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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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2
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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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3
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Shahr El-Din AM, Rizk HE, Borai EH, El Afifi ESM. Selective separation and purification of cerium (III) from concentrate liquor associated with monazite processing by cationic exchange resin as adsorbent. CHEMICAL PAPERS 2023. [DOI: 10.1007/s11696-022-02643-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
AbstractThe present study is directed to find the optimal conditions required for efficient separation and purification of Ce3+ as an analog for lanthanides from Fe3+, Th4+, and Zr4+ (interfering ions) using Amberlite IR120H (AIR120H) resin as a strongly cationic exchange adsorbent. The main factors affecting the separation processes had been investigated and optimized. Ce3+ (Ln3+) as an admixture with Fe3+, Th4+, and Zr4+ was successfully separated by batch and column techniques. The sorption efficiency (S, %) from different acidic media was in this order: HCl > HNO3 > H2SO4. In a quaternary mixture with Fe3+ and Th4+, the maximum separation factor between Ce3+ and Zr4+ was ~ 13 after 90 min of equilibration, and the sorption capacity of AIR120H resin for Ce3+ was 8.2 mg/g. The rate of adsorption was found to follow a pseudo-second-order kinetic model. Separation of the absorbed ions was achieved by desorption processes. Firstly, 98 ± 2% of loaded Ce3+ is fully desorbed by 1 M sodium acetate solution without interfering ions. Moreover, ~ 95% of Zr4+ is desorbed by 1 M citric acid solution. Finally, 85% of loaded Fe3+ and Th4+ ions are desorbed with 8 M HCl solution. The batch technique was applied to separate and purify Ln3+-concentrate in chloride liquor (LnCl3), coming from the caustic digestion of Egyptian high-grade monazite. However, the enhanced radioactivity in LnCl3 due to radium -isotopes (228Ra2+, 226Ra2+, 224Ra2+, 223Ra2+) and radio-lead (210Pb2+) is initially reduced by a factor of 92% (i.e., safe limit) by pH-adjustment. As result, it can be recommended that the sorption process by AIR120H resin is efficient and promising for exploring pure lanthanides from its minerals.
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4
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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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5
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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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6
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Rizk HE, El-Din AMS, Afifi EME, Attallah MF. Potential separation of zirconium and some lanthanides of the nuclear and industrial interest from zircon mineral using cation exchanger resin. J DISPER SCI TECHNOL 2022. [DOI: 10.1080/01932691.2021.1878039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- H. E. Rizk
- Hot laboratories and Waste Management Center (HLWMC), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - A. M. Shahr El-Din
- Hot laboratories and Waste Management Center (HLWMC), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - E. M. El Afifi
- Hot laboratories and Waste Management Center (HLWMC), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Mohamed F. Attallah
- Hot laboratories and Waste Management Center (HLWMC), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
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7
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Eid MA, Abass MR, El-Kenany WM. Fabrication and application of nanosized stannic oxide for sorption of some hazardous metal ions from aqueous solutions. RADIOCHIM ACTA 2022. [DOI: 10.1515/ract-2022-0044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
A batch equilibrium method was utilized to evaluate the retention of Fe(III) and Pb(II) onto stannic oxide (SnO2) nanomaterial. SnO2 was prepared by a simple precipitation method and characterized by different analytical apparatuses like FT-IR, SEM, TEM, and XRD. Scherrer’s formula and Williamson-Hall (WH) analysis were utilized to detect the crystallite size and lattice strain. The XRD and TEM data revealed that SnO2 has a nanoscale and crystalline nature. The retention study for Fe(III) and Pb(II) includes the influence of shaking time, batch factor, pH, initial concentrations, capacity, and applications. The data reveal that the maximum uptake of SnO2 was achieved at pH 2.5 and 3.7 for Fe(III) and Pb(II), respectively. SnO2 has a fast kinetic (60 min) and the reaction kinetic data obey the pseudo–second-order model. The capacity has values of 50.4 and 48.8 mg/g for Fe(III) and Pb(II), respectively. The real sample applications proved that SnO2 is an excellent sorbent for the capture of Pb(II) and Fe(III) from industrial wastewater and low-grade monazite (LGM) respectively, in addition to the capture of 59Fe radionuclide from low-level radioactive waste (LLRW).
