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Towards an integrated pelagic and benthic analysis of long-term coastal eutrophication (Guanabara Bay, Brazil)

Environmental Advances 2024年 15卷

作者： Muniz, Jaqueline Sá Earp Abuchacra, Rodrigo Coutinho Peixoto, Fernando Cunha Abuchacra, Paula Ferreira Falheiro Sanders, Christian J. Salgado, Carla Maciel Baptista Neto, José Antônio Amora-Nogueira, Leonardo Cordeiro, Renato Campello Moreira, Luciane Silva Pinho, Luana Valentin, Jean Louis Faustino, Allana Fonseca-Oliveira, Ana Pio, Douglas Motta Carvalho, Manuela Lima Pinto, Samira Cristina de Souza Machado, Wilson Gomes, Luiz Eduardo de Oliveira Marotta, Humberto Chemical Engineering Graduate Program Universidade Federal Fluminense (UFF) Rua Passo da Pátria 156 RJ Niterói 24210-240 Brazil Ecosystems and Global Change Laboratory (LEMG-UFF) / International Laboratory of Global Change (LINCGlobal) Biomass and Water Management Research Center (NAB-UFF) Graduate Program in Geosciences (Environmental Geochemistry) Universidade Federal Fluminense (UFF) Av. Edmundo March s/n° RJ Niterói 24210-310 Brazil Department of Geography Graduate Program in Geography Universidade do Estado do Rio de Janeiro (UERJ-FFP) Rua Dr Francisco Portela 1470 São Gonçalo Rio de Janeiro 24435-005 Brazil Instituto Militar de Engenharia (IME) Praça General Tibúrcio 80 Praia Vermelha Rio de Janeiro 22290-270 Brazil Physical Geography Laboratory (LAGEF-UFF) Department of Geography Graduate Program in Geography Universidade Federal Fluminense (UFF) Av. Gal. Milton Tavares de Souza s/n° RJ Niterói 24210-346 Brazil National Marine Science Centre Faculty of Science and Engineering Southern Cross University Coffs Harbour 2450 NSW Australia Department of Geology and Geophysics/LAGEMAR Universidade Federal Fluminense (UFF) Av. General Milton Tavares de Souza s/n RJ Niterói 24210-346 Brazil Department of Chemical Oceanography Rio de Janeiro State University Pavilhão João Lyra Filho sala 4008 Bloco E Rua São Francisco Xavier 524 Maracanã – RJ 20550-900 Brazil Department of Marine Biology Federal University of Rio de Janeiro Rio de Janeiro Brazil NGO Guardiões do Mar Rua Alfredo Azamor 739 Boa Vista RJ São Gonçalo 24466-000 Brazil Silvestrum Climate Associates L.L.C. 1 Lower Crescent Ave Sausalito CA United States

Coastal ecosystems are important destinations for natural and anthropogenic inputs, areas experiencing eutrophication from untreated sewage globally. However, the mechanistic link of how coastal waters and sediments can jointly respond to nutrient enrichment, especially nitrogen (N) and phosphorus (P), remains relatively unknown. Here, we assessed the interdecadal variability in N and P contents, comparing four surface water sampling sites (∼40-year monthly concentrations) and three ²¹⁰Pb dated sediment cores (∼70-years) in an urban bay that has received increasingly high untreated sewage discharges over the past century (Guanabara Bay, Brazil). Major eutrophication was found, with differences between waters and sediments along sampling sites. The water concentrations of total phosphorus (TP) and dissolved inorganic nitrogen (DIN) yielded on average ∼10–45 % and ∼40–190 % higher in 2005–2017 compared to 1980–2005 period in the sampling site most influenced by the denser urban than the conserved area, respectively. Furthermore, 6-year average water concentrations indicated both recent initial decreases in the most urban area, potentially associated with new sanitation facilities, and high increases in those relatively more conserved areas. Conversely, TP and TN sediment burial rates were less sensitive to recent changes as compared to the water concentrations, yielding ∼11 and 31 % between 1980–2005 and 2005–2017, respectively, of which also provided baselines data for earlier periods without direct pelagic measurements (i.e., 1950–1980). Thus, these findings offer new insights into substantial temporal and intra-ecosystem spatial variability of coastal eutrophication, indicating that an integrated analysis between water monitoring and sediment burial is needed to improve the diagnosis and prediction capabilities necessary for effective long-term mitigation of coastal aquatic eutrophication worldwide. © 2023

