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Influence of Halloysite Nanotubes from different deposits on the degradation of organic molecules

Ceramics International 2025年

作者： Ferlito, Chiara Rizzo, Carla Merir, Roufaida Cavallaro, Giuseppe Lisuzzo, Lorenzo Piccionello, Antonio Palumbo Lazzara, Giuseppe Department of Physics and Chemistry - Emilio Segrè University of Palermo Viale Delle Scienze 17 Palermo90128 Italy Section of Chemistry University of Palermo Palermo90128 Italy Department of Process Engineering Faculty of Technology Setif 1 University Setif19000 Algeria

In this work, Halloysite Nanotubes (HNTs) sourced from different geological deposits (Dragon mine and Latah County in the United States, Matauri Bay in New Zealand and Guelma in Algeria) were studied for the catalytic and photocatalytic degradations of model organic molecules, which are L (+) ascorbic acid and ibuprofen, respectively, in order to assess their distinct impacts on reactions activity. The nanoclays were fully characterized by different techniques (TGA, XRF, XRD, FTIR, ζ-potential, DLS, TEM, etc.) which enlightened differences in the morphological, thermal, chemical properties. As a direct consequence, the degradation of ascorbic was enhanced due to the presence of zinc and manganese oxide in the samples, whereas the photochemical degradation of ibuprofen, which was studied by using a photoreactor, was slowed down or speeded up depending on the particular clay used. These findings are crucial for the plethora of different applications and demonstrates the significant impact HNTs can exert on catalysis. This investigation opens up new perspectives of research for accurately selecting halloysite over other nanoclays. © 2025 The Authors

关键词： Nanoclay

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Chemical Vapor Deposition of Silicon Carbide on Alumina Ultrafiltration Membranes for Filtration of Nanoemulsions

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SSRN 2023年

作者： Qin, Guangze Jan, Asif An, Qi Zhou, Hanxiao Rietveld, Luuk C. Heijman, Sebastiaan G.J. Section of Sanitary Engineering Department of Water Management Faculty of Civil Engineering and Geosciences Delft University of Technology Stevinweg 1 Delft2628 CN Netherlands Section of Complex Fluid Processing Department of Process & Energy Faculty of Mechanical Maritime and Materials Delft University of Technology Delft2628 CN Netherlands

Worldwide, a considerable amount of oily wastewater is generated, with oil droplets from 2 to 200 nm that are difficult to separate because of their size and colloidal stability. This study presents a novel approach for effectively separating nanoemulsions via SiC-coated Al2O3 membranes fabricated based on low pressure chemical vapor deposition (LPCVD). Silicon Carbide (SiC) was deposited at a relatively low temperature (at 860 oC) on 100 nm alumina (Al2O3) membranes using two precursors: SiH2Cl2 and C2H2. With the increase in deposition time, up to 25 min, the pore size decreased from 41.2 nm to 33.6 nm. The SiC-coated membranes showed superoleophobicity, improved hydrophilicity, and highly negatively charged surfaces. Nanoemulsion filtration experiments were carried out at a constant permeate flux (80 Lm-2h-1) for six cycles with varying deposition time, pH, salinity, and surfactant types. The fouling of the SiC-coated membrane was, compared to the Al2O3 membrane, effectively mitigated due to the enhanced electrostatic repulsion and hydrophilicity. However, at higher salinity, due to decreased electrostatic repulsion, both the fouling of the Al2O3 membrane and the SiC-Al2O3 membrane increased, although the SiC-coated membrane still performed better, compared to the pristine Al2O3 membrane, probably due to the higher hydrophilicity of the SiC layer. Surfactant adsorption mainly occurred when the surface charge of the nanoemulsion and the membranes were opposite. Therefore, The H0 membrane surface charge changed from positive to negative when soaking it in negatively charged nanoemulsions, whereas SiC-coated membranes remained negatively charged regardless of surfactant type. The membrane fouling was alleviated when the membrane and oil droplets had the same charge. © 2023, The Authors. All rights reserved.

