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Wang X, Meng R, Zhao S, Jing Z, Jin Y, Zhang J, Du Q, Pi X, Chen L, Li Y. MIL-88A(Al)/chitosan/graphene oxide composite aerogel with hierarchical porosity for enhanced radioactive iodine adsorption. Int J Biol Macromol 2024:134456. [PMID: 39098697 DOI: 10.1016/j.ijbiomac.2024.134456] [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: 04/09/2024] [Revised: 07/17/2024] [Accepted: 08/01/2024] [Indexed: 08/06/2024]
Abstract
To ensure the sustainable development of the nuclear industry, the effective capture of radioiodine from nuclear wastewater has attracted much attention. Herein, a novel MIL-88A(Al)/chitosan/graphene oxide (MCG) composite aerogel was prepared by using crosslinked chitosan and graphene oxide as the 3D network skeleton, and MIL-88A(Al) nanocrystalline particles were introduced into the skeleton by freeze-drying method. MIL-88A(Al) adsorption capacities for volatile and soluble iodine were 2.02 g g-1 and 850.00 mg g-1, respectively. Owing to the synergistic effect of MIL-88A(Al), GO, CS, and the hierarchically porous structures of the MCG aerogel, the adsorption capacities for volatile and soluble iodine by the MCG aerogel were increased to 2.62 g g-1 and 1072.60 mg g-1, respectively. Furthermore, the adsorption performance of the MCG aerogel for volatile and soluble iodine could be maintained at 83 % and 82 % after 5 cycles, suggesting excellent recoverability. Meanwhile, the adsorption mechanism studies showed the interactions between iodine and NH, AlO, and CO in MCG aerogel. Furthermore, the adsorption process is consistent with the Elovich kinetic and Sips isotherm models. MCG aerogels are potential candidates for enhanced radioiodine adsorption due to their high radioiodine capture performance and excellent recyclability.
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Affiliation(s)
- Xinxin Wang
- College of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Rd, Qingdao 266071, PR China
| | - Ruixue Meng
- State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Materials Science and Engineering, Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Institute of Marine Biobased Materials, Qingdao University, 308 Ningxia Rd, Qingdao 266071, PR China
| | - Shiyong Zhao
- College of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Rd, Qingdao 266071, PR China
| | - Zhenyu Jing
- College of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Rd, Qingdao 266071, PR China
| | - Yonghui Jin
- College of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Rd, Qingdao 266071, PR China
| | - Jie Zhang
- College of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Rd, Qingdao 266071, PR China
| | - Qiujiu Du
- State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Materials Science and Engineering, Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Institute of Marine Biobased Materials, Qingdao University, 308 Ningxia Rd, Qingdao 266071, PR China
| | - Xinxin Pi
- College of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Rd, Qingdao 266071, PR China
| | - Long Chen
- State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Materials Science and Engineering, Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Institute of Marine Biobased Materials, Qingdao University, 308 Ningxia Rd, Qingdao 266071, PR China.
| | - Yanhui Li
- College of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Rd, Qingdao 266071, PR China.
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Zhu C, Xiao X, Wang X, Ma Z, Han Y. Lignin-modified graphitic carbon nitride nanotubes for photocatalytic H 2O 2 production and degradation of brilliant black BN. Int J Biol Macromol 2024; 267:131533. [PMID: 38608988 DOI: 10.1016/j.ijbiomac.2024.131533] [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] [Received: 12/27/2023] [Revised: 03/07/2024] [Accepted: 04/09/2024] [Indexed: 04/14/2024]
Abstract
As a renewable aromatic compound with enormous production potential, lignin has various potential high-value utilization pathways, but the success achieved in the field of photocatalysis is limited. Herein, this work prepares a new type of photocatalyst by modifying Graphitic Carbon Nitride Nanotubes (CNT) with self-assembled lignin nanospheres for the photocatalytic production of H2O2 and the degradation of azo dyes. Under light conditions, lignin enhances the production of H2O2 through oxygen reduction and collaborates with carbon nitride tubes to generate O2- and 1O2. Furthermore, carbon nitride tubes form electron-rich regions with lignin, promoting the transfer of electrons from adsorbed aromatic pollutants to this region, thereby facilitating their degradation. The experimental results indicate that the addition of 5 % lignin significantly enhances the photocatalytic degradation efficiency of azo dyes, with a degradation rate 1.87 times higher than that of the original carbon nitride tubes. Furthermore, CNL also have excellent degradation ability to pollutants in actual wastewater. This study provides new insights and prospects for the high-value utilization of lignin, enabling it to be used as a photocatalytic co-catalyst to participate in the photocatalytic degradation of environmental pollutants.
