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Zhang B, Zhu W, Hou R, Yue Y, Feng J, Ishag A, Wang X, Qin Y, Sun Y. Recent advances of application of bentonite-based composites in the environmental remediation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 362:121341. [PMID: 38824894 DOI: 10.1016/j.jenvman.2024.121341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 05/11/2024] [Accepted: 05/30/2024] [Indexed: 06/04/2024]
Abstract
Bentonite-based composites have been widely utilized in the removal of various pollutants due to low cost, environmentally friendly, ease-to-operate, whereas the recent advances concerning the application of bentonite-based composites in environmental remediation were not available. Herein, the modification (i.e., acid/alkaline washing, thermal treatment and hybrids) of bentonite was firstly reviewed; Then the recent advances of adsorption of environmental concomitants (e.g., organic (dyes, microplastics, phenolic and other organics) and inorganic pollutants (heavy metals, radionuclides and other inorganic pollutants)) on various bentonite-based composites were summarized in details. Meanwhile, the effect of environmental factors and interaction mechanism between bentonite-based composites and contaminants were also investigated. Finally, the conclusions and prospective of bentonite-based composites in the environmental remediation were proposed. It is demonstrated that various bentonite-based composites exhibited the high adsorption/degradation capacity towards environmental pollutants under the specific conditions. The interaction mechanism involved the mineralization, physical/chemical adsorption, co-precipitation and complexation. This review highlights the effect of different functionalization of bentonite-based composites on their adsorption capacity and interaction mechanism, which is expected to be helpful to environmental scientists for applying bentonite-based composites into practical environmental remediation.
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Affiliation(s)
- Bo Zhang
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China; Research Center of Applied Geology of China Geological Survery, Chengdu, 610036, PR China
| | - Weiyu Zhu
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China
| | - Rongbo Hou
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China
| | - Yanxue Yue
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China
| | - Jiashuo Feng
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China
| | - Alhadi Ishag
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China; Department of Chemical Engineering, Faculty of Engineering and Technical Studies, University of Kordofan, El Obeid, 51111, Sudan
| | - Xiao Wang
- Research Center of Applied Geology of China Geological Survery, Chengdu, 610036, PR China
| | - Yan Qin
- Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, 100037, PR China.
| | - Yubing Sun
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China.
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Sarkar P, Ghimire S, Vlasov S, Mukhopadhyay K. Effect of clay-zwitterionic interactions in controlling the viscoelastic properties in organomodified clays. iScience 2023; 26:108388. [PMID: 38047072 PMCID: PMC10690574 DOI: 10.1016/j.isci.2023.108388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 10/06/2023] [Accepted: 10/31/2023] [Indexed: 12/05/2023] Open
Abstract
Investigating the rheology of 2D materials such as clays is of growing interest in various applications as it dictates their flowability and structural stability. Clay minerals present unique rheological properties, especially when in suspension. This study explores the effect of functionalizing bentonite clay with betaines of variable carbon chain lengths on the rheological properties of clay slurries to analyze their interactions in suspension. The results show that these zwitterion-functionalized clays exhibit higher viscosity, storage moduli, and flow stresses due to the formation of three-dimensional networks and increased aggregation caused by intercalation. The structural properties of the clay slurries are also found to be pH-sensitive. Additionally, XRD and SEM analyses support the proposed intercalation of the clays. The findings suggest the potential application of small-chain betaine functionalized clays in engineering and energy applications. Overall, this study provides insight into predicting the stability and strength of functionalized clay suspensions.
