount. The results indicate that red mud is of potential significance as Co2+ and Sr2+ immobilization agent due to its high efficiency, abundance, and low-cost. T2 - Nuclear technology and radiation protection T1 - Immobilization of Co-60 and Sr-90 Ions Using Red Mud from Aluminum Industry VL - 29 IS - 1 SP - 79 EP - 87 DO - 10.2298/NTRP1401079M ER -
@article{ author = "Milenković, Aleksandra S. and Smičiklas, Ivana D. and Marković, Jelena P. and Vukelić, Nikola S.", year = "2014", abstract = "The removal of Co-60 and Sr-90 from the aqueous phase was tested using red mud - the fine grained residue from bauxite ore processing. This industrial waste represents a mixture of numerous minerals, mainly oxides and hydroxides of Fe, Al, Si, and Ti. Experiments were conducted as a function of contact time, pH, and pollutant concentrations. Kinetic data were well fitted with a pseudo-second order equation. The calculated rate constants and initial sorption rates indicated faster sorption of Sr2+ ions. Removal of both cations rapidly increased with the initial pH increase from 2.5 to 3.5. With the further increase of pH, Co2+ sorption was nearly constant (98%-100%), whereas Sr2+ removal remained at the same level to initial pH similar to 8 and gradually increased to 100% at pH 12. Equilibrium sorption data followed the Langmuir model, with the maximum sorption capacities of 0.52 mmol/g for Co2+ and 0.31 mmol/g for Sr2+. Sorbed cations exhibited high stability in distilled water. Desorption of Co2+ was also negligible in the presence of the competing Ca2+ cation, while 42%-25% of Sr2+ ions were desorbed depending on the previously sorbed amount. The results indicate that red mud is of potential significance as Co2+ and Sr2+ immobilization agent due to its high efficiency, abundance, and low-cost.", journal = "Nuclear technology and radiation protection", title = "Immobilization of Co-60 and Sr-90 Ions Using Red Mud from Aluminum Industry", volume = "29", number = "1", pages = "79-87", doi = "10.2298/NTRP1401079M" }
Milenković, A. S., Smičiklas, I. D., Marković, J. P.,& Vukelić, N. S.. (2014). Immobilization of Co-60 and Sr-90 Ions Using Red Mud from Aluminum Industry. in Nuclear technology and radiation protection, 29(1), 79-87. https://doi.org/10.2298/NTRP1401079M
Milenković AS, Smičiklas ID, Marković JP, Vukelić NS. Immobilization of Co-60 and Sr-90 Ions Using Red Mud from Aluminum Industry. in Nuclear technology and radiation protection. 2014;29(1):79-87. doi:10.2298/NTRP1401079M .
Milenković, Aleksandra S., Smičiklas, Ivana D., Marković, Jelena P., Vukelić, Nikola S., "Immobilization of Co-60 and Sr-90 Ions Using Red Mud from Aluminum Industry" in Nuclear technology and radiation protection, 29, no. 1 (2014):79-87, https://doi.org/10.2298/NTRP1401079M . .