关键词： Silicon carbide

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Gas-phase synthesis of Ti_(2)CCl_(2) enables an efficient catalyst for lithiumsulfur batteries

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The Innovation 2024年第1期5卷 33-40页

作者： Maoqiao Xiang Zihan Shen Jie Zheng Miao Song Qiya He Yafeng Yang Jiuyi Zhu Yuqi Geng Fen Yue Qinghua Dong Yu Ge Rui Wang Jiake Wei Weiliang Wang Haiming Huang Huigang Zhang Qingshan Zhu Chuanfang John Zhang State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of the Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China China Nuclear Power Engineering Co. Ltd.117 West Third Ring RoadNorth SectionBeijing 100840China College of Materials Science&Engineering Sichuan UniversityChengdu 610065China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China School of Physics Guangdong Province Key Laboratory of Display Material and TechnologyCenter for Neutron Science and TechnologySun Yat-sen UniversityGuangzhou 510275China Solid State Physics&Material Research Laboratory School of Physics and Materials ScienceGuangzhou UniversityGuangzhou 510006China

MXenes have aroused intensive enthusiasm because of their exotic properties and promising ***,to date,they are usually synthesized by etching *** synthetic technologies provides more opportunities for innovation and may extend unexplored ***,we report a bottom-up gas-phase synthesis of Cl-terminated MXene(Ti_(2)CCl_(2)).The gas-phase synthesis endows Ti_(2)CCl_(2) with unique surface chemistry,high phase purity,and excellent metallic conductivity,which can be used to accelerate polysulfide conversion kinetics and dramatically prolong the cyclability of Li-S ***-depth mechanistic analysis deciphers the origin of the formation of Ti_(2)CCl_(2) and offers a paradigm for tuning MXene chemical vapor *** brief,the gas-phase synthesis transforms the synthesis of MXenes and unlocks the hardly achieved potentials of MXenes.

关键词： synthesis phase lithium

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Impact of Wind on Tide-Induced Advective Salt Transport in A Well- Mixed Estuary

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China Ocean engineering 2021年第1期35卷 107-122页

作者： CHEN Wei-lun ZHU Yu-liang KONG Jun CHU Ao ZHANG Wei-sheng State Key Laboratory of Hydrology Water Resources and Hydraulic EngineeringHohai UniversityNanjing 210098China Key Laboratory of Coastal Disaster and Defence of Ministry of Education Hohai UniversityNanjing 210098China College of Harbour Coastal and Offshore EngineeringHohai UniversityNanjing 210098China Key Laboratory of the Pearl River Estuarine Dynamics and Associated Process Regulation Ministry of Water ResourcesGuangzhou 510610China Faculty of Civil Engineering and Geosciences Section of Hydraulic EngineeringDelft University of Technology2600 GA DelftThe Netherlands

The tide-induced net advective salt flux in well-mixed estuaries consists of five terms according to the method from *** term resulted from the vertical variation in salinity can be negligible in well-mixed estuaries with four tide-induced salt flux terms,known as F1−*** explore the effects of wind on these salt fluxes,the current-salinity analytical model combined with the perturbation analysis is extended by including *** expressions for the four salt fluxes are derived separately in the present *** the assumption that only the M_(2) tidal component is accounted for and the salt flux generated by diffusion is not studied,the tide-induced net advective salt flux Q_(sx) is in the seaward direction without the wind *** applying the Western Scheldt estuary case,the wind influence on the tidal advection salt flux(TASF)distribution in the F4 term was *** phase difference between zero-order velocity and first-order salinity(Δφ)at the surface layer of the estuary is larger than 90°and smaller than 90°at the bottom layer,which leads to landward TASF in the surface layer and seaward TASF in the bottom *** distribution ofΔφis not uniform in the horizontal direction with wind included,which differs from the result without *** the case of seaward wind with the speed of 18 m/s,the decrease in the zeroth-order velocity phase(φu)at the surface layer is larger than that of the first-order salinity phase(φs)downstream,which leads to an abnormal seaward TASF in this *** to the surface stress caused by wind,the Stokes compensation flow in the middle and lower reaches increases/decreases with the increase of the landward/seaward wind,while the upstream situation is ***,the first-order velocity in the middle and lower reaches increases/decreases with the increase of the landward/seaward wind,while the upstream situation is also *** first-order salinity also increases/decreases with the increase of la

关键词： tide-induced net advective salt flux analytical expression wind effect well-mixed estuary Western Scheldt Estuary

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Mechanistic Modeling of the Elution Behavior and Convective Entrapment of Vesicular Stomatitis Virus (Vsv) on an Ion Exchange (Iex) Chromatography Monolith

