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Lu Y, Yu Z, Zhang T, Pan D, Dai J, Li Q, Tao Z, Xiao X. A Cucurbit[8]uril-Based Supramolecular Framework Material for Reversible Iodine Capture in the Vapor Phase and Solution. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308175. [PMID: 38032163 DOI: 10.1002/smll.202308175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 11/04/2023] [Indexed: 12/01/2023]
Abstract
The safe and efficient management of hazardous radioactive iodine is significant for nuclear waste reprocessing and environmental industries. A novel supramolecular framework compound based on cucurbit[8]uril (Q[8]) and 4-aminopyridine (4-AP) is reported in this paper. In the single crystal structure of Q[8]-(4-AP), two 4-AP molecules interact with the outer surface of Q[8] and the two other 4-AP molecules are encapsulated into the Q[8] cavity to form the self-assembly Q[8]-(4-AP). Iodine adsorption experiments show that the as-prepared Q[8]-(4-AP) not only has a high adsorption capacity (1.74 g· g-1) for iodine vapor but also can remove the iodine in the organic solvent and the aqueous solution with the removal efficiencies of 95% and 91%, respectively. The presence of a large number of hydrogen bonds between the iodine molecule and the absorbent, as seen in the single crystal structure of iodine-loaded Q[8]-(4-AP) (I2@Q[8]-(4-AP)), is thought to be responsible for the exceptional iodine adsorption capacity of the material. In addition, the adsorption-desorption tests reveal that the self-assembly material has no significant loss of iodine capture capacity after five cycles, indicating that it has sufficient reusability.
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Affiliation(s)
- Yun Lu
- National Key Laboratory of Green Pesticide, State Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, 550025, China
| | - Zhichao Yu
- National Key Laboratory of Green Pesticide, State Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, 550025, China
| | - Tingting Zhang
- National Key Laboratory of Green Pesticide, State Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, 550025, China
| | - Dingwu Pan
- National Key Laboratory of Green Pesticide, State Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, 550025, China
| | - Jingjing Dai
- National Key Laboratory of Green Pesticide, State Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, 550025, China
| | - Qing Li
- National Key Laboratory of Green Pesticide, State Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, 550025, China
| | - Zhu Tao
- National Key Laboratory of Green Pesticide, State Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, 550025, China
| | - Xin Xiao
- National Key Laboratory of Green Pesticide, State Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, 550025, China
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Park CW, Jeong E, Yang HM, Kim HJ. Helical magnetic micromotors decorated with nickel ferrocyanide for the active and rapid adsorption of radiocesium in water. CHEMOSPHERE 2024; 346:140668. [PMID: 37949179 DOI: 10.1016/j.chemosphere.2023.140668] [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: 08/29/2023] [Revised: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 11/12/2023]
Abstract
Separating radioactive cesium from nuclear waste and contaminated environments is critical to mitigate radiological hazards. In response to this need, remote-controllable and Cs-selective micromotor adsorbents have been considered as a promising technology for rapid in-situ cleanup while minimizing secondary waste and radiation exposure to workers. In this study, we demonstrate the active and rapid removal of a radioactive contaminant from water by leveraging the magnetic manipulation capabilities of a helical and magnetic Ni micromotor coated with Cs-selective nickel ferrocyanide (NiFC). The use of polyvinyl alcohol fibers as a template enables the straightforward preparation of the helical wire structure, allowing for precise control over the diameter and pitch of the helix through simple twisting with Ni wires. By harnessing Ni2+ ions eluted from the Ni micromotor in an acid solution, we successfully fabricate NiFC-coated Ni (NiFC/Ni) micromotors that exhibit a selective removal efficiency greater than 98% for 137Cs, even in the presence of high concentrations of competing Na+ ions. Under the influence of an external magnetic field, the NiFC/Ni micromotor demonstrates rapid motion, achieving a pulling motion (100 body lengths per second) through a magnetic gradient and a tumbling motion (46 body lengths per second) induced by a rotating magnetic field. The tumbling motion of the NiFC/Ni micromotor substantially improves the Cs adsorption rate, resulting in a rate that surpasses that achieved under nonmoving conditions by a factor of 21. This improved adsorption rate highlights the considerable potential of magnetically manipulated micromotor self-propulsion for efficient water-pollution treatment.