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Affiliation(s)
- Pritha Sarkar
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Suvash Ghimire
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Sergey Vlasov
- Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA
| | - Kausik Mukhopadhyay
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA
- Advanced Materials Processing and Analysis Centre, University of Central Florida, Orlando, FL 32816, USA
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Man GT, Albu PC, Nechifor AC, Grosu AR, Tanczos SK, Grosu VA, Ioan MR, Nechifor G. Thorium Removal, Recovery and Recycling: A Membrane Challenge for Urban Mining. MEMBRANES 2023; 13:765. [PMID: 37755188 PMCID: PMC10538078 DOI: 10.3390/membranes13090765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 08/16/2023] [Accepted: 08/24/2023] [Indexed: 09/28/2023]
Abstract
Although only a slightly radioactive element, thorium is considered extremely toxic because its various species, which reach the environment, can constitute an important problem for the health of the population. The present paper aims to expand the possibilities of using membrane processes in the removal, recovery and recycling of thorium from industrial residues reaching municipal waste-processing platforms. The paper includes a short introduction on the interest shown in this element, a weak radioactive metal, followed by highlighting some common (domestic) uses. In a distinct but concise section, the bio-medical impact of thorium is presented. The classic technologies for obtaining thorium are concentrated in a single schema, and the speciation of thorium is presented with an emphasis on the formation of hydroxo-complexes and complexes with common organic reagents. The determination of thorium is highlighted on the basis of its radioactivity, but especially through methods that call for extraction followed by an established electrochemical, spectral or chromatographic method. Membrane processes are presented based on the electrochemical potential difference, including barro-membrane processes, electrodialysis, liquid membranes and hybrid processes. A separate sub-chapter is devoted to proposals and recommendations for the use of membranes in order to achieve some progress in urban mining for the valorization of thorium.
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Affiliation(s)
- Geani Teodor Man
- Analytical Chemistry and Environmental Engineering Department, University Politehnica of Bucharest, 011061 Bucharest, Romania; (G.T.M.); (A.C.N.); (A.R.G.)
- National Research and Development Institute for Cryogenics and Isotopic Technologies—ICSI, 240050 Râmnicu Valcea, Romania
| | - Paul Constantin Albu
- Radioisotopes and Radiation Metrology Department (DRMR), IFIN Horia Hulubei, 023465 Măgurele, Romania; (P.C.A.); (M.-R.I.)
| | - Aurelia Cristina Nechifor
- Analytical Chemistry and Environmental Engineering Department, University Politehnica of Bucharest, 011061 Bucharest, Romania; (G.T.M.); (A.C.N.); (A.R.G.)
| | - Alexandra Raluca Grosu
- Analytical Chemistry and Environmental Engineering Department, University Politehnica of Bucharest, 011061 Bucharest, Romania; (G.T.M.); (A.C.N.); (A.R.G.)
| | - Szidonia-Katalin Tanczos
- Department of Bioengineering, University Sapientia of Miercurea-Ciuc, 500104 Miercurea Ciuc, Romania;
| | - Vlad-Alexandru Grosu
- Department of Electronic Technology and Reliability, Faculty of Electronics, Telecommunications and Information Technology, University Politehnica of Bucharest, 061071 Bucharest, Romania
| | - Mihail-Răzvan Ioan
- Radioisotopes and Radiation Metrology Department (DRMR), IFIN Horia Hulubei, 023465 Măgurele, Romania; (P.C.A.); (M.-R.I.)
| | - Gheorghe Nechifor
- Analytical Chemistry and Environmental Engineering Department, University Politehnica of Bucharest, 011061 Bucharest, Romania; (G.T.M.); (A.C.N.); (A.R.G.)
