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Abass MR, Ghaly M, Mekawy ZA. Enhanced sorption of strontium radionuclides onto a modified molybdenum titanate composite. Appl Radiat Isot 2024; 212:111447. [PMID: 39053040 DOI: 10.1016/j.apradiso.2024.111447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 06/28/2024] [Accepted: 07/15/2024] [Indexed: 07/27/2024]
Abstract
A study was conducted to investigate the sorption of 85Sr from aqueous solutions using a fabricated magnesium molybdenum titanate (MgMoTi) composite. The MgMoTi composites were synthesized through the co-precipitation technique and characterized using different analytical tools, including FT-IR, XRD, SEM, and EDX. The sorption studies focused on 85Sr and examined factors such as shaking time, pH, ionic strength, temperature, initial ion concentration, and saturation capacity. The results obtained from the study indicated that, under optimum sorption conditions, the saturation capacity for 85Sr onto S-4 and S-5 was determined to be 23.31 and 37.72 mg g-1, respectively. The sorption of 85Sr exhibited dependence on pH and ionic strength. The kinetics of the sorption process followed the pseudo-2nd-order model, while the thermodynamics revealed an endothermic and spontaneous nature. Desorption studies revealed that 0.1 M HCl was the most effective eluent for the complete recovery of 85Sr. Furthermore, the recycling results demonstrated the excellent recyclability of MgMoTi, suggesting its potential application as a sorbent for the removal of 85Sr from aqueous solutions. Overall, the study highlights MgMoTi as a promising composite with practical utility in the sorption of 85Sr from aqueous solutions.
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Affiliation(s)
- M R Abass
- Hot Lab. Centre, Egyptian Atomic Energy Authority, PO 13759, Cairo, Egypt
| | - M Ghaly
- Hot Lab. Centre, Egyptian Atomic Energy Authority, PO 13759, Cairo, Egypt.
| | - Zakaria A Mekawy
- Hot Lab. Centre, Egyptian Atomic Energy Authority, PO 13759, Cairo, Egypt
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Maree RM, Kotb NA, Abass MR. Efficient uptake of 85Sr and 60Co using fabricated inorganic sorbent for reducing radiation doses of simulated low-level waste. Appl Radiat Isot 2024; 208:111264. [PMID: 38531244 DOI: 10.1016/j.apradiso.2024.111264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 02/24/2024] [Accepted: 02/27/2024] [Indexed: 03/28/2024]
Abstract
The present study investigated the sorption behavior of 85Sr and 60Co radionuclides from aqueous solutions onto tin molybdate (SnMo) sorbent. SnMo has been synthesized using the precipitation method and was characterized using four analytical techniques including FT-IR, XRD, SEM, and XRF. The sorption studies applied on 85Sr and 60Co include the effect of shaking time, pH, concentration, and saturation capacity. The experimental data revealed that the sorption process was carried out after equilibrium time (180 min). The saturation capacity for 85Sr and 60Co is measured to be 58.1 and 52.2 mg g-1, respectively. The sorption behavior of studied radionuclides is dependent on pH values. Sorption kinetic better fit with the pseudo-second-order model. Furthermore, the sorption isotherm is better represented by the model proposed by Langmuir. The results of the desorption investigations indicated that the most effective eluents for achieving full recovery of investigated radionuclides were identified. Finally, the recycling results demonstrate the suitability of SnMo for affected sorbing of 85Sr and 60Co from aqueous solutions. All the obtained data clarify that the SnMo sorbent is an effective means of removing 85Sr and 60Co from liquid waste.
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Affiliation(s)
- R M Maree
- Radiation Protection & Safety Department, Hot Laboratories Centre, Egyptian Atomic Energy Authority, Egypt
| | - N A Kotb
- Radiation Protection & Safety Department, Hot Laboratories Centre, Egyptian Atomic Energy Authority, Egypt
| | - M R Abass
- Nuclear Fuel Technology Department, Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, Cairo, Egypt.