关键词： 210Pb dating Coastal eutrophication Sediment burial Urban bay Water monitoring

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Evaluation of Artificial Neural Network Models for Predictive Monitoring of Biogas Production from Cassava Wastewater: Comparison of Training Algorithms

SSRN

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SSRN 2022年

作者： Cruz, Ianny Andrade Nascimento, Victor Ruan Silva Felisardo, Raul José Alves dos Santos, Ataíde Mateus Gualberto de Jesus, Anderson Alles de Vasconcelos, Bruna Rego Bilal, Muhammad Cavalcanti, Eliane Bezerra de Souza, Ranyere Lucena Ferreira, Luiz Fernando Romanholo Graduate Program in Process Engineering Tiradentes University Av. Murilo Dantas 300 Farolândia SE Aracaju49032-490 Brazil Programa de Pós-Graduação em Engenharia Elétrica Universidade Federal de Sergipe Av. Marechal Rondon s/n Jd. Rosa ElzeSE São Cristóvão49100-000 Brazil Universidade Federal do Maranhão Campus Balsas MA Balsas65800-000 Brazil Biomass Technology Laboratory Department of Chemical Engineering and Biotechnology Engineering Université de Sherbrooke 2500 Boul. de L’Université SherbrookeQCJ1K 2R1 Canada Huaiyin Institute of Technology China Institute of Technology and Research Av. Murilo Dantas 300SE Farolândia Aracaju49032-490 Brazil

In this study, machine learning integrated based models for predicting cumulative biogas from anaerobic digestion (AD) of cassava wastewater were developed using artificial neural networks (ANNs). Biogas generation was investigated for 21 days with and without the inclusion of calcium particles from milled calcined chicken waste as a low-cost substitute for buffering. Digestion time, pH, and calcium eggshell-based concentration were selected as input features for biogas prediction through the implementation of the ANN approach. Moreover, seven different training algorithms were used to train the model, and a genetic algorithm (GA) was also implemented to optimize the ANN architecture, resulting in faster learning and higher prediction performance. Given the data set, the Levenberg-Marquardt algorithm with a hyperbolic tangent as a transfer function to the hidden and output layers was the most efficient model in predicting the biogas produced with an R-value of 0.9999. © 2022, The Authors. All rights reserved.

关键词： Biogas

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Gold Nanoparticle Decorated Bismuth Vanadate Casting on Screen-Printed Electrode for Chlortetracycline Detection in Tap Water

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SSRN 2024年

作者： Ngo, Duy Ba Gopi, Praveen Kumar Rajkumar, Muniyandi Chen, Shen-Ming Rijiravannich, Patsamon Khownarumit, Porntip Somasundrum, Mithran Surareungchai, Werasak Bangkhuntien-chaitalay Rd. Bangkok10150 Thailand Analytical Sciences and National Doping Test Institute Mahidol University Rama VI Rd. Bangkok10400 Thailand Electroanalysis and Bioelectrochemistry Lab Department of Chemical Engineering and Biotechnology National Taipei University of Technology No.1 Section 3 Chung-Hsiao East Rd. Taipei106 Taiwan Bioscience and System Biology Research Team National Center for Genetic Engineering and Biotechnology National Sciences and Technology Development Agency at KMUTT Bangkhuntien-chaitalay Rd. Bangkok10150 Thailand Pilot Plant Development and Training Institute KMUTT Bangkhuntien-chaitalay Rd. Bangkok10150 Thailand Nanoscience and nanotechnology graduate program Faculty of Science KMUTT Pracha Uthit Rd. Bangkok10140 Thailand PSG College of Arts and Science Civil Aerodrome Post Tamil Nadu Coimbatore641014 India Quarter 6 Linh Trung Ward Thu Duc City Ho Chi Minh City720400 Viet Nam