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Alotaibi AM, Ismail AF, Aziman ES. Ultra-effective modified clinoptilolite adsorbent for selective thorium removal from radioactive residue. Sci Rep 2023; 13:9316. [PMID: 37291241 DOI: 10.1038/s41598-023-36487-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 06/05/2023] [Indexed: 06/10/2023] Open
Abstract
This study investigated the efficacy of using phosphate-modified zeolite (PZ) as an adsorbent for removing thorium from aqueous solutions. The effects of various factors such as contact time, adsorbent mass, initial thorium concentration, and pH value of the solution on the removal efficiency were analyzed using the batch technique to obtain optimum adsorption condition. The results revealed that the optimal conditions for thorium adsorption were a contact time of 24 h, 0.03 g of PZ adsorbent, pH 3, and a temperature of 25 °C. Isotherm and kinetics parameters of the thorium adsorption on PZ were also determined, with equilibrium studies showing that the experimental data followed the Langmuir isotherm model. The maximum adsorption capacity (Qo) for thorium was found to be 17.3 mg/g with the Langmuir isotherm coefficient of 0.09 L/mg. Using phosphate anions to modify natural zeolite increased its adsorption capacity. Furthermore, adsorption kinetics studies demonstrated that the adsorption of thorium onto PZ adsorbent fitted well with the pseudo-second-order model. The applicability of the PZ adsorbent in removing thorium from real radioactive waste was also investigated, and nearly complete thorium removal was achieved (> 99%) from the leached solution obtained from cracking and leaching processes of rare earth industrial residue under optimized conditions. This study elucidates the potential of PZ adsorbent for efficient removal of thorium from rare earth residue via adsorption, leading to a reduction in waste volume for ultimate disposition.
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Affiliation(s)
- Abdulrahman Masoud Alotaibi
- Nuclear Science Programme, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM, 43600, Bangi, Selangor, Malaysia
- Department of Physics, Faculty of Applied Science, Umm Al-Qura University, Makkah, 21955, Saudi Arabia
| | - Aznan Fazli Ismail
- Nuclear Science Programme, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM, 43600, Bangi, Selangor, Malaysia.
- Nuclear Technology Research Centre, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM, 43600, Bangi, Selangor, Malaysia.
| | - Eli Syafiqah Aziman
- Nuclear Science Programme, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM, 43600, Bangi, Selangor, Malaysia
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Gumber N, Pai RV, Bahadur J, Sengupta S, Das D, Goutam UK. γ-Resistant Microporous CAU-1 MOF for Selective Remediation of Thorium. ACS OMEGA 2023; 8:12268-12282. [PMID: 37033815 PMCID: PMC10077452 DOI: 10.1021/acsomega.2c08274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 03/08/2023] [Indexed: 06/19/2023]
Abstract
A simple solvothermal method was used to synthesize a metal-organic framework (MOF) with an Al metal entity, viz., CAU-1 NH2. The synthesized MOF was characterized using different techniques like X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy (SEM), field emission SEM (FE-SEM), transmission electron microscopy, small-angle X-ray scattering, positron annihilation lifetime spectroscopy, and X-ray photoelectron spectroscopy. The radiation stability was evaluated by irradiating the material up to a cumulative dose of 2 MGy using 60Co for the first time. The studies showed a remarkable gamma irradiation stability of the material up to 1 MGy. The porosity and surface area of the synthesized MOF were determined by Brunauer-Emmett-Teller, which showed a high specific surface area of 550 m2/g. The pH dependence study of Th uptake from an aqueous solution was performed from pH 2-8, followed by adsorption isotherm and adsorption kinetics studies. These results revealed that the Langmuir and pseudo-second-order kinetic models can be well adapted for understanding the Th uptake and kinetics, respectively. The synthesized MOF exhibited an ∼404 mg/g thorium adsorption capacity. Selectivity studies of adsorption of Th w.r.t. to U and different metal ions such as Cu, Co, Ni, and Fe showed that Th gets adsorbed preferentially as compared to other metal ions. In addition, the MOF could be used multiple times without much deterioration.