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Affiliation(s)
- Marwa Ahmed Eid
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority , 13759 Cairo , Egypt
| | - Mohamed Ragab Abass
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority , 13759 Cairo , Egypt
| | - Wafaa Mohamed El-Kenany
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority , 13759 Cairo , Egypt
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8
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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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9
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Amesh P, Venkatesan KA, Suneesh AS, Chandra M, Gupta DK, Thoguluva RR. Efficient and selective adsorption of U(VI) by succinic acid modified iron oxide adsorbent. RADIOCHIM ACTA 2022. [DOI: 10.1515/ract-2021-1115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The iron oxide surface was modified with succinic acid moiety and the adsorbent obtained, Fe-SUC, was evaluated for the adsorption of U(VI) (Uranium (VI)) from aqueous solution. The Fe-SUC was characterized by FT-IR (Fourier Transform Infrared Spectroscopy), Raman spectroscopy, thermogravimetry, X-ray diffraction, SEM-EDX (Scanning Electron Microscope - Energy-dispersive X-ray Spectroscopy), and particle size analysis. The adsorption behavior of U(VI) on Fe-SUC was studied as a function of pH, contact time, and concentration of U(VI) in the aqueous phase. The adsorption of U(VI) increased with increase in the pH of aqueous phase, and the adsorption saturation occurred at pH = 6. The kinetic data obtained for the adsorption of U(VI) on Fe-SUC were modeled with the pseudo-first-order and pseudo-second-order rate models. Similarly, the U(VI) adsorption isotherm was fitted with Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich adsorption isotherm models. The Langmuir adsorption capacity of U(VI) on Fe-SUC was about ∼176 mg g−1. The selectivity of the adsorbent toward U(VI) was evaluated in the presence of several possible interfering ions. The adsorbed U(VI) was recovered by 0.5 M sodium carbonate solution and the spent adsorbent was tested for its reusability.
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Affiliation(s)
- Pamarthi Amesh
- Reprocessing Research and Development Group, Indira Gandhi Centre for Atomic Research , Kalpakkam 603 102 , India
- Homi Bhabha National Institute , Anushaktinagar , Mumbai , Maharashtra 400094 , India
| | - Konda Athmaram Venkatesan
- Reprocessing Research and Development Group, Indira Gandhi Centre for Atomic Research , Kalpakkam 603 102 , India
- Homi Bhabha National Institute , Anushaktinagar , Mumbai , Maharashtra 400094 , India
| | - Asokan Sudha Suneesh
- Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research , Kalpakkam 603 102 , India
| | - Manish Chandra
- Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research , Kalpakkam 603 102 , India
| | - Deepak K. Gupta
- Materials Science Group, Indira Gandhi Centre for Atomic Research , Kalpakkam 603 102 , India
| | - Ravindran R. Thoguluva
- Materials Science Group, Indira Gandhi Centre for Atomic Research , Kalpakkam 603 102 , India
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10
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Abu Elgoud E, Aly MI, Hamed MM, Nayl AA. NanoTafla Nanocomposite as a Novel Low-Cost and Eco-Friendly Sorbent for Strontium and Europium Ions. ACS OMEGA 2022; 7:10447-10457. [PMID: 35382267 PMCID: PMC8973054 DOI: 10.1021/acsomega.1c07255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 03/03/2022] [Indexed: 06/14/2023]
Abstract
Now the wide use of nanooxides is attributed to their remarkable collection of properties. Nanocomposites have an impressive variety of important applications. A thermal decomposition approach provides a more optimistic method for nanocrystal synthesis due to the low cost, high efficiency, and expectations for large-scale production. Therefore, in this study a new eco-friendly nanooxide composite with sorption characteristics for europium (Eu(III)) and strontium (Sr(II)) was synthesized by a one-step thermal treatment process using earth-abundant tafla clay as a starting material to prepare a modified tafla (M-Taf) nanocomposite. The synthesized nancomposite was characterized by different techniques before and after sorption processes. Different factors that affected the sorption behavior of Eu(III) and Sr(II) in aqueous media by the M-Taf nanocomposite were studied. The results obtained illustrated that the kinetics of sorption of Eu(III) and Sr(II) by the M-Taf nanocomposite are obeyed according to the pseudo-second order and controlled by a Langmuir isotherm model with maximum sorption capacities (Q max) of 25.5 and 23.36 mg/g for Eu(III) and Sr(II), respectively. Also, this novel low-cost and eco-friendly sorbent has promising properties and can be used to separate and retain some radionuclides in different applications.