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Affiliation(s)
- Chen Zhu
- The Liaoning Province Key Laboratory of Paper and Pulp Engineering, The Key Laboratory of High Value Utilization of Botanical Resources of China, Light Industry College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Xinyu Xiao
- The Liaoning Province Key Laboratory of Paper and Pulp Engineering, The Key Laboratory of High Value Utilization of Botanical Resources of China, Light Industry College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Xing Wang
- The Liaoning Province Key Laboratory of Paper and Pulp Engineering, The Key Laboratory of High Value Utilization of Botanical Resources of China, Light Industry College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Zihao Ma
- The Liaoning Province Key Laboratory of Paper and Pulp Engineering, The Key Laboratory of High Value Utilization of Botanical Resources of China, Light Industry College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
| | - Ying Han
- The Liaoning Province Key Laboratory of Paper and Pulp Engineering, The Key Laboratory of High Value Utilization of Botanical Resources of China, Light Industry College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China; State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
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3
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Hong W, Lian Z, Jiang H, Chen J, Zhang Z, Ni Z. Progress in advanced electrospun membranes for CO 2 capture: Feedstock, design, and trend. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 352:120026. [PMID: 38184873 DOI: 10.1016/j.jenvman.2024.120026] [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: 10/04/2023] [Revised: 12/04/2023] [Accepted: 01/02/2024] [Indexed: 01/09/2024]
Abstract
The emission of large amounts of carbon dioxide has caused serious environmental problems and hindered the construction of a green and low-carbon society. Efficient carbon dioxide capture has become an important means to slow down global climate warming and achieve effective utilization of carbon dioxide. Membranes synthesized by electrospinning technology are becoming promising carbon capture materials due to their unique characteristics. This review describes the features of membranes prepared from available raw materials and presents their application performances in carbon capture. The preparation methods of various types of membrane materials with excellent capture performance are summarized, and the effects of electrospinning parameters on electrospun fibers are systematically analyzed. Furthermore, recommendations and expectations for further development of electrospun membranes for carbon capture applications are given. These works provide important references for an in-depth understanding of the development status of electrospun membranes in the field of carbon capture and for expanding future research.
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Affiliation(s)
- Wenpeng Hong
- School of Energy and Power Engineering, Northeast Electric Power University, Jilin, 132012, PR China
| | - Zhengru Lian
- School of Energy and Power Engineering, Northeast Electric Power University, Jilin, 132012, PR China
| | - Haifeng Jiang
- School of Energy and Power Engineering, Northeast Electric Power University, Jilin, 132012, PR China.
| | - Jie Chen
- Center of Analysis and Measurement, Jilin Institute of Chemical Technology, Jilin, 132022, PR China
| | - Zongyuan Zhang
- School of Energy and Power Engineering, Northeast Electric Power University, Jilin, 132012, PR China
| | - Zhenjia Ni
- School of Energy and Power Engineering, Northeast Electric Power University, Jilin, 132012, PR China
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4
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Khorasani AC, Satvati PR. Reusable cellulose-based biosorbents for efficient iodine adsorption by economic microcrystalline cellulose production from walnut shell. Int J Biol Macromol 2024; 256:128432. [PMID: 38013070 DOI: 10.1016/j.ijbiomac.2023.128432] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 11/10/2023] [Accepted: 11/23/2023] [Indexed: 11/29/2023]
Abstract
Sustainable management of walnut shell (WS) for the extraction of cellulose and preparation of cellulose-based biosorbents of iodine was carried out as a new approach to simultaneously solve the environmental challenge of agricultural solid waste and iodine-contaminated water. A rapid recyclable nitric acid treatment and NaOH-H2O2 alkaline-peroxide treatment of WS (33 % cellulose) extracted pure microcrystalline (Cac) and impure cellulose (Cal) with a 21.70 % and 47.37 % isolation yield, respectively. The techno-economic assessment of cellulose production showed a net profit of 9.02 $/kg for Cac, whereas it was estimated as negative for Cal. The simultaneous carbonization and magnetization of Cac at 550 °C resulted in an amorphous, magnetic cellulose-derived biochar (MB550Cac) with a BET specific surface area of 12.64 m2/g, decorated with scattered irregular Fe3O4 microparticles. The adsorption capacity of MB550Cac for iodine was 555.63 mg/g, which was lost only 17.45 % after six successful cycles of regeneration. Freundlich isotherm model sufficiently described the reversible iodine adsorption on the heterogenous surface. The adsorption kinetics followed the pseudo-second-order model. Further, the adsorption thermodynamics demonstrated spontaneous and favorable adsorption. These findings suggest the valorization of WS to commercially produce cellulose and MB550Cac as a sustainable, efficient biosorbent with a good application prospect in wastewater treatment.