Background Chlortetracycline (CTC) belongs to the class of tetracycline’s compounds, which is known for its antibacterial activity. CTC was largely consumed by farm animals than humans, which leads to the growth antibiotic – resistant bacteria and environmental contamination. So far no one reported the electrochemical detection and determination of CTC by using AuNPs@BiVO4 composite. Some reports have been reported using conventional chromatography which is most expensive, time-consuming and highly equipped method. Results Here, we report a simple method for preparing gold nanoparticle decorated bismuth vanadate (AuNPs@BiVO4), which was dropped cast on a screen-printed carbon electrode (SPCE). The AuNPs@BiVO4 and AuNPs@BiVO4/SPCE materials were characterized using TEM, SEM-EDX, XPS, DLS, ELS, EIS, and CV. The as-prepared AuNPs@BiVO4/SPCE was used to detect and determine chlortetracycline (CTC) by different pulse potentials in phosphate buffer pH 7.0. The electrode possessed a wide linear range of 0.99 – 19.06 µM, with obtained LOD = 0.15 µM, LOQ = 0.49 µM, and sensitivity = 0.059 μA μM-1 cm-2. It also exhibited good selectivity, stability, and repeatability, recovering 87.14% - 100% for detecting CTC in Mili Q and tap water. Significance Facile and rapid synthesis of AuNPs@BiVO4 nanocomposite film modified electrode at physiological pH conditions has been prepared and A highly electrochemical detection and determination of CTC using AuNPs@BiVO4 nanocomposite film has been developed for the first time. Thus, the proposed electrode could be applied for the detection and determination of CTC in water sources and has the potential to be used for real sample analysis. © 2024, The Authors. All rights reserved.

关键词： Nanocomposites

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Smart polymeric materials applied to industry 4.0: A review on electrochromic textiles

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AIP Conference Proceedings 2020年第1期2289卷

作者： Heloisa Ramlow Karina Luzia Andrade Cintia Marangoni Ricardo Machado 1Graduate Program in Chemical Engineering Federal University of Santa Catarina Universitário Reitor João David Ferreira Lima Campus 88040-900 Florianópolis Santa Catarina Brazil

Smart polymeric materials are vital to Industry 4.0 for the development of new technologies in order to gather data in real-time, providing useful information to the manufacturing system. In this context, electrochromic textiles have been researched with innovative applications for information monitoring. Electrochromic textiles are reported to reversibly switch colors through the incorporation of several conducting polymers, while the flexibility and stretchability are provided by the polymeric fiber. The scope of electrochromic technologies can be extended to different polymeric fibers, such as poly(amide) and poly(methyl methacrylate). Electrochromic textiles have been explored due to their promising applications in sensing, detecting, and displaying. This work aims to present and discuss the overall usability of electrochromic textiles by reviewing recent developments which have been done in order to straighten the path for future researches in this field. The current state-of-the-art shows that researchers are seeking an approach to obtain electro-stimulated response smart textiles having frequency response, high precision and excellent discoloration ability, meanwhile without changing the normal fabric properties. The possible application of electrochromic textiles for the development of Industry 4.0 is discussed. Despite the great technological evolution until this moment, there is still too much to be explored and discovered in the field of electrochromic textiles with potential application for the expansion of Industry 4.0.

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Fast Water Transport in UTSA-280 via a Knock-Off Mechanism

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Angewandte Chemie 2023年第39期135卷