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Affiliation(s)
- Elsayed
M. Abu Elgoud
- Hot
Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, Cairo 13759, Egypt
| | - Mohamed I. Aly
- Hot
Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, Cairo 13759, Egypt
| | - Mostafa M. Hamed
- Hot
Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, Cairo 13759, Egypt
| | - AbdElAziz A. Nayl
- Department
of Chemistry, College of Science, Jouf University, P.O. Box 2014, Sakaka 42421, Aljouf, Saudi
Arabia
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11
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Canpolat G, Dolak İ, Keçili R, Hussain CG, Amiri A, Hussain CM. Conductive Polymer-Based Nanocomposites as Powerful Sorbents: Design, Preparation and Extraction Applications. Crit Rev Anal Chem 2022; 53:1419-1432. [PMID: 35040725 DOI: 10.1080/10408347.2021.2025334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
Conductive polymers as composite materials have been attracted tremendous attention due to their versatile and excellent features such as tunable conductivity, facile synthesis and fabrication, high chemical and thermal stability etc. These characteristics make them versatile and let them being used in numerous fields including microelectronics, optics and biosensors. Throughout the mentioned fields, conductive polymers particularly perform as effective sorbents. Although tremendous efforts have been put into this topic, to the best of our knowledge, a comprehensive up-to-date review on the applications of conductive polymers as efficient sorbents has not been reported. The main objective of this paper is to make a significant contribution to the recent literature toward the synthesis and extraction applications of conductive polymers as efficient sorbents.
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Affiliation(s)
| | - İbrahim Dolak
- Vocational School of Technical Sciences, Dicle University, Diyarbakır, Turkey
| | - Rüstem Keçili
- Department of Medical Services and Techniques, Yunus Emre Vocational School of Health Services, Anadolu University, Eskişehir, Turkey
| | | | - Amirhassan Amiri
- Department of Chemistry, Ferdowsi University of Mashhad, Mashhad, Iran
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12
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Hamed MM, Sami NM, Aglan RF. Sorbent extraction behavior of cesium and strontium from nitric acid solutions using a new high thermal stability material. Appl Radiat Isot 2021; 180:110058. [PMID: 34922309 DOI: 10.1016/j.apradiso.2021.110058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 11/15/2021] [Accepted: 12/03/2021] [Indexed: 11/02/2022]
Abstract
In this study a new low-cost carbonaceous material was prepared from husks of opuntia-ficus-indica as a starting material (precursor) which was accomplished by chemical activation route using H3PO4 impregnation. The material has been identified by different analytical tools. The sorption performance of Cs(I) and Sr(II) from HNO3 solutions was examined through batch system. Variations of the distribution coefficients (Kd) as a function of HNO3 concentration in the range 0.001-5.0 M were presented. Some of separation probabilities were suggested. The results attained signals that the Sr(II) selectivity is higher than that of Cs(I) at high molarities. The retention capacity (qe) of Cs(I) and Sr(II) ions increased with growing temperature. The capacities at 0.001 M HNO3 are 34 and 108 mg/g for Cs(I) and Sr(II), respectively. Whereas, at 2.0 M HNO3 capacities were about 4 and 37 mg/g for each of Cs(I) and Sr (II), respectively. This studies demonstrates that the prepared carbonaceous sorbent is an economically effective sorbent for retention of Cs(I) and Sr(II) species from HNO3 solutions. Cs(I) and Sr(II) removal potential was tested from simulated low- and intermediate-level radioactive waste samples.
