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Chrea S, Takagaki A. Mechanochemical methanolysis of polyethylene terephthalate using calcium oxide as solid base catalyst: a case study. Chem Commun (Camb) 2025; 61:7474-7477. [PMID: 40296559 DOI: 10.1039/d5cc01240f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2025]
Abstract
Dimethyl terephthalate was obtained in a high yield of 83% from polyethylene terephthalate by planetary ball milling with CaO at ambient temperature as a case study. Although the findings cannot be generalized for a broader set of conditions, the optimal reaction parameters, including the catalyst amount, were found to differ significantly from those for a typical heat-driven reaction.
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Affiliation(s)
- Sophea Chrea
- Department of Chemistry, Chemical Engineering and Life Science, College of Engineering Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Atsushi Takagaki
- Division of Materials Science and Chemical Engineering, Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan.
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Gouda A, Merhi N, Hmadeh M, Cecchi T, Santato C, Sain M. Sustainable Strategies for Converting Organic, Electronic, and Plastic Waste From Municipal Solid Waste Into Functional Materials. GLOBAL CHALLENGES (HOBOKEN, NJ) 2025; 9:2400240. [PMID: 40255238 PMCID: PMC12003218 DOI: 10.1002/gch2.202400240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2024] [Revised: 01/22/2025] [Indexed: 04/22/2025]
Abstract
The valorization of municipal solid waste permits to obtain sustainable functional materials. As the urban population burgeons, so does the volume of discarded waste, presenting both a challenge and an opportunity. Harnessing the materials and the latent energy within this solid waste not only addresses the issue of disposal but also contributes to the innovation of functional materials with applications in the energy, electronics, and environment sectors. In this perspective, technologies for converting, after sorting, municipal solid waste into valuable metals, chemicals, and fuels are critically analyzed. Innovative approaches to convert organic waste into functional carbon materials and to create, from plastic and electronic wastes, metal-organic frameworks for energy conversion, storage, and CO2 adsorption and conversion are proposed. Green hydrometallurgy routes that permit the recovery of precious metals avoiding noble metals' oxidative leaching, thus avoiding their downcycling, are also highlighted. The reclaimed precious metals hold promise for use in optoelectronic devices.
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Affiliation(s)
- Abdelaziz Gouda
- Department of Applied Chemistry and Chemical EngineeringUniversity of Toronto80 St. George StreetTorontoONM5S 3H6Canada
- Centre for Biocomposites and Biomaterials ProcessingDivision of ForestryDaniels Faculty of ArchitectureLandscape and DesignUniversity of TorontoTorontoONM5S 3E8Canada
- Department of Mechanical and Industrial EngineeringUniversity of TorontoTorontoONM5S 3G8Canada
| | - Nour Merhi
- Department of ChemistryAmerican University of BeirutRiad El‐Solh, P.O. Box 11‐0236BeirutLebanon
| | - Mohamad Hmadeh
- Department of ChemistryAmerican University of BeirutRiad El‐Solh, P.O. Box 11‐0236BeirutLebanon
| | - Teresa Cecchi
- Istituto Tecnico Tecnologico (ITT) G. and M. MontaniFermo63900Italy
| | - Clara Santato
- Engineering PhysicsPolytechnique MontrealMontrealQCH3T 1J4Canada
| | - Mohini Sain
- Department of Applied Chemistry and Chemical EngineeringUniversity of Toronto80 St. George StreetTorontoONM5S 3H6Canada
- Centre for Biocomposites and Biomaterials ProcessingDivision of ForestryDaniels Faculty of ArchitectureLandscape and DesignUniversity of TorontoTorontoONM5S 3E8Canada
- Department of Mechanical and Industrial EngineeringUniversity of TorontoTorontoONM5S 3G8Canada
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Fu L, Feng K, Li Q, Qin M, Yang J, Zhang X, Chen L, Gong J, Qu J, Niu R. Ion-exchange induced multiple effects to promote uranium uptake from nonmarine water by micromotors. JOURNAL OF HAZARDOUS MATERIALS 2024; 480:136464. [PMID: 39541884 DOI: 10.1016/j.jhazmat.2024.136464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2024] [Revised: 11/02/2024] [Accepted: 11/08/2024] [Indexed: 11/16/2024]
Abstract
As the fundamental resource in nuclear energy, uranium is a sword of two sides, due to its radioactive character that could cause severe impact to the environment and living creatures once released by accident. However, limited by the passive ion transport, the currently available uranium adsorbents still suffer from low adsorption kinetics and capacity. Here, we report a self-driven modular micro-reactor composed of magnetizable ion-exchange resin and adsorbents that can be used to dynamically remove uranium from nonmarine waters. Because of the long-range pH gradient and phoretic flow established by the recyclable ion-exchange resin, the micro-reactor shows a fast uranium adsorption rate and reaches a uranium extraction capacity of 629.3 mg g-1 within 10 min in 30 ppm uranium solution, as well as good recyclability in repeated use. Numerical simulation result confirms that the phoretic flow and electric field accelerate uranium transport to the adsorbent. Our work provides a new solution for the removal of radioactive uranium with high efficiency.