作者： Cheng-Hsun Hsu Hsin-Yu Yu Ho Jun Lee Pei-Hao Wu Shing-Jong Huang Jong Suk Lee Tsyr-Yan Yu Yi-Pei Li Dun-Yen Kang Department of Chemical Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei 10617 Taiwan Department of Chemical and Biomolecular Engineering Sogang University Baekbeom-ro 35 Mapo-gu Seoul 04107 Republic of Korea Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan Instrumentation Center National Taiwan University Taipei 10617 Taiwan Institute of Emergent Materials Sogang University 35 Baekbeom-ro Mapo-gu Seoul 04107 Republic of Korea International Graduate Program of Molecular Science and Technology (NTU-MST) National Taiwan University Taipei 10617 Taiwan Molecular Science and Technology Program Taiwan International Graduate Program (TIGP) Academia Sinica Taipei 11529 Taiwan Center of Atomic Initiative for New Materials National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei 10617 Taiwan

Water and other small molecules frequently coordinate within metal-organic frameworks (MOFs). These coordinated molecules may actively engage in mass transfer, moving together with the transport molecules, but this phenomenon has yet to be examined. In this study, we explore a unique water transfer mechanism in UTSA-280, where an incoming water molecule can displace a coordinated molecule for mass transfer. We refer to this process as the “knock-off” mechanism. Despite UTSA-280 possessing one-dimensional channels, the knock-off transport enables water movement along the other two axes, effectively simulating a pseudo-three-dimensional mass transfer. Even with a relatively narrow pore width, the knock-off mechanism enables a high water flux in the UTSA-280 membrane. The knock-off mechanism also renders UTSA-280 superior water/ethanol diffusion selectivity for pervaporation. To validate this unique mechanism, we conducted 1 H and 2 H solid-state NMR on UTSA-280 after the adsorption of deuterated water. We also derived potential energy diagrams from the density functional theory to gain atomic-level insight into the knock-off and the direct-hopping mechanisms. The simulation findings reveal that the energy barrier of the knock-off mechanism is marginally lower than the direct-hopping pathway, implying its potential role in enhancing water diffusion in UTSA-280.

关键词： Diffusion Knock-off Mechanism Membrane Metal-Organic Frameworks Water Transport

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Improvement of extracellular polysaccharides production from Cordyceps militaris immobilized alginate beads in repeated-batch fermentation

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LWT 2024年 193卷

作者： Hou, Shi-Jing Cheng, Kuan-Chen Lin, Shyh-Hsiang Hsiao, I-Lun Santoso, Shella Permatasari Singajaya, Stephanie Chou, Yu-Chieh Lin, Shin-Ping Master Program in Food Safety Taipei Medical University 250 Wu-Hsing Street Taipei11031 Taiwan Institute of Biotechnology National Taiwan University 1 Roosevelt Rd. Sec. 4 Taipei10617 Taiwan Graduate Institute of Food Science and Technology National Taiwan University 1 Roosevelt Rd. Sec. 4 Taipei10617 Taiwan Department of Medical Research China Medical University Hospital China Medical University 91 Hsueh-Shih Rd. Taichung40402 Taiwan Department of Optometry Asia University 500 Lioufeng Rd. Wufeng Taichung41354 Taiwan School of Nutrition and Health Sciences Taipei Medical University 250 Wu-Hsing Street Taipei11031 Taiwan School of Food Safety Taipei Medical University 250 Wu-Hsing Street Taipei11031 Taiwan Department of Chemical Engineering Widya Mandala Surabaya Catholic University Kalijudan 37 East Java Surabaya60114 Indonesia Collaborative Research Center for Sustainable and Zero Waste Industries Kalijudan 37 East Java Surabaya60114 Indonesia Ph.D. Program in Drug Discovery and Development Industry Taipei Medical University 250 Wu-Hsing Street Taipei11031 Taiwan Research Center of Biomedical Device Taipei Medical University 250 Wu-Hsing Street Taipei11031 Taiwan TMU Research Center for Digestive Medicine Taipei Medical University 250 Wu-Hsing Street Taipei11031 Taiwan