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Affiliation(s)
- Mostafa M Hamed
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, PO.13759, Cairo, Egypt.
| | - N M Sami
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, PO.13759, Cairo, Egypt
| | - Refaat F Aglan
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, PO.13759, Cairo, Egypt
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13
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Gamma Irradiation-Induced Preparation of Polyacrylonitrile Acrylamide Nano-silica for Removal of Some Hazardous Metals. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-021-02156-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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14
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Hassan RS, Abass MR, Eid MA, Abdel-Galil EA. Sorption of some radionuclides from liquid waste solutions using anionic clay hydrotalcite sorbent. Appl Radiat Isot 2021; 178:109985. [PMID: 34678639 DOI: 10.1016/j.apradiso.2021.109985] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/24/2021] [Accepted: 10/11/2021] [Indexed: 11/24/2022]
Abstract
129I and 79Se are potentially important anionic radionuclides in safety assessments due to their high mobility, radiotoxicity, and long half life's (1.7 × 107 and 3.27 × 105 years, respectively). This study is interested in the sorption of 131I and 75Se radionuclides onto magnesium iron hydrotalcite (Mg/Fe HTlc). Mg/Fe HTlc was prepared by co-precipitation technique and characterized using different analytical tools such as FT-IR, XRD, XRF, TGA & DTA, SEM, and BET. Results obtained from this study showed that the adsorption process was a very fast equilibrium time (20 min). The distribution coefficient values as a function of pH have high separation factors for 131I at all different pHs. Reaction kinetic obeys the pseudo-second-order model. Maximum sorption capacity for 131I and 75Se has the values 21.45, and 9.25 mg/g respectively. Sorption isotherms are more relevant to a Langmuir isotherm. The % removal of 131I is decreased by increasing the concentration of competing species. The investigation evidenced that the prepared sorbent is suitable for the removal of 131I and 75Se from radioactive waste and could be considered potential material for purification of effluent polluted with these radionuclides.
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Affiliation(s)
- R S Hassan
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, PO.13759, Cairo, Egypt
| | - M R Abass
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, PO.13759, Cairo, Egypt.
| | - M A Eid
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, PO.13759, Cairo, Egypt
| | - E A Abdel-Galil
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, PO.13759, Cairo, Egypt
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15
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Gamma radiation-induced polymerization of polyacrylic acid-dolomite composite and applications for removal of cesium, cobalt, and zirconium from aqueous solutions. Appl Radiat Isot 2021; 178:109956. [PMID: 34571457 DOI: 10.1016/j.apradiso.2021.109956] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 08/15/2021] [Accepted: 09/16/2021] [Indexed: 11/23/2022]
Abstract
Gamma-irradiation initiated polymerization was utilized to prepare polyacrylic acid dolomite P(AA/D) nanocomposites. Different analytical techniques have been applied to investigate the structure of the new materials. XRD and TEM revealed the crystalline phase with an average particle size ranging from 2 to 4 nm. The ability of the prepared materials to remove cesium, cobalt, and zirconium ions from aqueous solutions was evaluated. The adsorption capacity of studied nanocomposites has an affinity sequence; Zr4+>Co2+≫Cs+ with values 77.8, 72.4, and 34.9 mg/g respectively. The effect of the interfering species reveals that the rate of adsorption of cesium, cobalt, and zirconium ions decreases with increasing concentrations of the interfering species. The investigation proved that the prepared nanocomposite is suitable material for the removal of the studied metals from aqueous solutions and could be considered as potential material for purification of effluent polluted with these metal ions.