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Affiliation(s)
- Chan Woo Park
- Decommissioning Technology Division, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 34057, Republic of Korea.
| | - Euna Jeong
- Decommissioning Technology Division, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 34057, Republic of Korea; Department of Chemical Engineering and Applied Chemistry, College of Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea
| | - Hee-Man Yang
- Decommissioning Technology Division, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 34057, Republic of Korea
| | - Hyung-Ju Kim
- Decommissioning Technology Division, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 34057, Republic of Korea
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Li H, Pan J, Ping Y, Su J, Fang M, Chen T, Pan B, Lu Z. Annealed SiO 2 Protective Layer on LiMn 2O 4 for Enhanced Li-Ion Extraction from Brine. NANO LETTERS 2023; 23:10458-10465. [PMID: 37922401 DOI: 10.1021/acs.nanolett.3c03136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2023]
Abstract
In this study, we present a novel approach for selective Li-ion extraction from brine using an LiMn2O4 ion sieve coated with a dense silica layer, denoted as LMO@SiO2. The SiO2 layer is controllably coated onto the LMO surface, forming passivation layers and ion permeation filters. This design effectively minimizes the acidic corrosion of the LMO and enhances the Li+ adsorption capacity. Additionally, the SiO2 layer undergoes calcination at various temperatures (ranging from 300 to 700 °C) to achieve different compactness levels of the coating layer, providing further protection to the LMO crystal structures. As a result of these improvements, the optimized LMO@SiO2 adsorbent demonstrates an exceptional Li+ adsorption capacity of 18.5 mg/g for brine, and even after seven adsorption-elution cycles, it maintains a capacity of 15.3 mg/g. This outstanding performance makes our material a promising candidate for efficient Li+ extraction from brine or other low-concentration Li+ solutions in future applications.
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Affiliation(s)
- Hualun Li
- College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, and State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210023, China
| | - Jiahao Pan
- College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, and State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210023, China
| | - Yitao Ping
- College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, and State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210023, China
| | - Jialun Su
- College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, and State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210023, China
| | - Moling Fang
- Nanjing Foreign Language School, Nanjing 210008, China
| | - Tian Chen
- College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, and State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210023, China
| | - Bingcai Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China
| | - Zhenda Lu
- College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, and State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210023, China
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China
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Yu J, Chen X, Ren H, Li X, Shi X, Chen Z, Liang S, Li Y. Study on adsorption characteristics of radioactive gaseous iodine on Ag ion exchange molecular sieve. J Radioanal Nucl Chem 2023. [DOI: 10.1007/s10967-023-08826-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2023]
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Celis-Arias V, Garduño-Wilchis IA, Alarcón G, González Chávez F, Garrido Guerrero E, Beltrán HI, Loera-Serna S. Room-temperature synthesis of nanometric and luminescent silver-MOFs. Front Chem 2023; 10:1065622. [PMID: 36688033 PMCID: PMC9853072 DOI: 10.3389/fchem.2022.1065622] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 12/19/2022] [Indexed: 01/09/2023] Open
Abstract
Three silver-MOFs were prepared using an optimized, room-temperature methodology starting from AgNO₃ and dicarboxylate ligands in water/ethanol yielding Ag 2 BDC, Ag 2 NDC (UAM-1), and Ag 2 TDC (UAM-2) at 38%-48% (BDC, benzenedicarboxylate; NDC, 1,8-naphthalene-dicarboxylate; TDC, p-terphenyl-4,4″-dicarboxylate). They were characterized by PXRD/FT-IR/TGA/photoluminescence spectroscopy, and the former two by SEM. These materials started decomposing at 330°C, while showing stability. The crystal structure of UAM-1 was determined by PXRD, DFT calculations, and Rietveld refinement. In general, the structure was 3D, with the largest Ag-O bond interlinking 2D layers. The FT-IR spectra revealed 1450 and 1680 bands (cm-1) of asymmetrically stretching aniso-/iso-bidentate -COO in coordination with 2/3-Ag atoms, accompanied by Ag-O bands at 780-740 cm-1, all demonstrating the network formation. XRD and SEM showed nanometric-scale crystals in Ag₂BDC, and UAM-1 developed micrometric single-stranded/agglomerated fibrillar particles of varying nanometric widths. Luminescence spectroscopy showed emission by Ag₂BDC, which was attributed to ligand-to-metal or ligand-to-metal-metal transitions, suggesting energy transfer due to the short distance between adjacent BDC molecules. UAM-1 and UAM-2 did not show luminescence emission attributable to ligand-to-metal transition; rather, they presented only UV emission. The stabilities of Ag₂BDC and UAM-1 were evaluated in PBS/DMEM/DMEM+FBS media by XRD, which showed that they lost their crystallinity, resulting in AgCl due to soft-soft (Pearson's principle) affinity.