Cordyceps militaris (C. militaris) is a unique medicinal fungus of the genus Cordyceps. It has high economic value due to various biological functions from the extracellular polysaccharides (EPSs) it produces. The aim of this study was to establish a mycelium-immobilization system for EPS production in a bubble column system. First, EPS production was optimized by 90.2% (from 0.72 to 1.37 g/L) using response surface methodology under an alginate-immobilized mycelium system with 6 days of cultivation. The highest EPS production was obtained (5.3 g/L) in a flask system through elongation to 15 days of cultivation. EPS production subsequently further increased to 10.42 g/L utilizing a bubble column reactor. Furthermore, the system can be reused for at least three rounds. In the EPS characteristics analysis, the produced EPSs were mainly composed of glucose and galactose. They presented strong antibacterial activity against Staphylococcus aureus. In terms of antioxidant activity, respective the EPS concentration that caused 50% scavenging of DPPH and ABTS free radicals values (IC50) were 4.65 and 7.92 mg/mL. In summary, these findings should be helpful for establishing a suitable industrial fermentation system for C. militaris and can be studied in the food and medical industries in future work. © 2024 The Authors

关键词： Mycelium

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Room-temperature polar metal stabilized under high pressure

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Physical Review B 2020年第22期101卷 220101(R)-220101(R)页

作者： J.-J. Gao S.-Y. Fu K. Yamaura J. F. Lin J.-S. Zhou Materials Science and Engineering Program Mechanical Engineering The University of Texas at Austin Austin Texas 78712 USA Institute of Fluid Physics China Academy of Engineering Physics Mianyang 621900 China Department of Geological Sciences The University of Texas at Austin Austin Texas 78712 USA International Center for Materials Nanoarchitectronics (WPI-MANA) National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan Graduate School of Chemical Sciences and Engineering Hokkaido University North 10 West 8 Kita-ku Sapporo Hokkaido 060-0810 Japan

LiOsO3 synthesized under high pressure in recent years is a rare metal since it undergoes a nonpolar to polar phase transition at Ts=140K. Forming a polar axis through a phase transition in a metal seems against common sense. It is also not clear whether the transition to a polar phase in the oxide fits the mechanism predicted by Anderson and Blount in 1965. As monitored by an anomaly of resistivity in LiOsO3 at Ts reported recently, Ts increases under pressure. The structural study under high pressure could give us a useful clue for understanding how dipoles form in this metallic oxide. Here, we report the identification of a polar phase of LiOsO3 at room temperature under high pressure by using in situ probes of Raman and synchrotron x-ray diffraction. In the Raman study, the pressure-induced modes and their responses to polarized light, the linewidth change, the peak profile change, and mode softening have been directly compared with the corresponding changes of LiOsO3 on cooling through Ts at ambient pressure. Whereas a complete set of Raman modes from the R3c phase can be found at P≥15.5GPa, a Raman mode of the R3c phase appears in the R3¯c phase at 4.11 GPa. A significant drop in the linewidth occurs at 12.6 GPa that coincides with the critical pressure for the phase transition to the polar phase detected by x-ray diffraction. Fitting the peak profile of a Raman mode to the Fano formula also indicates a clear change of electron-phonon coupling at 16 GPa. In contrast to a sharp structural transition to the polar phase at Ts under ambient pressure, our results reveal all the structural ingredients to facilitate the polar phase over a broad range of pressure. A bond valence sum analysis has been introduced to reveal the local structural instability under pressure. The transition to the polar phase in metallic LiOsO3 is solely caused by optimizing the local structure in order to make the bond valence sum close to the formal valence of the Li ion.

关键词： Ferroelectricity Phase transitions Pressure effects Metals

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Mixed-linker strategy for suppressing structural flexibility of metal-organic framework membranes for gas separation

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Communications Chemistry 2023年第1期6卷 1-12页

作者： Chung-Kai Chang Yen-Chun Lin Yi-Pei Li Dun-Yen Kang Ting-Rong Ko Tsai-Yu Lin Heng-Liang Wu Hyun Jung Yu Jong Suk Lee Department of Chemical Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei 10617 Taiwan International Graduate Program of Molecular Science and Technology National Taiwan University (NTU-MST) No. 1 Sec. 4 Roosevelt Road Taipei 10617 Taiwan Center of Atomic Initiative for New Materials National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei 10617 Taiwan Center for Condensed Matter Sciences National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei 10617 Taiwan Department of Chemical and Biomolecular Engineering Sogang University Baekbeom-ro 35 Mapo-gu Seoul 04107 Republic of Korea