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SSRN 2025年

作者： Schimek, Adrian Ng, Judy K.M. Rischawy, Federico Will Hubbuch, Jürgen ViraTherapeutics GmbH Bundesstraße 27 Rum6063 Austria Boehringer Ingelheim Pharma GmbH & Co.KG Birkendorfer Str. 65 Biberach88397 Germany Karlsruhe Institute of Technology Institute of Process Engineering in Life Sciences Section IV Biomolecular Separation Engineering Fritz-Haber-Weg 2 Karlsruhe76131 Germany

Developing a downstream purification process for replication-competent enveloped virus particles presents a significant challenge. This is largely due to the highly complex particle structures, as well as complexities of emerging purification modalities for such virus particles. In this study, an unexpected fluid-dynamic effect was observed during the elution of enveloped virus particles from an ion exchange chromatography monolith. This effect led to peak tailing and the separation of virus particle subpopulations. Upon considering possible causes, convective entrapment was identified as a plausible explanation. To investigate this effect, a mechanistic modeling approach representing the electrostatic resin interactions and the convective entrapment effect was implemented. The introduced Langmuir approximation of the convective entrapment showed good alignment with reference data. The model could not only reproduce the retention effect, but also suggested two virus particle populations due to the stronger retention effect on the tailing subpopulation caused by convective entrapment. © 2025, The Authors. All rights reserved.

关键词： Ion chromatography

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Bio-based material formulation for extrusion printing by dityrosine crosslinking of unmodified casein

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Bioprinting 2022年 28卷

作者： Haas, Sandra Götz, Friederike Hubbuch, Jürgen Institute of Process Engineering in Life Sciences Section IV: Molecular Separation Engineering Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 2 Karlsruhe 76131 Germany

In the development of new functional bio-based materials in the field of three-dimensional (3D) printing, visible light-induced dityrosine crosslinking gains increasing interest. In this context, most current bio-based materials and ink formulations rely on previously modified chemical substances with increased tyrosine availability. In contrast, we developed and characterized a photopolymerizable ink formulation for extrusion printing based on the unmodified and naturally occurring protein casein. Manufacturability of formulations containing protein, photoinitiating system, buffer and a thickening agent turned out to be a key factor for the ink development. In total, eight different thickening agents were assessed regarding their suitability to increase the viscosity of the ink formulation to expand the fabrication window for extrusion-based 3D printing. The mechanical properties of the ink formulation and hydrogel in presence of sodium alginate were further characterized and the macroscopic fabrication of auxetic structures consisting of up to 30 layers was achieved by applying extrusion-based printing. © 2022 Elsevier B.V.

关键词： Alginate Bio-based material printing Casein Protein-based hydrogel Visible light-induced photopolymerization

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Preparation of polyaniline iron oxide composite (PANI/Fe 3 O 4 ) for enhanced Congo red removal performance

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Materials Today: Proceedings 2021年 46卷 1875-1881页

作者： X.P. Teng M.Y.K. Bryan P.V. Chai J.Y. Law Department of Chemical & Petroleum Engineering Faculty of Engineering Technology & Built Environment UCSI University Cheras Kuala Lumpur 56000 Malaysia Process Engineering Technology Section Universiti Kuala Lumpur Malaysian Institute of Chemical and Bioengineering Technology 78000 Alor Gajah Melaka Malaysia

Composite has emerged as one of the capable materials for wastewater treatment process. Out of many different types of composite, polyaniline/iron oxide (PANI/Fe 3 O 4 ) composite has proven its worth in tackling water pollution attributed to its high surface area and the ability to tune the surface charge of the composite to enhance adsorption performance. In order to produce a high-performance composite, the ratio of PANI/Fe 3 O 4 composite and the operating condition during the removal process should be addressed. Realizing this importance, the present work seeks to alter different PANI concentration on the surface of Fe 3 O 4 nanoparticles to promote Congo red (CR) removal performance and investigate the best operating condition for the adsorbent. First, PANI was synthesized through chemical polymerization method in the presence of ammonium persulfate as oxidizing agents and aniline monomers in acidic medium at low temperature. Then, PANI/Fe 3 O 4 composites were synthesized by physically mixing it with Fe 3 O 4 in acetone medium. Next, characterization of adsorbents was evaluated through Fourier-transform infrared spectroscopy (FTIR). Subsequently, the performance of PANI/Fe 3 O 4 composites at 0/100, 30/70, 50/50, 70/30 and 100/0 ratio were examined, and the results showed that, PANI/Fe 3 O 4 composite at 70/30 ratio achieved the highest CR removal at 89.62% as compared to other PANI/Fe 3 O 4 composite ratio. Besides that, PANI/Fe 3 O 4 composite at 70/30 ratio recorded 6.31% and 2.04% dye removal enhancement as compared to Fe 3 O 4 and PANI adsorbent respectively. Afterward, PANI/Fe 3 O 4 composite performance was evaluated by varying the temperature (25–45 °C), adsorbent dosage (0.01–0.1 g) and dye concentration (20–50 ppm) and results showed that, operating condition at 45 °C, 0.1 g and 20 ppm provide the highest CR removal. The experiment was proceeded with regeneration studies to measure the reusability of the PANI/Fe 3 O 4 composite. The regenerated comp