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Affiliation(s)
| | - Paria Razavi Satvati
- Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
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5
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Shreeraj G, Sah A, Sarkar S, Giri A, Sahoo A, Patra A. Structural Modulation of Nitrogen-Rich Covalent Organic Frameworks for Iodine Capture. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16069-16078. [PMID: 37847043 DOI: 10.1021/acs.langmuir.3c02215] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
Developing efficient adsorbent materials for iodine scavenging is essential to mitigate the threat of radioactive iodine causing adverse effects on human health and the environment. In this context, we explored N-rich two-dimensional covalent organic frameworks (COFs) with diverse functionalities for iodine capture. The pyridyl-hydroxyl-functionalized triazine-based novel 5,5',5″-(1,3,5-triazine-2,4,6-triyl)tris(pyridine-2-amine) (TTPA)-COF possesses high crystallinity (crystalline domain size: 24.4 ± 0.6 nm) and high porosity (specific BET surface area: 1000 ± 90 m2 g-1). TTPA-COF exhibits superior vapor-phase iodine adsorption (4.43 ± 0.01 g g-1) compared to analogous COF devoid of pyridinic moieties, 2,4,6-tris(4-aminophenyl)-1,3,5-triazine (TAPT)-COF. The high iodine capture by TTPA-COF is due to the enhanced binding affinity conferred by the extra pyridinic active sites. Furthermore, the crucial role of long-range order in porous adsorbents has been experimentally evidenced by comparing the performance of iodine vapor capture of TTPA-COF with an amorphous network polymer having identical functionalities. We have also demonstrated the high iodine scavenging ability of TTPA-COF from the organic and aqueous phases. The mechanism of iodine adsorption by the heteroatom-rich framework is elucidated through FTIR, XPS, and Raman spectral analyses. The present study highlights the need for structural tweaking of the building blocks toward the rational construction of advanced functional porous materials for a task-specific application.
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Affiliation(s)
- G Shreeraj
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, Madhya Pradesh, India
| | - Ajay Sah
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, Madhya Pradesh, India
| | - Suprabhat Sarkar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, Madhya Pradesh, India
| | - Arkaprabha Giri
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, Madhya Pradesh, India
| | - Aniket Sahoo
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, Madhya Pradesh, India
| | - Abhijit Patra
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, Madhya Pradesh, India
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Shi Z, Huang X, Zhao Y, Li J, Tian YQ, Zhang PP, Zhu M, Zhao M. Construction of a novel ursolic acid-based supramolecular gel for efficient removal of iodine from solution. ENVIRONMENTAL RESEARCH 2023; 235:116617. [PMID: 37437868 DOI: 10.1016/j.envres.2023.116617] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/01/2023] [Accepted: 07/09/2023] [Indexed: 07/14/2023]
Abstract
Pentacyclic triterpenes is a natural amphipathic product which possess a rigid backbone and several polar functional groups such as hydroxyl, carbonyl and carboxyl groups. The amphipathic character makes it easy to realize self-assemble into complex nano structure and therefore attract extensive attention due to the simple synthetic processes and renewable raw materials. Hence, a novel Ursolic acid-based hydrogel was prepared successfully via a simple self-assembly of triterpenoid derivative in methanol by capture water molecule in air. The resulting hydrogel show a porous morphology and good elasticity including strong heat resistance. Based on the characteristic above, the hydrogel showed a good iodine adsorption capacity and can removal 75.0% of the iodine from cyclohexane solution and 66.3% from aqueous solution within 36 h. Data analysis indicate that all the iodine adsorption process are dominated by chemisorption and belongs to the multi-site adsorption on heterogenous surfaces. In addition, the obtained hydrogel also possesses a good recyclability which can maintain more than 82% of its capacity after 5 cycles. The simple preparation method and easily available raw materials endow it a great potential in future pollutant treatment.