Structural flexibility is a critical issue that limits the application of metal-organic framework (MOF) membranes for gas separation. Herein we propose a mixed-linker approach to suppress the structural flexibility of the CAU-10-based (CAU = Christian-Albrechts-University) membranes. Specifically, pure CAU-10-PDC membranes display high separation performance but at the same time are highly unstable for the separation of CO2/CH4. A partial substitution (30 mol.%) of the linker PDC with BDC significantly improves its stability. Such an approach also allows for decreasing the aperture size of MOFs. The optimized CAU-10-PDC-H (70/30) membrane possesses a high separation performance for CO2/CH4(separation factor of 74.2 and CO2permeability of 1,111.1 Barrer under 2 bar of feed pressure at 35°C). A combination of in situ characterization with X-ray diffraction (XRD) and diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy, as well as periodic density functional theory (DFT) calculations, unveils the origin of the mixed-linker approach to enhancing the structural stability of the mixed-linker CAU-10-based membranes during the gas permeation tests.

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Emerging contaminants:A One Health perspective

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The Innovation 2024年第4期5卷 140-170,139页

作者： Fang Wang Leilei Xiang Kelvin Sze-Yin Leung Martin Elsner Ying Zhang Yuming Guo Bo Pan Hongwen Sun Taicheng An Guangguo Ying Bryan WBrooks Deyi Hou Damian EHelbling Jianqiang Sun Hao Qiu Timothy MVogel Wei Zhang Yanzheng Gao Myrna JSimpson Yi Luo Scott XChang Guanyong Su Bryan MWong Tzung-May Fu Dong Zhu Karl JJobst Chengjun Ge Frederic Coulon Jean Damascene Harindintwali Xiankui Zeng Haijun Wang Yuhao Fu Zhong Wei Rainer Lohmann Changer Chen Yang Song Concepcion Sanchez-Cid Yu Wang Ali El-Naggar Yiming Yao Yanran Huang Japhet Cheuk-Fung Law Chenggang Gu Huizhong Shen Yanpeng Gao Chao Qin Hao Li Tong Zhang Natàlia Corcoll Min Liu Daniel SAlessi Hui Li Kristian KBrandt Yolanda Pico Cheng Gu Jianhua Guo Jianqiang Su Philippe Corvini Mao Ye Teresa Rocha-Santos Huan He Yi Yang Meiping Tong Weina Zhang Fidèle Suanon Ferdi Brahushi Zhenyu Wang Syed AHashsham Marko Virta Qingbin Yuan Gaofei Jiang Louis A.Tremblay Qingwei Bu Jichun Wu Willie Peijnenburg Edward Topp Xinde Cao Xin Jiang Minghui Zheng Taolin Zhang Yongming Luo Lizhong Zhu Xiangdong Li DamiàBarceló Jianmin Chen Baoshan Xing Wulf Amelung Zongwei Cai Ravi Naidu Qirong Shen Janusz Pawliszyn Yong-guan Zhu Andreas Schaeffer Matthias C.Rillig Fengchang Wu Gang Yu James M.Tiedje State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry Hong Kong Baptist UniversityHong KongChina HKBU Institute of Research and Continuing Education Shenzhen Virtual University ParkShenzhenChina Technical University of Munich TUM School of Natural SciencesInstitute of Hydrochemistry85748 GarchingGermany School of Resources&Environment Northeast Agricultural UniversityHarbin 150030China Climate Air Quality Research UnitSchool of Public Health and Preventive MedicineMonash UniversityMelbourneVICAustralia Faculty of Environmental Science&Engineering Kunming University of Science&TechnologyKunming 650500China Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and EngineeringNankai UniversityTianjin 300350China Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control School of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Ministry of Education Key Laboratory of Environmental Theoretical Chemistry South China Normal UniversityGuangzhouGuangdong 510006China Department of Environmental Science Baylor UniversityWacoTXUSA Center for Reservoir and Aquatic Systems Research(CRASR) Baylor UniversityWacoTXUSA School of Environment Tsinghua UniversityBeijing 100084China School of Civil and Environmental Engineering Cornell UniversityIthacaNY 14853USA Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province Zhejiang University of TechnologyHangzhou 310014China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Laboratoire d’Ecologie Microbienne Universite Claude Bernard Lyon 1UMR CNRS 5557UMR INRAE 1418VetAgro Sup69622 VilleurbanneFrance Department of Pla