关键词： Iron Oxide (Fe 3 O 4 ) Polyaniline (PANI) Polyaniline/Iron Oxide Composite (PANI/Fe 3 O 4 ) Congo Red (CR) Regeneration

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A comprehensive evaluation of machine learning and deep learning algorithms for wind speed and power prediction

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Decision Analytics Journal 2024年 13卷

作者： Elmousalami, Haytham Elmesalami, Hadi Hesham Maxi, Mina Farid, Ahmed Abdel Kader Mohamed Elshaboury, Nehal Department of Infrastructure Engineering Faculty of Engineering and Information Technology The University of Melbourne Vic 3010 Australia Projects Section Head and PMP at General Petroleum Company (GPC) Egypt Planning Engineer at Riyadh Factory Aluminum System Riyadh Saudi Arabia Civil engineering department at the British university in Egypt Cairo Egypt Civil Engineering Department Faculty of engineering Benha university Benha 13518 Egypt Construction and Project Management Research Institute Housing and Building National Research Centre Giza Egypt Industrial Ecology Energy and Process Engineering Norwegian University of Science and Technology (NTNU) Norway

Accurate wind speed and power predictions are crucial for renewable wind energy applications. This study compares and evaluates twelve machine learning (ML) and deep learning (DL) algorithms, including single and ensemble models across various time scales from 10 min to a day and a half ahead with a particular focus on ensemble prediction algorithms. Moreover, the study proposes a wind speed and power prediction system where the outcome of the wind speed prediction (WSP) model serves as input for the wind power prediction (WPP) model. Several evaluation metrics, such as mean absolute percentage error (MAPE) and mean square error (MSE) were calculated to benchmark different model accuracies. For WSP, the extremely randomized trees, decision tree, and bagging ensemble algorithms demonstrated high accuracy across different time scales where the MAPE ranged from 3.4% to 9.2%, the MSE ranged from 0.17 to 1.15, and the adjusted coefficient of determination ranged from 94% to 99%. For WPP, bagging ensemble algorithms and extremely randomized trees were also effective for predicting different time scales where the MAPE ranged from 4.12% to 11.7% and the MSE ranged from 10945 to 2.4. Ensemble ML algorithms provide better and more accurate results than single ML algorithms. The extreme gradient boosting model showed relatively small computational time and memory according to computational cost. Moreover, this study conducted a sensitivity analysis where air pressure, wind vane, and humidity were the key predictors for WSP and WPP. © 2024 The Author(s)

关键词： Artificial intelligence Decision analytics Deep learning Ensemble machine learning Sustainability Wind speed and power prediction

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Preparation of polyaniline iron oxide composite (PANI/Fe3O4) for enhanced Congo red removal performance

Preparation of polyaniline iron oxide composite (PANI/Fe3O4)...