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Affiliation(s)
- Zhichun Shi
- College of Chemistry and Chemical Engineering, Qiqihar University, Wenhua Street No.42, Qiqihar, Heilongjiang, 161006, China; Technology Innovation Center of Industrial Hemp for State Market Regulation, Qiqihar, Heilongjiang, 161006, China.
| | - Xiuqi Huang
- College of Chemistry and Chemical Engineering, Qiqihar University, Wenhua Street No.42, Qiqihar, Heilongjiang, 161006, China
| | - Yingnan Zhao
- College of Chemistry and Chemical Engineering, Qiqihar University, Wenhua Street No.42, Qiqihar, Heilongjiang, 161006, China; Technology Innovation Center of Industrial Hemp for State Market Regulation, Qiqihar, Heilongjiang, 161006, China
| | - Jun Li
- College of Chemistry and Chemical Engineering, Qiqihar University, Wenhua Street No.42, Qiqihar, Heilongjiang, 161006, China; Technology Innovation Center of Industrial Hemp for State Market Regulation, Qiqihar, Heilongjiang, 161006, China
| | - Yan Qing Tian
- College of Chemistry and Chemical Engineering, Qiqihar University, Wenhua Street No.42, Qiqihar, Heilongjiang, 161006, China
| | - Piao Piao Zhang
- College of Chemistry and Chemical Engineering, Qiqihar University, Wenhua Street No.42, Qiqihar, Heilongjiang, 161006, China
| | - Min Zhu
- College of Chemistry and Chemical Engineering, Qiqihar University, Wenhua Street No.42, Qiqihar, Heilongjiang, 161006, China; Technology Innovation Center of Industrial Hemp for State Market Regulation, Qiqihar, Heilongjiang, 161006, China
| | - Ming Zhao
- College of Chemistry and Chemical Engineering, Qiqihar University, Wenhua Street No.42, Qiqihar, Heilongjiang, 161006, China; Technology Innovation Center of Industrial Hemp for State Market Regulation, Qiqihar, Heilongjiang, 161006, China
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7
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Kong Y, Xu J, Zhou J, Wang X. A universal approach for producing lignin-based monocomponent fiber by one-step ethanol fractionation. Int J Biol Macromol 2023; 242:124751. [PMID: 37164137 DOI: 10.1016/j.ijbiomac.2023.124751] [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: 04/05/2023] [Revised: 04/25/2023] [Accepted: 05/02/2023] [Indexed: 05/12/2023]
Abstract
To achieve sustainable whole process of carbon-fiber production and high-value utilization of lignin, one-step ethanol fractionation followed by coaxial electrospinning was applied to produce lignin-based monocomponent carbon-fiber. To elucidate the mechanism, hydrothermal extracted poplar lignin (HPL) were obtained to be divide into two parts through ethanol fractionation, in which the ethanol-soluble lignin (ESL) was eletrcospun into fiber precursors. Then, to verify the universality of this method, four more lignin were extracted to produce fiber precursors, after which five kinds of carbon fibers were prepared by carbonization of the corresponding precursors. Structural analysis showed that ESL of HPL is a small and highly branched three-dimensional stereomolecules. Combined with the SEM results of fiber precursors, the mechanism which hydrogen bonding promotes fiber formation was elucidated. Among all five samples, carbon-fiber prepared from HPL possesses the minimum fiber diameter of 557 nm, the smallest interplanar spacing of 0.3909 nm, ID/IG value of 0.6345 and the largest specific surface area of 408.15 m2/g. This work proposes a universal method to prepare lignin-based monocomponent carbon-fiber, in which carbon-fibers prepared from HPL exhibits the best comprehensive performance and can be applied to capture radioactive iodine.
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Affiliation(s)
- Yue Kong
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jingyu Xu
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jinghui Zhou
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Xing Wang
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
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8
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Hadinejad F, Morad H, Jahanshahi M, Zarrabi A, Pazoki-Toroudi H, Mostafavi E. A Novel Vision of Reinforcing Nanofibrous Masks with Metal Nanoparticles: Antiviral Mechanisms Investigation. ADVANCED FIBER MATERIALS 2023; 5:1-45. [PMID: 37361103 PMCID: PMC10088653 DOI: 10.1007/s42765-023-00275-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 02/13/2023] [Indexed: 06/28/2023]
Abstract
Prevention of spreading viral respiratory disease, especially in case of a pandemic such as coronavirus disease of 2019 (COVID-19), has been proved impossible without considering obligatory face mask-wearing protocols for both healthy and contaminated populations. The widespread application of face masks for long hours and almost everywhere increases the risks of bacterial growth in the warm and humid environment inside the mask. On the other hand, in the absence of antiviral agents on the surface of the mask, the virus may have a chance to stay alive and be carried to different places or even put the wearers at risk of contamination when touching or disposing the masks. In this article, the antiviral activity and mechanism of action of some of the potent metal and metal oxide nanoparticles in the role of promising virucidal agents have been reviewed, and incorporation of them in an electrospun nanofibrous structure has been considered an applicable method for the fabrication of innovative respiratory protecting materials with upgraded safety levels. Graphical Abstract