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Affiliation(s)
- Linhui Fu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, State Key Laboratory of Materials Processing and Die & Mould Technology, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Kai Feng
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, State Key Laboratory of Materials Processing and Die & Mould Technology, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Qianqian Li
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, State Key Laboratory of Materials Processing and Die & Mould Technology, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Mengting Qin
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, State Key Laboratory of Materials Processing and Die & Mould Technology, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jing Yang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, State Key Laboratory of Materials Processing and Die & Mould Technology, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xinle Zhang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, State Key Laboratory of Materials Processing and Die & Mould Technology, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Ling Chen
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, State Key Laboratory of Materials Processing and Die & Mould Technology, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jiang Gong
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, State Key Laboratory of Materials Processing and Die & Mould Technology, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jinping Qu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, State Key Laboratory of Materials Processing and Die & Mould Technology, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Ran Niu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, State Key Laboratory of Materials Processing and Die & Mould Technology, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan 430074, China.
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Zhang W, Han Y, Yang F, Guan L, Lu F, Mao S, Tian K, Yao M, Qin HM. A customized self-assembled synergistic biocatalyst for plastic depolymerization. JOURNAL OF HAZARDOUS MATERIALS 2024; 477:135380. [PMID: 39088944 DOI: 10.1016/j.jhazmat.2024.135380] [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: 06/17/2024] [Revised: 07/26/2024] [Accepted: 07/29/2024] [Indexed: 08/03/2024]
Abstract
The enzymatic degradation of plastic offers a green, sustainable strategy and scalable circular carbon route for solving polyester waste. Among the earlies discovered plastic-degrading enzymes are PET hydrolase (PETase) and MHET hydrolase (MHETase), which act synergistically. To promote the adsorption of enzymes on PET surfaces, increase their robustness, and enable directly depolymerization, we designed hydrophobin HFBI fused-PETase and MHETase. A customized self-assembled synergistic biocatalyst (MC@CaZn-MOF) was further developed to promote the two-step depolymerization process. The tailored catalysts showed better adhesion to the PET surface and desirable durability, retaining over 70% relative activity after incubation at pH 8.0 and 60 °C for 120 h. Importantly, MC@CaZn-MOF could directly decompose untreated AGf-PET to generate 9.5 mM TPA with weight loss over 90%. The successful implementation of a bifunctional customized catalyst makes the large-scale biocatalytic degradation of PET feasible, contributing to polymer upcycling and environmental sustainability.
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Affiliation(s)
- Wei Zhang
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology; National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, China
| | - Yuying Han
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology; National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, China
| | - Feng Yang
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology; National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, China
| | - Lijun Guan
- Institute of Food Processing, Heilongjiang Academy of Agricultural Sciences, Harbin, China
| | - Fuping Lu
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology; National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, China
| | - Shuhong Mao
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology; National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, China
| | - Kangming Tian
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology; National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, China.
| | - Mingdong Yao
- Key Laboratory of Systems Bioengineering (Ministry of Education); School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
| | - Hui-Min Qin
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology; National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, China.