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Affiliation(s)
- Nitin Gumber
- Fuel
Chemistry Division, Bhabha Atomic Research
Centre, Mumbai 400085, India
- Homi Bhabha
National Institute, Anushaktinagar, Mumbai 400094, India
| | - Rajesh V. Pai
- Fuel
Chemistry Division, Bhabha Atomic Research
Centre, Mumbai 400085, India
- Homi Bhabha
National Institute, Anushaktinagar, Mumbai 400094, India
| | - Jitendra Bahadur
- Solid
State Physics Division, Bhabha Atomic Research
Centre, Mumbai 400085, India
- Homi Bhabha
National Institute, Anushaktinagar, Mumbai 400094, India
| | - Somnath Sengupta
- Material
Chemistry and Metal Fuel Cycle Group, Indira
Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu 603102, India
| | - Debarati Das
- Radiochemistry
Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha
National Institute, Anushaktinagar, Mumbai 400094, India
| | - Uttam Kumar Goutam
- Technical
Physics Division, Bhabha Atomic Research
Centre, Mumbai 400085, India
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Petrounias P, Rogkala A, Giannakopoulou PP, Pyrgaki K, Lampropoulou P, Koutsovitis P, Tsikos H, Pomonis P, Koukouzas N. Sustainable removal of uranium from acidic wastewater using various mineral raw materials. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 330:117159. [PMID: 36586366 DOI: 10.1016/j.jenvman.2022.117159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 12/24/2022] [Accepted: 12/25/2022] [Indexed: 06/17/2023]
Abstract
Various types of plutonic and volcanic rocks and their alteration products from Greece (serpentinite, magnesite and andesite), have been used for sustainable removal of Uranium (U) from the acidic drainage of Kirki mine, as well as for the pH increase of the polluted solutions. In this light, this study aims at the further understanding and improvement of the ecofriendly reuse of sterile, natural raw materials (including those remaining through industrial processing and engineering testing of aggregate rocks), for remediation of acid mine drainage. The selected rocks constitute such residues of sterile materials were used as filters in experimental continuous flow devices in the form of batch-type columns, in order to investigate acidic remediation properties with special focus on U removal. The initial pH of the wastewater was 2.90 and increased after seven (7) days of experimental application and more specifically from the fourth day onwards. Uranium removal became quantitatively significant once pH reached the value of 5.09. The volcanic rocks appeared to be more effective for U removal than the plutonic ones because of microtextural differences. However, optimum U removal was mainly achieved by serpentinite: while the raw materials rich in Mg strongly reacted and remediated the pH of the drainage water waste. Furthermore, the increase of pH values due to the presence of mineral raw materials, provided increased oxidation potential which deactivated the toxic load of metals, particularly U. Consequently, batch-type serpentinite reaction with the tailing fluid caused a drop in U concentration from an initial value of 254 ppb to the one of 8 ppb, which corresponds to 97% of removal. Andesite presented the second best reactant for experimental remediation, especially when it was mixed with magnetically separated mineral fractions. Despite the fact that the proposed methodology is currently at a relatively low Technology Readiness Level (TRL), it carries the potential to become an extremely effective and low-cost alternative to conventional environmental restoration technologies.
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Affiliation(s)
- Petros Petrounias
- Section of Earth Materials, Department of Geology, University of Patras, 265 04, Patras, Greece; Chemical Process & Energy Resources Institute, Centre for Research & Technology Hellas (CERTH), Greece.
