Development of Nanoporous Alumino-borosilicate as a Novel Matrix for the Sorption and Stable Immobilization of Cesium Ions

Abbasi, Ali; Davarkhah, Reza; Avanes, Armen; Yadollahi, Ali; Ghannadi‐Maragheh, Mohammad; Sepehrian, Hamid

doi:10.1007/s10904-019-01195-z

Cited by 11 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The value of ΔG° (− 27.03 kJ/mol at 283 K and − 28.47 kJ/mol at 298 K, respectively) became more negative with the increase of temperature, which indicated that the adsorption process was more favorable at higher temperatures 36 , 38 . The values of − 400 < ΔG° < − 80 kJ/mol describes chemical adsorption while, the value of − 20 < ΔG° < 0 kJ/mol describes physical adsorption, and the value of − 80 < ΔG° < − 20 kJ/mol describes combination of physical and chemical adsorption 39 – 41 . Therefore, the values of calculated ΔG° confirmed the physicochemical adsorption property.…”

Section: Resultsmentioning

confidence: 99%

Adsorption and safe immobilization of Sr ions in modified zeolite matrices

Fayezi,

Shiri-Yekta,

Sepehrian

et al. 2023

Sci Rep

Self Cite

View full text Add to dashboard Cite

In the present study, an Iranian natural zeolite (Sabzevar region) was evaluated as a natural adsorbent for the elimination and immobilization of strontium ions from an aqueous solution. For improving the adsorption efficiency of strontium ion, the zeolite surface was modified by the Schiff base ligand of bis (2-hydroxybenzaldehyde)1,2-diaminoethane (H2L). The natural zeolite and zeolite/H2L were characterized using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-ray fluorescence (XRF), BET and scanning electron microscope (SEM). Analysis of the natural zeolite showed that the zeolite is from the type of clinoptilolite and has a crystalline structure with the specific surface area 29.74 m2/g. The results showed that strontium adsorption onto modified zeolite increases compared to unmodified zeolite from 64.5% to 97.2% (at pH = 6). The effective parameters pH, adsorbent dosage, initial concentration of strontium ions, contact time, temperature, and interfering ions, were studied and optimized. The maximum adsorption efficiency was confirmed by modified zeolite and found to be 97.5% after 60 min of equilibrium time at pH 6, 0.05g as adsorbent dosage, and at 25 °C. Adsorption of strontium was confirmed by Langmuir model with maximum adsorption capacity of 10.31 mg/g. Kinetic studies showed that the adsorption of strontium ions on the adsorbent follows pseudo-second-order (PSO) model. Also, the thermodynamics of the adsorption process indicated that the adsorption of strontium on zeolite/H2L is an endothermic and spontaneous process, and the adsorption mechanism is a combination of physical and chemical adsorption. Finally, to manage the secondary waste generated from the adsorption process, strontium ions were immobilized in a zeolite structure. The results showed that the stabilization is well done with the thermal preparation process. After thermal treatment at 25–900 °C, modified zeolite satisfactorily retains strontium during back-exchange tests with NaCl solution. According to the results, the amount of strontium released from the adsorbent phase decreases from 52.6 to 1.6% with increasing heat treatment temperature.

show abstract

Section: Resultsmentioning

confidence: 99%

Adsorption and safe immobilization of Sr ions in modified zeolite matrices

Fayezi,

Shiri-Yekta,

Sepehrian

et al. 2023

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…Results show that the nanoporous AlBS sample provides 485 m 2 .g −1 specific surface areas. More details including FTIR spectrum, SEM and TEM images of the nanoporous AlBS matrix are given in the previously published article 31 .…”

Section: Characterization Of the Nanoporous Albsmentioning

confidence: 99%

Efficient sorption and secure immobilization of strontium ions onto nanoporous alumino-borosilicate as a new matrix

Abbasi,

Avanes,

Davarkhah

et al. 2024

Preprint

Self Cite

View full text Add to dashboard Cite

The objective behind developing the nanoporous alumino-borosilicate (AlBS) was to remove strontium (Sr) from liquid waste and subsequently stabilize it. The sorption capacity of the nanoporous AlBS was assessed in relation to various experimental factors, including contact time, temperature, initial pH solution, and initial concentration of Sr. According to the obtained results, nanoporous AlBS shows a maximum Sr sorption capacity of 125.0 mg.g− 1. In order to achieve stable immobilization of the sorbed Sr ions, heat treatments at different temperatures were applied to the Sr-containing nanoporous AlBS. Various eluents were used in the leach tests to examine the Sr leaching from heat-treated materials. Only 3.43% of the Sr initially adsorbed in the nanoporous AlBS matrix was washed out with 1M sodium chloride eluent, showing that heating the sample to around 1100°C successfully trapped Sr in the nanoporous AlBS matrix.

show abstract

“…The Na and B leaching rates were obtained in the order of 10 −3 g m -2 .day −1 after 112 days. A novel matrix of nanoporous alumino-borosilicate was developed for cesium removal from liquid radioactive waste and its stable immobilization (Abbasi et al, 2020). The matrix showed the maximum Cs sorption (removal of a compound from solution by solid-phase constituents) capacity.…”

Section: Chemical Durability Of Glass Wasteformsmentioning

confidence: 99%

Matrices for radioactive waste immobilization: a review

Pilania,

Dube

2023

Front. Mater.

View full text Add to dashboard Cite

Nuclear energy is considered a clean, reliable, and an inexhaustible energy source for power generation. Nuclear power is harnessed from nuclear fission reactions in a dedicated power plant. The by-products (produced in the nuclear power plant) are radioactive and pose a threat to the environment. The safe disposal of nuclear waste is vital to ensure the sustainable use of the nuclear energy. The immobilization of radioactive waste before final disposal is essential for the interim storage and transportation. This review summarizes the recent work on glass, ceramics, and glass–ceramics matrices to immobilize high-level waste. The synthesis methods, leaching behavior, and radiation resistance of matrices are discussed briefly.

show abstract

Development of Nanoporous Alumino-borosilicate as a Novel Matrix for the Sorption and Stable Immobilization of Cesium Ions

Cited by 11 publications

References 30 publications

Adsorption and safe immobilization of Sr ions in modified zeolite matrices

Adsorption and safe immobilization of Sr ions in modified zeolite matrices

Efficient sorption and secure immobilization of strontium ions onto nanoporous alumino-borosilicate as a new matrix

Matrices for radioactive waste immobilization: a review

Contact Info

Product

Resources

About