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Affiliation(s)
- Vanessa Celis-Arias
- Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana Azcapotzalco, Ciudad de México, Mexico
| | - Ismael A. Garduño-Wilchis
- Cátedras CONACyT, Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Ciudad de México, Mexico
| | - Gilberto Alarcón
- Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Ciudad de México, Mexico
| | | | - Efrain Garrido Guerrero
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Hiram I. Beltrán
- Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana Azcapotzalco, Ciudad de México, Mexico,*Correspondence: Hiram I. Beltrán, ; Sandra Loera-Serna,
| | - Sandra Loera-Serna
- Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana Azcapotzalco, Ciudad de México, Mexico,*Correspondence: Hiram I. Beltrán, ; Sandra Loera-Serna,
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Pang C, You H, Liang L, Li Z, Lin X, Zhang Y, Zhang H, Pan X, Hu Y, Chen Y, Luo X, Wang H. Bamboo pulp-based electret fiber aerogel with enhanced electret performance by P-phenylenediamine modification for simulated radioactive aerosol purification in confined spaces. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hao BB, Qiao N, Rong Y, Zhang CX, Wang QL. Bifunctional Metal-Organic Framework Functionalized by Dimethylamine Cations: Proton Conduction and Iodine Vapor Adsorption. Inorg Chem 2022; 61:9533-9540. [PMID: 35687844 DOI: 10.1021/acs.inorgchem.2c00597] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A metal-organic framework, {Zn3(BTB)2(μ3-OH)[(CH3)2NH2](H2O)}n (1), was synthesized based on H3BTB (1,3,5-tri(4-carboxyphenyl)benzene). An AC impedance test proves that 1 has a relatively high conductivity performance of 1.52 × 10-3 S·cm-1 at 338 K and 98% RH. The proton conductivity of the composite film 1@CS-9 (CS = chitosan) reaches 1.84 × 10-1 S·cm-1 at 328 K and 98% RH. In addition, 1 is discovered to have a good adsorption effect on iodine vapor, and the adsorption capacity reaches 726 mg·g-1. The multifunctionality caused by dimethylamine cations was investigated for the first time, which has implications for multifunctionality generated by host-guest molecules.
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Affiliation(s)
- Biao-Biao Hao
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, P. R. China
| | - Na Qiao
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, P. R. China
| | - Yi Rong
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, P. R. China
| | - Chen-Xi Zhang
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, P. R. China.,Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, Tianjin University of Science and Technology, Tianjin 300457, P. R. China
| | - Qing-Lun Wang
- College of Chemistry, Nankai University, Tianjin 300071, P. R. China.,Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, P. R. China
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Zhang X, Maddock J, Nenoff TM, Denecke MA, Yang S, Schröder M. Adsorption of iodine in metal-organic framework materials. Chem Soc Rev 2022; 51:3243-3262. [PMID: 35363235 PMCID: PMC9328120 DOI: 10.1039/d0cs01192d] [Citation(s) in RCA: 95] [Impact Index Per Article: 47.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Indexed: 12/13/2022]
Abstract
Nuclear power will continue to provide energy for the foreseeable future, but it can pose significant challenges in terms of the disposal of waste and potential release of untreated radioactive substances. Iodine is a volatile product from uranium fission and is particularly problematic due to its solubility. Different isotopes of iodine present different issues for people and the environment. 129I has an extremely long half-life of 1.57 × 107 years and poses a long-term environmental risk due to bioaccumulation. In contrast, 131I has a shorter half-life of 8.02 days and poses a significant risk to human health. There is, therefore, an urgent need to develop secure, efficient and economic stores to capture and sequester ionic and neutral iodine residues. Metal-organic framework (MOF) materials are a new generation of solid sorbents that have wide potential applicability for gas adsorption and substrate binding, and recently there is emerging research on their use for the selective adsorptive removal of iodine. Herein, we review the state-of-the-art performance of MOFs for iodine adsorption and their host-guest chemistry. Various aspects are discussed, including establishing structure-property relationships between the functionality of the MOF host and iodine binding. The techniques and methodologies used for the characterisation of iodine adsorption and of iodine-loaded MOFs are also discussed together with strategies for designing new MOFs that show improved performance for iodine adsorption.