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16
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Shahr El-Din AM, Sayed MA, Monir TM, Sami NM, Aly AMI. Sponge-like Ca-alginate/Lix-84 beads for selective separation of Mo(VI) from some rare earth elements. Int J Biol Macromol 2021; 184:689-700. [PMID: 34174304 DOI: 10.1016/j.ijbiomac.2021.06.138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 06/14/2021] [Accepted: 06/20/2021] [Indexed: 11/30/2022]
Abstract
In this investigation, a novel alginate complex was developed for the selective separation of molybdenum (Mo(VI)) ions from some rare earth elements (REEs). In this regard, alginate as a natural polysaccharide was impregnated and modified with 2-hydroxy-5-nonylacetophenone oxime (Lix-84) and characterized using FT-IR, TGA/DTA and SEM-EDX. The relation between medium acidity, adsorption kinetics, sorbent dose, isotherm models, temperature and Mo(VI) recovery was investigated. It was concluded that the impregnation stage promoted the Mo(VI) separation. The kinetics and isotherm data were well-fitted and matched with the pseudo-first-order model and Langmuir isotherm model; respectively. The Langmuir maximum adsorption capacity of Mo(VI) reached 72.2 mg/g. The developed material showed excellent separation performance towards Mo ions over the investigated REEs. The desorption and recovery of the loaded Mo(VI) ions were achieved using 1.0 M HCl. Reutilization of Alg/Lix-84 was confirmed up to three adsorption-desorption cycles with no damage of the beads as proved with SEM analysis. The adsorption mechanism of molybdenum onto Alg/Lix-84 was elucidated through FTIR and XPS measurements and was found to be governed by both electrostatic interaction and ion exchange. Therefore, the developed material has a promising potential for the selective separation of molybdenum from REEs-containing solution.
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Affiliation(s)
| | - Moubarak A Sayed
- Hot Lab. Center, Egyptian Atomic Energy Authority, 13759 Cairo, Egypt; Central Lab. for Elemental and Isotopic Analysis, Nuclear Research Center, Egyptian Atomic Energy Authority, Inshas, Cairo, Egypt
| | - Tarek M Monir
- Hot Lab. Center, Egyptian Atomic Energy Authority, 13759 Cairo, Egypt
| | - Nesreen M Sami
- Hot Lab. Center, Egyptian Atomic Energy Authority, 13759 Cairo, Egypt
| | - Amal M I Aly
- Hot Lab. Center, Egyptian Atomic Energy Authority, 13759 Cairo, Egypt
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17
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Masry BA, Shahr El-Din AM, Al-Aidy HA. Ceric-ions redox initiating technique for Zirconium and Niobium separation through graft copolymerization of natural polysaccharides. SEP SCI TECHNOL 2021. [DOI: 10.1080/01496395.2021.1919708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Botros A. Masry
- Hot Laboratories and Waste Management Centre, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Ahmed M. Shahr El-Din
- Hot Laboratories and Waste Management Centre, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Hend A. Al-Aidy
- Petrochemicals Department, Polymers Lab, Egyptian Petroleum Research Institute, Nasr City, Egypt
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Kasem AE, Abdel-Galil EA, Belacy N, Badawy NA. Kinetics and adsorption equilibrium of some radionuclides on polyaniline/SiO 2 composite. RADIOCHIM ACTA 2021. [DOI: 10.1515/ract-2020-0014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The sorption kinetics and equilibrium isotherms of zirconium, uranium, and molybdenum ions onto synthetic polyaniline/SiO2 composite (PAn/SiO2) have been studied using batch-sorption techniques. This study was carried out to examine the sorption behavior of the PAn/SiO2 for the removal of Zr(IV), U(VI), and Mo(VI) ions from an aqueous solution. The influence of some parameters on the sorption process was also studied. The maximum sorption for Zr(IV), U(VI), and Mo(VI) ions was achieved at 60 min shaking time. Langmuir isotherm model is the most representative for discussing the sorption process with a maximum sorption capacity of 24.26, 21.82, and 13.01 mg/g for Zr(IV), U(VI), and Mo(VI) ions, respectively. Kinetic modeling revealed that the sorption of all ions follows the pseudo-second-order kinetic model. The results demonstrated that both the external and intra-particular diffusion are taken into account in determining the sorption rate. Thermodynamic parameters like ΔG°, ΔH°, and ΔS° for the sorption process were evaluated. The synthetic composite has been successfully applied for the removal and recovery of U(VI) ions from real solution (monazite leachate) using a chromatographic column packed with PAn/SiO2 composite with a breakthrough capacity equal to 239.70 mg/g.