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Affiliation(s)
- Farinaz Hadinejad
- Nanotechnology Research Institute, Faculty of Chemical Engineering, Babol Noushirvani University of Technology, Babol, 4714873113 Iran
| | - Hamed Morad
- Department of Pharmaceutics and Pharmaceutical Nanotechnology, School of Pharmacy, Iran University of Medical Sciences, Tehran, 1475886973 Iran
- Ramsar Campus, Mazandaran University of Medical Sciences, Ramsar, 4691710001 Iran
| | - Mohsen Jahanshahi
- Nanotechnology Research Institute, Faculty of Chemical Engineering, Babol Noushirvani University of Technology, Babol, 4714873113 Iran
| | - Ali Zarrabi
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Istinye University, Istanbul, 34396 Turkey
| | - Hamidreza Pazoki-Toroudi
- Physiology Research Center, Faculty of Medicine, Iran University of Medical Sciences, Tehran, 1449614535 Iran
- Department of Physiology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, 1449614535 Iran
| | - Ebrahim Mostafavi
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA 94305 USA
- Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305 USA
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9
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Chen D, Ma T, Zhao X, Jing X, Zhao R, Zhu G. Multi-Functionalization Integration into the Electrospun Nanofibers Exhibiting Effective Iodine Capture from Water. ACS APPLIED MATERIALS & INTERFACES 2022; 14:47126-47135. [PMID: 36202176 DOI: 10.1021/acsami.2c14724] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Efficient capture of radioiodine from aqueous solutions is of importance for sustainable development of nuclear energy and protection of the environment. However, current adsorbents under exploration suffer from limited adsorption capacity and powder form that are unfavorable for practical applications. Herein, we applied a "multi-functionalization integration" idea to construct novel electrospun fiber adsorbents (N-MOF-PAN fibers) containing cationic quaternary ammonium groups, uncharged amine groups, and porous MOF material (UiO-66-NH2), which in synergy adsorb iodine effectively from both saturated I2 aqueous solution and I3- aqueous solution. Iodine species (94.6%) could be removed from saturated I2 solution within 180 min, and 98.7% of iodine species were captured from I3- solution within 240 min. Additionally, the N-MOF-PAN fibers exhibited high iodine uptake capacities of 3.56 g g-1 from a concentrated KI/I2 aqueous solution and 3.61 g g-1 from the Langmuir isotherm model, surpassing many reported iodine adsorbents in the aqueous medium. Characterization and mechanism analysis indicated that multiple active sites simultaneously attribute to the high binding affinity toward iodine species through physical adsorption and chemical adsorption. Furthermore, benefiting from their macroscopic architecture, N-MOF-PAN fibers were used as the adsorption column for dynamic iodine capture with a bed volume of 1490 mL, which is much higher than commercially activated carbons. Overall, this work provides guidance for the development of novel fiber adsorbents for related applications.
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Affiliation(s)
- Dingyang Chen
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun130024, China
| | - Tingting Ma
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun130024, China
| | - Xinyue Zhao
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun130024, China
| | - Xiaofei Jing
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun130024, China
| | - Rui Zhao
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun130024, China
| | - Guangshan Zhu
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun130024, China
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10
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Removal of the Homolog Tellurium of Polonium by SiO2 Nanofiber Filter for Lead Alloy-Cooled Reactors. TOXICS 2022; 10:toxics10060275. [PMID: 35736884 PMCID: PMC9227177 DOI: 10.3390/toxics10060275] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/17/2022] [Accepted: 05/19/2022] [Indexed: 02/04/2023]
Abstract
The lead–bismuth eutectic (LBE) can be easily activated by neutron radiation to produce the radionuclide 210Po. It is therefore necessary to establish an effective method to remove vaporized polonium in the cover gas to prevent its release into the air in scenarios of reactor maintenance and coolant leakage accidents. This paper presents a SiO2 nanofiber membrane prepared based on the electrostatic spinning and calcination process. The SiO2 nanofiber membrane had the advantages of good flexibility, high-temperature resistance, and corrosion resistance. In the trapping experiments, the SiO2 nanofiber membrane filters showed excellent filtration performance at 300~400 °C, and the filtration efficiencies for Te, Pb, and Bi could reach 99%, 99%, and 98%, respectively. Proper filtration temperature and gas flow rate are important to maintain high filtration efficiency. After five cycles, the SiO2 nanofiber membrane filter still exhibited excellent cycle-use performance. In the density functional theory (DFT) calculations, PbPo and PbTe had strong interactions with amorphous SiO2, having adhesion energies of −2.96 to −2.83 eV/molecule.
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