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Grisolia A, Dell’Olio G, Spadafora A, De Santo M, Morelli C, Leggio A, Pasqua L. Hybrid Polymer-Silica Nanostructured Materials for Environmental Remediation. Molecules 2023; 28:5105. [PMID: 37446768 PMCID: PMC10343502 DOI: 10.3390/molecules28135105] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/23/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023] Open
Abstract
Due to the ever-growing global population, it is necessary to develop highly effective processes that minimize the impact of human activities and consumption on the environment. The levels of organic and inorganic contaminants have rapidly increased in recent years, posing a threat to ecosystems. Removing these toxic pollutants from the environment is a challenging task that requires physical, chemical, and biological methods. An effective solution involves the use of novel engineered materials, such as silica-based nanostructured materials, which exhibit a high removal capacity for various pollutants. The starting materials are also thermally and mechanically stable, allowing for easy design and development at the nanoscale through versatile functionalization procedures, enabling their effective use in pollutant capture. However, improvements concerning mechanical properties or applicability for repeated cycles may be required to refine their structural features. This review focuses on hybrid/composite polymer-silica nanostructured materials. The state of the art in nanomaterial synthesis, different techniques of functionalization, and polymer grafting are described. Furthermore, it explores the application of polymer-modified nanostructured materials for the capture of heavy metals, dyes, hydrocarbons and petroleum derivatives, drugs, and other organic compounds. The paper concludes by offering recommendations for future research aimed at advancing the application of polymer-silica nanostructured materials in the efficiency of pollutant uptake.
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Affiliation(s)
- Antonio Grisolia
- Department of Environmental Engineering, University of Calabria, via P. Bucci, 87036 Arcavacata di Rende (CS), Italy; (A.G.); (G.D.); (A.S.)
| | - Gianluca Dell’Olio
- Department of Environmental Engineering, University of Calabria, via P. Bucci, 87036 Arcavacata di Rende (CS), Italy; (A.G.); (G.D.); (A.S.)
| | - Angelica Spadafora
- Department of Environmental Engineering, University of Calabria, via P. Bucci, 87036 Arcavacata di Rende (CS), Italy; (A.G.); (G.D.); (A.S.)
| | - Marzia De Santo
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, via P. Bucci, 87036 Arcavacata di Rende (CS), Italy; (M.D.S.); (C.M.)
| | - Catia Morelli
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, via P. Bucci, 87036 Arcavacata di Rende (CS), Italy; (M.D.S.); (C.M.)
| | - Antonella Leggio
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, via P. Bucci, 87036 Arcavacata di Rende (CS), Italy; (M.D.S.); (C.M.)
| | - Luigi Pasqua
- Department of Environmental Engineering, University of Calabria, via P. Bucci, 87036 Arcavacata di Rende (CS), Italy; (A.G.); (G.D.); (A.S.)
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Ghaly M, Abass MR, Mekawy ZA. Performance of molybdenum vanadate loaded on bentonite for retention of cesium-134 from aqueous solutions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:60432-60446. [PMID: 37022555 PMCID: PMC10163132 DOI: 10.1007/s11356-023-26607-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 03/18/2023] [Indexed: 05/08/2023]
Abstract
This article studied the sorption behavior of Cs(I) ions from aqueous solutions onto molybdenum vanadate@bentonite (MoV@bentonite) composite. MoV@bentonite has been fabricated using the precipitation method and was characterized by different analytical tools including, FT-IR, XRD, and SEM attached with an EDX unit. The sorption studies applied on Cs(I) ions include the effect of contact time, pH, initial metal concentrations, ionic strength, desorption, and recycling. The experimental results revealed that in the adsorption process carried out after equilibrium time (300 min), saturation capacity has a value of 26.72 mg·g-1 and the sorption of Cs(I) ions is dependent on pH values and ionic strength. Sorption kinetic better fit with the pseudo-second-order model; sorption isotherms apply to Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) isotherm models. Data of thermodynamic parameters indicate that sorption is spontaneous and endothermic. Recycling experiments show that MoV@bentonite could be used for 7 cycles and the best eluant for the recovery of Cs(I) ions is 0.1 M HCl (76.9%). All the obtained data clarify that MoV@bentonite is considered a promising sorbent for the sorption of Cs(I) ions from aqueous solutions.
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Affiliation(s)
- Mariam Ghaly
- Hot Laboratories, and Waste Management Centre, Egyptian Atomic Energy Authority, Cairo, 13759, Egypt
| | - Mohamed Ragab Abass
- Hot Laboratories, and Waste Management Centre, Egyptian Atomic Energy Authority, Cairo, 13759, Egypt
| | - Zakaria Ali Mekawy
- Hot Laboratories, and Waste Management Centre, Egyptian Atomic Energy Authority, Cairo, 13759, Egypt.