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Affiliation(s)
- Abeer E. Kasem
- Hot Laboratories and Waste Management Center , Atomic Energy Authority , 13759, Cairo , Egypt
| | - Ezzat A. Abdel-Galil
- Hot Laboratories and Waste Management Center , Atomic Energy Authority , 13759, Cairo , Egypt
| | - Nabil Belacy
- Hot Laboratories and Waste Management Center , Atomic Energy Authority , 13759, Cairo , Egypt
| | - Nagwa A. Badawy
- Faculty of Science, Girls Branch , Al-Azhar University , Cairo , Egypt
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Abdel-Galil EA, Eid MA, Shahr El-Din AM. Adsorptive removal of PAR and Arsenazo-III from radioactive waste solutions by modified sugarcane bagasse as eco-friendly sorbent. RADIOCHIM ACTA 2020. [DOI: 10.1515/ract-2020-0022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In this paper, sugarcane bagasse (SCB) was modified using phosphoric acid. The modified sugarcane bagasse (MSCB) has been used to remove 4-(2-pyridylazo)resorcinol (PAR) and Arsenazo-III (Ar-III) from liquid radioactive waste. The surface morphology and functional groups of the MSCB were studied using scanning electron microscopy (SEM), X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). Adsorption ability of MSCB has been tested by batch mode through some relevant factors like initial pH, reaction time, initial coloring reagents (PAR and Ar-III) concentrations, and adsorbent weight. At adsorption equilibrium time 180 min and pH values of 3 and 1 for PAR and Ar-III; the maximum removal (%) for both PAR and Ar-III were 93 and 57%, respectively. The adsorption isotherm data are representative well to Freundlich isotherm model. The mean free energy of adsorption, E (kJ/mol), has been estimated as 5.75 and 2.28 kJ/mol for PAR and Ar-III, respectively, which suggests that the adsorption occurred physically. The maximum adsorption capacity of MSCB for PAR and Ar-III is 96.62 and 15.18 mg/g, respectively. The adsorption kinetics are better fitted by the pseudo-second-order model. The partial film along with intra-particle diffusion controlled the diffusion of coloring reagents from the solution bulk to the particle interior pores. Application of MSCB for removing PAR and Ar-III from simulated liquid radioactive waste containing U(VI) and Th(VI) ions has been achieved successfully.
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Affiliation(s)
- Ezzat A. Abdel-Galil
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority , P.O. Box 13759 , Cairo , Egypt
| | - Marwa A. Eid
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority , P.O. Box 13759 , Cairo , Egypt
| | - Ahmed M. Shahr El-Din
- Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority , P.O. Box 13759 , Cairo , Egypt
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20
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Removal of strontium radionuclides from liquid scintillation waste and environmental water samples. Appl Radiat Isot 2020; 166:109357. [PMID: 32755756 DOI: 10.1016/j.apradiso.2020.109357] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 07/14/2020] [Accepted: 07/22/2020] [Indexed: 11/20/2022]
Abstract
Strontium-90 (t1/2 = 29 y) is one of the most concerned isotopes in both nuclear accidents and reprocessing of nuclear fuel. In this study, the removal of strontium using low cost and valuable Dowex-HCR-S/S (DHS) resin was achieved. The kinetic and equilibrium sorption studies have been investigated using batch technique. The results of kinetic studies showed that the pseudo-second-order kinetic model was found to correlate well with the experimental data. Equilibrium data were also analyzed by sorption isotherm models indicating that the monolayer capacity of Sr(II) at equilibrium is 400.0 mg/g. It was concluded that resin has an efficient sorption capacity compared to many sorbents. The thermodynamic parameters of the removal (ΔHo, ΔSo, and ΔGo) were also determined. The removal process was endothermic and spontaneous. The resin has been successfully applied for the removal of 85Sr from organic liquid scintillator waste and some environmental waters such as tap water, river water, sea water and ground water samples. The present work concludes that the low-cost and commercial DHS resin used under these conditions has a major possibility as an efficacious material for the removal of 90Sr from environmental and real radioactive wastewaters. It can therefore have a site in the treatment of radioactive liquid waste because it is of an affordable and commercially available retention material.