引用

2020 Regional Congress on Membrane technology, RCOM 2020 and Regional Conference Environmental engineering, RCEnvE 2020

作者： Teng, X.P. Bryan, M.Y.K. Chai, P.V. Law, J.Y. Department of Chemical and Petroleum Engineering Faculty of Engineering Technology and Built Environment UCSI University Cheras Kuala Lumpur56000 Malaysia Process Engineering Technology Section Universiti Kuala Lumpur Malaysian Institute of Chemical and Bioengineering Technology Melaka Alor Gajah78000 Malaysia

Composite has emerged as one of the capable materials for wastewater treatment process. Out of many different types of composite, polyaniline/iron oxide (PANI/Fe3O4) composite has proven its worth in tackling water pollution attributed to its high surface area and the ability to tune the surface charge of the composite to enhance adsorption performance. In order to produce a high-performance composite, the ratio of PANI/Fe3O4composite and the operating condition during the removal process should be addressed. Realizing this importance, the present work seeks to alter different PANI concentration on the surface of Fe3O4nanoparticles to promote Congo red (CR) removal performance and investigate the best operating condition for the adsorbent. First, PANI was synthesized through chemical polymerization method in the presence of ammonium persulfate as oxidizing agents and aniline monomers in acidic medium at low temperature. Then, PANI/Fe3O4composites were synthesized by physically mixing it with Fe3O4in acetone medium. Next, characterization of adsorbents was evaluated through Fourier-transform infrared spectroscopy (FTIR). Subsequently, the performance of PANI/Fe3O4composites at 0/100, 30/70, 50/50, 70/30 and 100/0 ratio were examined, and the results showed that, PANI/Fe3O4composite at 70/30 ratio achieved the highest CR removal at 89.62% as compared to other PANI/Fe3O4composite ratio. Besides that, PANI/Fe3O4composite at 70/30 ratio recorded 6.31% and 2.04% dye removal enhancement as compared to Fe3O4and PANI adsorbent respectively. Afterward, PANI/Fe3O4composite performance was evaluated by varying the temperature (25-45 °C), adsorbent dosage (0.01-0.1 g) and dye concentration (20-50 ppm) and results showed that, operating condition at 45 °C, 0.1 g and 20 ppm provide the highest CR removal. The experiment was proceeded with regeneration studies to measure the reusability of the PANI/Fe3O4composite. The regenerated composite managed to retain at high dye removal effi

关键词： Magnetite

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Enhancing biodegradation of polyolefins and real mixed plastic waste by combination of pretreatment and mixed microbial consortia

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Chemosphere 2025年 373卷 144151页

作者： Lomwongsopon, Passanun Martínez, Belén Monje Jiménez, Alberto Barranca Bardenstein, Alexander Leo Kusano, Yukihiro de Claville Christiansen, Jesper Varrone, Cristiano Section of Bioresources and Process Engineering Department of Chemistry and Bioscience Aalborg University Fredrik Bajers Vej 7H Aalborg9220 Denmark AIMPLAS Instituto Technológico del Plástico València Parc Tecnològic C/Gustave Eiffel 4 Valencia Paterna46980 Spain Plastics and Packaging Technology Danish Technological Institute Taastrup2630 Denmark Department of Materials and Production Aalborg University Fibigerstræde 16 Aalborg9220 Denmark

Polyolefins (PO)1 are the most common consumer plastics, constituting about half of plastic waste. This work investigated the process combining physicochemical pretreatment and PO-enriched mixed microbial consortia (MMCs) on biodegrading European real mixed plastic waste. The MMCs, acclimatized on PO powders, were enriched with strains that could use PO, primarily dominated by the genus Rhodanobacter. Several pretreatment methods were investigated on pure polyethylene (PE) and polypropylene (PP). UVC combined with Fenton's reagent was found to be the best pretreatment process for pure PO, increasing the total oxidative indices of PE and PP by 135 and 21 times, respectively, and decrease the total crystallinity of PP by 2.3 times (but not PE), compared to the untreated ones. Maximum 7.7% and 16.3% weight reductions were achieved after MMCs biodegradation of UVC-Fenton-treated PE and PP powders (80 μm), with a 4.3- and 27.2-times improvement from the untreated ones. Selected pretreatments and MMCs were then applied to real mixed plastic waste and post-consumer multilayers from 10 different streams. The highest weight reductions after 30-days biodegradation were obtained using mixed plastic reject from a biogas plant (MW2) followed by the unrecyclable mixed plastic waste from a Danish municipality (MW1), with a reduction of 36.8% and 30.0% using radio frequency (RF) oxygen plasma pretreatment, respectively. Integration of ultrasonic irradiation with atmospheric pressure plasma treatment increased the biodegradation of MW1 to 39.4%. This study addressed the bottleneck of slow biodegradation of recalcitrant plastics, laying down the basis for future development of biotechnological recycling of unrecyclable plastic fractions. © 2025 The Author(s)

关键词： Plasma applications

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