| | - Aikaterini Rogkala
- Section of Earth Materials, Department of Geology, University of Patras, 265 04, Patras, Greece
| | | | - Konstantina Pyrgaki
- Chemical Process & Energy Resources Institute, Centre for Research & Technology Hellas (CERTH), Greece
| | - Paraskevi Lampropoulou
- Section of Earth Materials, Department of Geology, University of Patras, 265 04, Patras, Greece
| | - Petros Koutsovitis
- Section of Earth Materials, Department of Geology, University of Patras, 265 04, Patras, Greece
| | - Harilaos Tsikos
- Section of Earth Materials, Department of Geology, University of Patras, 265 04, Patras, Greece
| | - Panagiotis Pomonis
- Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimioupolis Zografou, 15784, Athens, Greece
| | - Nikolaos Koukouzas
- Chemical Process & Energy Resources Institute, Centre for Research & Technology Hellas (CERTH), Greece
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Investigations of applicability of sulfonated-GMA-g-non-woven PE adsorbent for the efficient removal of uranium from aqueous solutions. J Radioanal Nucl Chem 2023. [DOI: 10.1007/s10967-023-08802-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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8
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Hu Y, Ding J, Ren G, Jin T, Liu Z, Qian Y. Highly efficient extraction of thorium from aqueous solution by 2-carboxyethylphosphonic acid-functionalized chitosan xerogel. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Hamza MF, Abu Khoziem HA, Khalafalla MS, Abdellah WM, Zaki DI, Althumayri K, Wei Y. Ecofriendly Composite as a Promising Material for Highly-Performance Uranium Recovery from Different Solutions. TOXICS 2022; 10:490. [PMID: 36136455 PMCID: PMC9502357 DOI: 10.3390/toxics10090490] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/16/2022] [Accepted: 08/18/2022] [Indexed: 06/16/2023]
Abstract
The development of new materials based on biopolymers (as renewable resources) is substantial for environmental challenges in the heavy metal and radionuclide ions removal contaminations. Functionalization of chitosan with sulfonic groups was achieved for improving the uranium sorption, not only from slightly acidic leachate, but also for the underground water. The prepared hydrogel based on chitosan was characterized by series of analysis tools for structure elucidation as FTIR spectroscopy, textural properties using nitrogen adsorption method, pHPZC (by pH-drift method), thermogravimetric analysis (TGA), SEM, and SEM-EDX analyses. The sorption was performed toward uranium (VI) ions for adjustment of sorption performances. The optimum sorption was performed at pH 4 (prior to the precipitation pH). The total sorption was achieved within 25 min (relatively fast kinetics) and was fitted by pseudo-first order rate equation (PFORE) and resistance to intraparticle diffusion equation (RIDE). The maximum sorption capacity was around 1.5 mmol U g-1. The sorption isotherms were fitted by Langmuir and Sips equations. Desorption was achieved using 0.3 M HCl solution and the complete desorption was performed in around 15 min of contact. The sorption desorption cycles are relatively stable during 5 cycles with limit decreasing in sorption and desorption properties (around 3 ± 0.2% and 99.8 ± 0.1%, respectively). The sorbent was used for removal of U from acid leachate solution in mining area. The sorbent showed a highly performance for U(VI) removal, which was considered as a tool material for radionuclides removing from aquatic medium.
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Affiliation(s)
- Mohammed F. Hamza
- School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
- Nuclear Materials Authority, POB 530, El-Maadi, Cairo 11728, Egypt
| | | | | | | | - Doaa I. Zaki
- Nuclear Materials Authority, POB 530, El-Maadi, Cairo 11728, Egypt
| | - Khalid Althumayri
- Department of Chemistry, College of Science, Taibah University, Al-Madinah Al-Munawarah 30002, Saudi Arabia
| | - Yuezhou Wei
- School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
- School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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A comparative investigation of uranium and thorium adsorption behavior on amidoximated copolymeric hydrogel. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08250-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractThis work focuses on investigating the feasibility of using a crosslinked amidoximated copolymeric hydrogel as a potential adsorbent to recover uranium and thorium ions from aqueous media. The hydrogel was synthesized via gamma-irradiation copolymerization and characterized through FTIR, TGA, and SEM. The medium acidity notably affected the adsorption capacity of both ions. The adsorption data was in line with the pseudo-1st-order equation and the Freundlich isothermal model. The thermodynamics analysis showed that the temperature rise promoted the adsorption capacity. The reusability studies highlighted the good performance of the hydrogel up to five regeneration rounds.