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Taghizadeh A, Taghizadeh M, Jouyandeh M, Yazdi MK, Zarrintaj P, Saeb MR, Lima EC, Gupta VK. Conductive polymers in water treatment: A review. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113447] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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22
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Monir T, Shahr El-Din A, El-Nadi Y, Ali A. A novel ionic liquid-impregnated chitosan application for separation and purification of fission 99Mo from alkaline solution. RADIOCHIM ACTA 2020. [DOI: 10.1515/ract-2019-3202] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In this investigation, a novel application of Aliquat 336 (tricaprylmethylammonium chloride)-impregnated chitosan (AICS) for the separation and purification of 99Mo from some fission products, such as 137Cs, 85Sr and 131I, in alkaline solution is presented. Before impregnation, pristine chitosan experienced no adsorption affinity for Mo. However, this situation dramatically changed after the impregnation. The structure of AICS was elucidated by FTIR, SEM and EDX spectra. The influence of contact time, solution pH, weight of AICS, initial Mo concentration and temperature on the adsorption process was studied. Kinetic studies revealed that the rate of adsorption was impressively very fast and only 3 min were sufficient to reach equilibrium. The pH influence showed that Mo could be effectively adsorbed over a wide range of pH 3–11. The equilibrium data fitting to isotherms models followed the order Langmuir > Freundlich > Dubinin-Radushkevich. Based on the Langmuir model, the maximum adsorption capacity was computed at 60.1 mg/L. Thermodynamic studies indicated that the adsorption process is spontaneous and endothermic in nature. Finally, a pure solution of 99Mo with a purity >99 % was obtained from a real sample. The data obtained confirmed that AICS is a promising candidate for separation and purification of 99Mo from alkaline media.
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Affiliation(s)
- Tarek Monir
- Hot Laboratories Center, Atomic Energy Authority , 13759 Cairo , Egypt
| | | | - Yasser El-Nadi
- Hot Laboratories Center, Atomic Energy Authority , 13759 Cairo , Egypt
| | - Amal Ali
- Hot Laboratories Center, Atomic Energy Authority , 13759 Cairo , Egypt
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Abdel-Galil EA, Tourky AS, Kasem AE. Sorption of some radionuclides from nuclear waste effluents by polyaniline/SiO 2 composite: Characterization, thermal stability, and gamma irradiation studies. Appl Radiat Isot 2020; 156:109009. [PMID: 32056689 DOI: 10.1016/j.apradiso.2019.109009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/20/2019] [Accepted: 11/25/2019] [Indexed: 01/09/2023]
Abstract
Polyaniline/SiO2 composite was successfully prepared via in situ polymerization using polyvinyl alcohol as a surfactant. The prepared PAn/SiO2 composite was used for the removal of Zr(IV), U(VI), and Mo(VI) ions from their liquid solutions. PAn/SiO2 composite was characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The synthesized composite was irradiated with γ-radiation from a Co-60 radioactive source with absorbed dose 50, 100, and 150 kGy and the corresponding changes in structural properties of the composites were studied. The thermal and radiation stabilities of PAn/SiO2 composite in terms of saturation capacities were studied. PAn/SiO2 composite has a good thermal stability as it retained about 78.83% of its saturation capacity upon heating at 400±1 °C, while the saturation capacity of PAn/SiO2 composite was increased from 191.28 to 319.16 mg/g for Zr(IV) with varying the irradiated doses from 0 to 150 kGy. The sorption studies for several metal ions revealed marked selectivity of PAn/SiO2 composite towards Zr(IV), U(VI), and Mo(VI) ions with selectivity order; Zr(IV) > U(VI) > Mo(VI). The results indicated that PAn/SiO2 composite removed 95.33, 75.97, and 52.87% from Zr(IV), U(VI), and Mo(VI) ions, respectively at pH 3.26. Hence, analytical utility of PAn/SiO2 composite was accomplished by performing some quantitative separation such as separation of U(VI) ions from monazite leachate and separation of Zr(IV), U(VI), and Mo(VI) ions from simulated liquid waste. Thermodynamic parameter studies concluded that the adsorption of Zr(IV), U(VI), and Mo(VI) ions was spontaneous and endothermic in nature.
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Affiliation(s)
- E A Abdel-Galil
- Hot Laboratories and Waste Management Center, Atomic Energy Authority, 13759, Cairo, Egypt.
| | - A S Tourky
- Faculty of Science, Girls Branch, Al-Azhar University, Cairo, Egypt
| | - A E Kasem
- Hot Laboratories and Waste Management Center, Atomic Energy Authority, 13759, Cairo, Egypt
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