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Cheng H, Li J, Meng T, Shu D. Advances in Mn-Based MOFs and Their Derivatives for High-Performance Supercapacitor. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308804. [PMID: 38073335 DOI: 10.1002/smll.202308804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/19/2023] [Indexed: 05/18/2024]
Abstract
As the most widely used metal material in supercapacitors, manganese (Mn)-based materials possess the merits of high theoretical capacitance, stable structure as well as environmental friendliness. However, due to poor conductivity and easy accumulation, the practical capacitance of Mn-based materials is far lower than that of theoretical value. Therefore, accurate structural adjustment and controllable strategies are urgently needed to optimize the electrochemical properties of Mn-based materials. Metal-organic frameworks (MOFs) are porous materials with high specific surface area (SSA), tunable pore size, and controllable structure. These features make them attractive as precursors or scaffold for the synthesis of metal-based materials and composites, which are important for electrochemical energy storage applications. Therefore, a timely and comprehensive review on the classification, design, preparation and application of Mn-based MOFs and their derivatives for supercapacitors has been given in this paper. The recent advancement of Mn-based MOFs and their derivatives applied in supercapacitor electrodes are particularly highlighted. Finally, the challenges faced by Mn-MOFs and their derivatives for supercapacitors are summarized, and strategies to further improve their performance are proposed. The aspiration is that this review will serve as a beneficial compass, guiding the logical creation of Mn-based MOFs and their derivatives in the future.
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Affiliation(s)
- Honghong Cheng
- School of Chemistry and Materials Science, Guangdong University of Education, Guangzhou, 510800, P. R. China
| | - Jianping Li
- School of Chemistry and Materials Science, Guangdong University of Education, Guangzhou, 510800, P. R. China
| | - Tao Meng
- School of Chemistry, South China Normal University, Guangzhou, 510006, P. R. China
| | - Dong Shu
- School of Chemistry, South China Normal University, Guangzhou, 510006, P. R. China
- National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs, South China Normal University, Guangzhou, 510006, P. R. China
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Chan K, Zinchenko A. Functional upcycling of waste PET plastic to the hybrid magnetic microparticles adsorbent for cesium removal. CHEMOSPHERE 2024; 354:141725. [PMID: 38492679 DOI: 10.1016/j.chemosphere.2024.141725] [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: 12/26/2023] [Revised: 03/03/2024] [Accepted: 03/13/2024] [Indexed: 03/18/2024]
Abstract
Accumulation of mismanaged plastic in the environment and the appearance of emerging plastic-derived pollutants such as microplastics strongly demand technologies for waste plastic utilization. In this study, polyethylene terephthalate (PET) from waste plastic bottles was directly utilized to prepare a matrix of an adsorbent for cesium (Cs+) removal. The organic matrix of PET-derived oligomers obtained by aminolysis depolymerization was impregnated with bentonite clay and magnetite nanoparticles (Fe3O4 NPs), playing the roles as a major adsorptive medium for Cs+ removal and as a functional component to primarily provide efficient separation of the hybrid adsorbent from aqueous system, respectively. The obtained hybrid composite microparticles were next tested as an adsorbent for the removal of Cs+ cation from aqueous solutions. The adsorption process was characterized by fast kinetics reaching ca. 60% of the equilibrium adsorption capacity within 5 min and the maximum adsorption capacity toward Cs+ was found to be 26.8 mg/g. The adsorption process was primarily dominated by the cationic exchange in bentonite, which was not significantly affected by the admixture of the competing mono- and divalent cations (Na+, K+, and Mg2+). The proposed approach here exploits the sustainable utilization scenario of plastic waste-derived material to template complex multifunctional nanocomposites that can find applications for pollution cleaning and environmental remediation.
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Affiliation(s)
- Kayee Chan
- Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan.
| | - Anatoly Zinchenko
- Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan.
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