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Abass MR, El-Kenany WM, Eid MA. Sorption of cesium and gadolinium ions onto zirconium silico antimonate sorbent from aqueous solutions. Appl Radiat Isot 2023; 192:110542. [PMID: 36462302 DOI: 10.1016/j.apradiso.2022.110542] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 10/24/2022] [Accepted: 10/27/2022] [Indexed: 11/06/2022]
Abstract
Using a batch equilibrium technique, the sorption of 137Cs and 153Gd onto synthesized zirconium silico antimonate (ZrSiSb) sorbent was examined. The new sorbent was prepared by precipitation technique and characterized by diverse analytical tools. The influence of shaking time, pH, metal ion concentrations, temperature, and a real sample was carried out. The data indicate that ZrSiSb has a very fast equilibrium time (30 min). The distribution coefficient values as a function of pH have sequence order; Cs(I) > Gd(III). The reaction kinetic obeys the pseudo-2nd-order model. The saturation capacity is 69.8 and 27.2 mg/g for Cs(I) and Gd(III), respectively. Equilibrium data were analyzed by various sorption isotherm models. Desorption studies showed that the best eluents for complete recovery (about 99%) of the selected ions are KCl for Cs(I) and CaCl2 for Gd(III). The sorption effectiveness of the new ZrSiSb to remove 137Cs and 153Gd from real low-level radioactive waste was examined. The results obtained showed that the prepared new composite can be applied as a hoped sorbent material to get rid of these radionuclides from different wastewaters.
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Affiliation(s)
- M R Abass
- Hot Laboratories and Waste Management Centre, Egyptian Atomic Energy Authority, 13759, Cairo, Egypt
| | - W M El-Kenany
- Hot Laboratories and Waste Management Centre, Egyptian Atomic Energy Authority, 13759, Cairo, Egypt.
| | - M A Eid
- Hot Laboratories and Waste Management Centre, Egyptian Atomic Energy Authority, 13759, Cairo, Egypt
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Abass M, Breky M, Maree R. Removal of 137Cs and 90Sr from simulated low-level radioactive waste using tin(IV) vanadate sorbent and its potential hazardous parameters. Appl Radiat Isot 2022; 189:110417. [DOI: 10.1016/j.apradiso.2022.110417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 08/01/2022] [Accepted: 08/10/2022] [Indexed: 11/30/2022]
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Abass MR, El-Kenany WM, El-Masry EH. High efficient removal of lead(II) and cadmium(II) ions from multi-component aqueous solutions using polyacrylic acid acrylonitrile talc nanocomposite. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:72929-72945. [PMID: 35619002 PMCID: PMC9522767 DOI: 10.1007/s11356-022-21023-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 05/18/2022] [Indexed: 04/16/2023]
Abstract
This study is interested in the removal of Pb(II), Cd(II), Co(II), Zn(II), and Sr(II) onto polyacrylic acid acrylonitrile talc P(AA-AN)-talc nanocomposite. P(AA-AN)-talc was fabricated using γ-irradiation-initiated polymerization at 50 kGy. Different analytical tools were used to investigate the functional groups, morphology, particle size, and structure of this composite. The ability of P(AA-AN)-talc to capture (Pb2+, Cd2+, Co2+, Zn2+, and Sr2+) as multi-component aqueous solutions was performed by a batch method. Saturation capacity and the effect of (agitating time, pH, initial metal concentrations, and temperature) were investigated. The distribution coefficients at different pHs have order: Pb2+ > Cd2+ > Co2+ > Zn2+ > Sr2+. The saturation capacity decreases by increasing heating temperatures. Reaction kinetic obeys the pseudo-second-order model. Sorption isotherms are more relevant to a Langmuir isotherm, and the monolayer sorption capacity is closed to saturation capacity. Thermodynamic parameters (∆G˚, ∆H˚, and ∆S˚) were endothermic and spontaneous. P(AA-AN)-talc is used for loading and recovery of studied cations in the column system. The study confirms that P(AA-AN)-talc is a promised composite for the sorption of the studied ions from aqueous solutions and should be considered as potential material for decontaminating these ions.
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Affiliation(s)
- Mohamed Ragab Abass
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, Cairo, 13759, Egypt.
| | - Wafaa Mohamed El-Kenany
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, Cairo, 13759, Egypt
| | - Eman Hassan El-Masry
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, Cairo, 13759, Egypt
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Abass MR, Ibrahim AB, Abou-Mesalam MM. Sorption and Selectivity Behavior of Some Rare Earth Elements on Bentonite–Dolomite Composites as Natural Materials. RADIOCHEMISTRY 2022. [DOI: 10.1134/s1066362222030122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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