Environmental pollution is escalating due to rapid global development that often prioritizes human needs over planetary *** global efforts to mitigate legacy pollutants,the continuous introduction of new substances remains a major threat to both people and the *** response,global initiatives are focusing on risk assessment and regulation of emerging contaminants,as demonstrated by the ongoing efforts to establish the UN’s Intergovernmental Science-Policy Panel on chemicals,Waste,and Pollution *** review identifies the sources and impacts of emerging contaminants on planetary health,emphasizing the importance of adopting a One Health *** for monitoring and addressing these pollutants are discussed,underscoring the need for robust and socially equitable environmental policies at both regional and international *** actions are needed to transition toward sustainable pollution management practices to safeguard our planet for future generations.

关键词： pollution planet contaminants

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Mixed-linker MOF-303 membranes for pervaporation

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Journal of Membrane Science Letters 2023年第2期3卷

作者： Fang-Hsuan Hu Li-Tang Chi Guan-Bo Syu Tsyr-Yan Yu Ming-Pei Lin Jiun-Jen Chen Wen-Yueh Yu Dun-Yen Kang Department of Chemical Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei 10617 Taiwan Institute of Atomic and Molecular Sciences Academia Sinica No. 1 Sec. 4 Roosevelt Road Taipei 10617 Taiwan International Graduate Program of Molecular Science and Technology National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei 10617 Taiwan Green Energy and Environment Research Laboratories Industrial Technology Research Institute No. 195 Sec. 4 Chung Hsing Road Hsinchu 31040 Taiwan

Metal-organic frameworks (MOFs) hold great promise as porous materials for pervaporation applications. However, the exploration of MOF membranes in this field is still in its early stages. One of the main challenges is the relatively low mass flux and stability of pure MOF membranes compared to other materials used in pervaporation. In this study, we propose a novel approach to enhance the separation performance of MOF membranes for water and ethanol separation. Our strategy involves incorporating the 2,5-thiophenedicarboxylic acid (TDC) linker into the MOF-303 structure, partially replacing the 3,5-pyrazoledicarboxylic acid (PDC) linker. The goal is to increase the aperture size of the microporous channels in the pristine MOF-303 membrane, thereby improving the mass flux. X-ray diffraction characterization, combined with Rietveld refinement, confirmed that the partial substitution of PDC with TDC resulted in an increased pore-limiting diameter (PLD) of MOF-303. For instance, the pristine MOF-303 exhibited a PLD of 5.78 Å, while MOF-303(70/30) with 70% TDC replacement displayed a PLD of 6.02 Å. To fabricate the mixed-linker MOF-303 membranes, we utilized a seeded growth method, which yielded membranes with dense layers, as confirmed by scanning electron microscopy and air permeation characterization. The prepared membranes were subjected to pervaporation tests to evaluate their performance in separating 90 wt.% ethanol at 60 °C. The pristine MOF-303 membrane exhibited notable separation capabilities, with an average flux of 0.071 kg·m −2 ·hr −1 and a water/ethanol separation factor of 5371. Surpassing the unmodified MOF-303, the mixed-linker MOF-303(50/50) membrane demonstrated improved mass flux and water/ethanol separation factor. Specifically, the MOF-303(50/50) membrane displayed an average flux of 0.092 kg·m −2 ·hr −1 and a water/ethanol separation factor of 8500. Importantly, the unmodified MOF-303 membrane exhibited instability during prolonged pervaporation

关键词： Metal-organic framework MOF MOF membrane Pervaporation Mixed-linker MOF

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