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Affiliation(s)
- Xinran Zhang
- School of Chemistry, University of Manchester, Manchester, M13 9PL, UK.
| | - John Maddock
- School of Chemistry, University of Manchester, Manchester, M13 9PL, UK.
| | - Tina M Nenoff
- Materials, Physics and Chemical Sciences Center, Sandia National Laboratories, Albuquerque, NM 87185, USA
| | - Melissa A Denecke
- School of Chemistry, University of Manchester, Manchester, M13 9PL, UK.
- Division of Physical and Chemical Science, Department of Nuclear Applications, International Atomic Energy Agency, Vienna International Centre, PO Box 100, 1400 Vienna, Austria
| | - Sihai Yang
- School of Chemistry, University of Manchester, Manchester, M13 9PL, UK.
| | - Martin Schröder
- School of Chemistry, University of Manchester, Manchester, M13 9PL, UK.
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Wang Y, Li K, Fang D, Ye X, Liu H, Tan X, Li Q, Li J, Wu Z. Ammonium molybdophosphate/metal-organic framework composite as an effective adsorbent for capture of Rb+ and Cs+ from aqueous solution. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2021.122767] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Lee SY, Seo HJ, An HR, Kwon JS. Immobile crystallization of radioactive iodide by redox transformation of a low crystalline copper phase. CHEMOSPHERE 2022; 287:132266. [PMID: 34543898 DOI: 10.1016/j.chemosphere.2021.132266] [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: 08/08/2021] [Revised: 09/09/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
Here we show an innovative way to effectively scavenge highly mobile radioiodide and to dramatically reduce its waste volume through a spontaneous phase transformation. Under an anaerobic condition, as metallic copper (II) was favorably associated with bicarbonate (HCO3-) in solution, a cupriferous carbonate compound (malachite) quickly formed, which was redox-sensitive and transformable to a compact crystal of CuI (marshite). The formation of CuI crystal was principally led by the spontaneous Cu-I redox reaction centering around the copper phase over the presence of sulfate (SO42-). The completely transformed CuI crystal was poorly soluble in water and grew to large microcrystals (∼μm) via a remarkable selectivity for I-. Interestingly, this redox-induced iodide crystallization was rather promoted over the existence of anionic competitors (e.g., HCO3- and SO42-), which usually exist in wastewater and natural water. Unlike the conventional methods, these competing anions positively behaved in our system by supporting that the initial malachite was more apt to be reactive to largely attract highly mobile I-. Under practical environments with various anions, such a selective I- uptake and fixation within a compact crystalline space will be a promising way to effectively remove I- in a great capacity.
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Affiliation(s)
- Seung Yeop Lee
- Disposal Performance Demonstration Research Division, Korea Atomic Energy Research Institute (KAERI), Daejeon, 34057, Republic of Korea.
| | - Hyo Jin Seo
- Disposal Performance Demonstration Research Division, Korea Atomic Energy Research Institute (KAERI), Daejeon, 34057, Republic of Korea
| | - Ha-Rim An
- Center for Research Equipment, Korea Basic Science Institute (KBSI), Daejeon, 34133, Republic of Korea
| | - Jang-Soon Kwon
- Disposal Performance Demonstration Research Division, Korea Atomic Energy Research Institute (KAERI), Daejeon, 34057, Republic of Korea
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Ultralight ethyl cellulose-based electret fiber membrane for low-resistance and high-efficient capture of PM2.5. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Chen J, Jiao Y, Chen K, Wang P, Wang J, Mao P, Jiang J, He M, Liu Y, Gong C, Yang Y. Hierarchically mesoporous mixed copper oxide/calcined layered double hydroxides composites for iodide high-efficiency elimination. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Ashiq A, Walpita J, Vithanage M. Functionalizing non-smectic clay via methoxy-modification for enhanced removal and recovery of oxytetracycline from aqueous media. CHEMOSPHERE 2021; 276:130079. [PMID: 33721631 DOI: 10.1016/j.chemosphere.2021.130079] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 02/09/2021] [Accepted: 02/19/2021] [Indexed: 06/12/2023]
Abstract
Kaolinite and methoxy-modified kaolinite were used as novel adsorbents for oxytetracycline (OTC) removal and recovery from aqueous media. Batch adsorption experiments were performed to study the effect of pH, ionic strengths, initial concentration, and contact time on OTC adsorption. The adsorbents were characterized using powder X-ray diffraction (PXRD), Fourier-transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS) before and after adsorption. Adsorption of OTC reached its maximum when solution pH increased up to 6 for 0.001 M ionic strength, above which adsorption decreased further when solution pH increased. Freundlich and Langmuir's models best fit the equilibrium data with a strong dependency on OTC adsorption capacity giving its maximum at 36 mg g-1. Binding is postulated for OTC adsorption on pristine kaolinite as a special case of Hill model with independent binding interaction of OTC adsorption onto the clay that affects the adjacent sites on the pristine kaolinite, in contrast with the adsorption of OTC on methoxy-modified kaolinite. Nitrogen peaks of the XPS spectra indicated changes in the oxidation states of C-N bonds in the N1s peaks by forming tertiary amide C-N and methoxy O-CH3 bonds which corroborated with the results from FTIR spectra. Removal efficiencies and spectroscopic results indicate that performance on methoxy-modified kaolinite is a promising modification on the clay for recovering antibiotics from wastewater.
