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Katare A, Sikha S, Mandal B. Synergistic enhancement of CO 2/N 2 separation performance via Ce-MOF-infused chitosan mixed matrix membrane. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-33061-y. [PMID: 38561537 DOI: 10.1007/s11356-024-33061-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 03/20/2024] [Indexed: 04/04/2024]
Abstract
Reticular chemistry, exemplified by metal-organic frameworks (MOFs), has proven invaluable in creating porous materials with finely tuned structures to address critical global energy and environmental challenges. In this context, the need for efficient carbon dioxide (CO2) capture and utilization has taken center stage. One promising approach involves the integration of MOFs into polymer matrix to develop mixed matrix membranes (MMMs). In this work, cerium-based MOFs (Ce-MOF) were selected due to their robust CO2 capture capabilities, while chitosan (CS) was chosen as the polymer matrix due to its reasonably good selectivity and balanced CO2 permeance for the development of MMMs for CO2/N2 (20/80 vol%) separation. A comprehensive suite of analytical techniques, including FTIR, XRD, FESEM, XPS, TGA, EDX, FETEM, and BET, was applied for precise characterization of both the MOF and MMMs. Various operational parameters, such as Ce-MOF content and temperature, were systematically explored to investigate the CO2 capture efficiency of the synthesized MMMs. The results revealed that the optimized Ce-MOF-embedded CS MMMs consistently outperformed the bare CS membranes.
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Affiliation(s)
- Aviti Katare
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Sikha Sikha
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Bishnupada Mandal
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India.
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Wu X, Wang J, Lei Y, He H, Lei Z, Huang X, Xiao H, Wu G, Zeng Z, Wang Y, Huang L, Shen F, Deng S, Gao X, Fang Z, Fang D. Restricted reaction of layered double hydroxide nanoparticles with phosphate in a confined microsphere space. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 913:169720. [PMID: 38171457 DOI: 10.1016/j.scitotenv.2023.169720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 12/25/2023] [Accepted: 12/25/2023] [Indexed: 01/05/2024]
Abstract
Over the past decades, considerable efforts have been made to find useful solutions for phosphate pollution control. The state transition of nanomaterials from freely dispersed to encapsulated provides a realizable route for their application in phosphate elimination. The separation convenience offered by encapsulation has been widely recognized, however, the unique binding mode of nanostructures and phosphate in the confined space remains unclear, limiting its further development. Here, carboxymethyl cellulose (CMC) microspheres were used as hosts to deploy layered double hydroxide (LDH) nanoparticles. On this basis, we described an attempt to explore the adsorption behavior of LDH and phosphate in the microsphere space. Compared to their freely dispersed analogues, LDH particles exhibited higher structural stability, wider pH adaptability, and better phosphate selectivity when spatially confined in the CMC microsphere. Nevertheless, the kinetic process was severely inhibited by three orders of magnitude. Besides, the saturated phosphate adsorption capacity was also reduced to 74.6 % of the freely dispersed system. A combinative characterization revealed that the highly electronegative CMC host not only causes electrostatic repulsion to phosphate, but also extracts the electron density of the metal center of LDH, weakening its ability to act as a Lewis acid site for phosphate binding. Meanwhile, the microsphere encapsulation also hinders the ion exchange function of interlayer anions and phosphate. This study offers an objective insight into the reaction of LDH and phosphate in the confined microsphere space, which may contribute to the advanced design of encapsulation strategies for nanoparticles.
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Affiliation(s)
- Xingyu Wu
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
| | - Jingyi Wang
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
| | - Yuantong Lei
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
| | - Haoyang He
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
| | - Zhibo Lei
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
| | - Xinjuan Huang
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
| | - Hong Xiao
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
| | - Ganxue Wu
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
| | - Zhenxing Zeng
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
| | - Yingjun Wang
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
| | - Liping Huang
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
| | - Fei Shen
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China; Sichuan Provincial Engineering Center of Agricultural Environmental Pollution Control, Sichuan Agricultural University, Chengdu 611130, China
| | - Shihuai Deng
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China; Sichuan Provincial Engineering Center of Agricultural Environmental Pollution Control, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaoping Gao
- Fuzhou Planning and Design Research Institute Group Co., LTD, Fuzhou 350100, China.
| | - Zhuoyao Fang
- School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Dexin Fang
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China.
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Fang X, Zhang D, Chang Z, Li R, Meng S. Phosphorus removal from water by the metal-organic frameworks (MOFs)-based adsorbents: A review for structure, mechanism, and current progress. ENVIRONMENTAL RESEARCH 2024; 243:117816. [PMID: 38056614 DOI: 10.1016/j.envres.2023.117816] [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: 10/17/2023] [Revised: 11/14/2023] [Accepted: 11/27/2023] [Indexed: 12/08/2023]
Abstract
Efficacious phosphate removal is essential for mitigating eutrophication in aquatic ecosystems and complying with increasingly stringent phosphate emission regulations. Chemical adsorption, characterized by simplicity, prominent treatment efficiency, and convenient recovery, is extensively employed for profound phosphorus removal. Metal-organic frameworks (MOFs)-derived metal/carbon composites, surpassing the limitations of separate components, exhibit synergistic effects, rendering them tremendously promising for environmental remediation. This comprehensive review systematically summarizes MOFs-based materials' properties and their structure-property relationships tailored for phosphate adsorption, thereby enhancing specificity towards phosphate. Furthermore, it elucidates the primary mechanisms influencing phosphate adsorption by MOFs-based composites. Additionally, the review introduces strategies for designing and synthesizing efficacious phosphorus capture and regeneration materials. Lastly, it discusses and illuminates future research challenges and prospects in this field. This summary provides novel insights for future research on superlative MOFs-based adsorbents for phosphate removal.
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Affiliation(s)
- Xiaojie Fang
- Department of Resources and Environmental Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
| | - Di Zhang
- Department of Resources and Environmental Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China; Key Laboratory of Black Soil Protection and Restoration, Harbin, Heilongjiang, 150030, China.
| | - Zhenfeng Chang
- Department of Resources and Environmental Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
| | - Ruoyan Li
- Department of Resources and Environmental Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
| | - Shuangshuang Meng
- Department of Resources and Environmental Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
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