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Characterization, Structure, Dielectric Permittivity, and AC Conductivity of Co–Ni-Doped Bentonite at Room Temperature. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2022. [DOI: 10.1007/s13369-021-05419-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Elashry SM, Labib S, Attallah MF. Sorption behavior of natural uranium from aqueous solutions using modified activated carbon with quinoline. RADIOCHIM ACTA 2021. [DOI: 10.1515/ract-2021-1071] [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 activated carbon (AC) was modified by molecules of quinoline (Q) and the new prepared AC impregnated by Q was characterized using Fourier transform infrared (FTIR), Raman spectroscopy, surface measurements, scanning electron microscope (SEM) and transmission electron microscope (TEM). These analytical techniques demonstrated a successful preparation of AC-Q as a new material which was examined for its sorption behavior for natural uranium. The sorption results by batch mode indicated the optimum conditions for 94.5% removal of U(VI) ions at pH 4.7 and an equilibrium contact time of 90 min. The analysis of sorption data revealed that the pseudo-second-order and Langmuir were more fitted than other estimated models. The sorption capacity of U(VI) was ∼63 mg/g onto AC-Q as adsorbent martial. The thermodynamic data demonstrated that the sorption of uranium is endothermic and spontaneous. New mechanism was supposed based on the role of the abrasive material quinoline on the mechanical removal of uranium from aqueous solution.
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Affiliation(s)
- Soaad M. Elashry
- Isotopes Geology Department , Researches Sector, Nuclear Materials Authority , 530 Katamia , Cairo , Egypt
| | - Shiraz Labib
- Nuclear Chemistry Department , Hot Laboratories Center, Egyptian Atomic Energy Authority , 13759 Abu Zaabal , Cairo , Egypt
| | - Mohamed F. Attallah
- Analytical Chemistry and Control Department , Hot Laboratories Center, Egyptian Atomic Energy Authority , 13759 Abu Zaabal , Cairo , Egypt
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Sharma P, Yadav V, Kumari S, Ghosh D, Rawat P, Vij A, Srivastava C, Saini S, Sharma V, Hassan MI, Majumder S. Deciphering the potent application of nanobentonite and α-Fe2O3/bentonite nanocomposite in dye removal: revisiting the insights of adsorption mechanism. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-021-01927-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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Alahabadi A, Singh P, Raizada P, Anastopoulos I, Sivamani S, Dotto GL, Landarani M, Ivanets A, Kyzas GZ, Hosseini-Bandegharaei A. Activated carbon from wood wastes for the removal of uranium and thorium ions through modification with mineral acid. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125516] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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15
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Phosphogypsum and Black Steel Slag as Additives for Ecological Bentonite-Based Materials: Microstructure and Characterization. MINERALS 2020. [DOI: 10.3390/min10121067] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The Black Steel slag (Ss) and phosphogypsum (PG) are industrial wastes produced in Morocco. In order to reduce these two wastes and to evaluate their pozzolanic reactivity in the presence of water, they were incorporated into bentonite (B) mixed with lime (L). The studied mixtures (BLW, BL–PG–W and BL–PG–Ss–W) were analyzed by X-ray diffraction, Infrared spectroscopy, Raman spectroscopy and SEM/EDX analysis. Compressive strength tests were performed on hardened specimens. The results obtained show that the hydration kinetics of the B–L–W and B–L–PG–W mixtures are slow. The addition of PG to a bentonite––lime mixture induces the formation of new microstructures such as hydrated calcium silicate (C–S–H) and ettringite, which increases the compressive strength of the cementitious specimens. The addition of the Ss to a mixture composed of 8%PG and 8%L–B accelerates the kinetics of hydration and activates the pozzolanic reaction. The presence of C2S in the slag helps to increase the mechanical strength of the mixture B–L–PG–Ss. The compressive strength of the mixtures BL–W, BL–PG–W and BL–PG–Ss–W increases from 15 to 28 days of setting. After 28 days of setting, 8% of Sc added to the mixture 8% PG–8%L–B is responsible for an increase of the compressive strength to 0.6 MPa.
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