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Affiliation(s)
- Ahmed Ashiq
- Ecosphere Resilience Research Centre, Faculty of Applied Sciences, University of Sri Jayewardenepura, Sri Lanka
| | - Janitha Walpita
- Ecosphere Resilience Research Centre, Faculty of Applied Sciences, University of Sri Jayewardenepura, Sri Lanka; Instrument Centre, Faculty of Applied Sciences, University of Sri Jayewardenepura, Sri Lanka
| | - Meththika Vithanage
- Ecosphere Resilience Research Centre, Faculty of Applied Sciences, University of Sri Jayewardenepura, Sri Lanka.
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Wan J, Shen Y, Xu L, Xu R, Zhang J, Sun H, Zhang C, Yin C, Wang X. Ferrocene-functionalized Ni(II)-based metal-organic framework as electrochemical sensing interface for ratiometric analysis of Cu2+, Pb2+ and Cd2+. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115374] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Inglezakis VJ, Satayeva A, Yagofarova A, Tauanov Z, Meiramkulova K, Farrando-Pérez J, Bear JC. Surface Interactions and Mechanisms Study on the Removal of Iodide from Water by Use of Natural Zeolite-Based Silver Nanocomposites. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1156. [PMID: 32545557 PMCID: PMC7353426 DOI: 10.3390/nano10061156] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 04/27/2020] [Accepted: 04/27/2020] [Indexed: 12/01/2022]
Abstract
In this work a natural zeolite was modified with silver following two different methods to derive Ag2O and Ag0 nanocomposites. The materials were fully characterized and the results showed that both materials were decorated with nanoparticles of size of 5-25 nm. The natural and modified zeolites were used for the removal of iodide from aqueous solutions of initial concentration of 30-1400 ppm. Natural zeolite showed no affinity for iodide while silver forms were very efficient reaching a capacity of up to 132 mg/g. Post-adsorption characterizations showed that AgI was formed on the surface of the modified zeolites and the amount of iodide removed was higher than expected based on the silver content. A combination of experimental data and characterizations indicate that the excess iodide is most probably related to negatively charged AgI colloids and Ag-I complexes forming in the solution as well as on the surface of the modified zeolites.
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Affiliation(s)
- Vassilis J. Inglezakis
- Department of Chemical & Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur Sultan 010000, Kazakhstan; (A.S.); (A.Y.)
- Environment & Resource Efficiency Cluster (EREC), Nazarbayev University, Nur Sultan 010000, Kazakhstan
| | - Aliya Satayeva
- Department of Chemical & Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur Sultan 010000, Kazakhstan; (A.S.); (A.Y.)
- Environment & Resource Efficiency Cluster (EREC), Nazarbayev University, Nur Sultan 010000, Kazakhstan
| | - Almira Yagofarova
- Department of Chemical & Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur Sultan 010000, Kazakhstan; (A.S.); (A.Y.)
- Environment & Resource Efficiency Cluster (EREC), Nazarbayev University, Nur Sultan 010000, Kazakhstan
| | - Zhandos Tauanov
- Faculty of Chemistry and Chemical Technology, al-Farabi Kazakh National University, Almaty 050040, Kazakhstan;
| | - Kulyash Meiramkulova
- Department of Environmental Engineering & Management, L.N.Gumilyov Eurasian National University, Nur Sultan 010000, Kazakhstan;
| | - Judit Farrando-Pérez
- Laboratorio de Materiales Avanzados, Departamento de Química Inorgánica-Instituto Universitario de Materiales, Universidad de Alicante, 03690 Alicante, Spain;
| | - Joseph C. Bear
- School of Life Science, Pharmacy & Chemistry, Kingston University, Penrhyn Road, Kingston upon Thames KT1 2EE, UK;
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