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Modeling the adsorption of ciprofloxacin on magnetic biochar: A comparative study of traditional and advanced approaches

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Journal of Water Process engineering 2025年 74卷

作者： Fuhr, Ana Carolina Ferreira Piazzi Rodrigues, Daniel Lucas Costa Guido, Júlia Amaral de Azevedo, Cristiane Ferraz de Souza, Nicholas Fernandes Dotto, Guilherme Luiz Lima, Eder Claudio Machado Machado, Fernando Technology Development Center Federal University of Pelotas (UFPel) 1 Gomes Carneiro St RS Pelotas 96010-610 Brazil Materials Science and Engineering Graduate Program Federal University of Pelotas (UFPel) 1 Gomes Carneiro St. RS Pelotas 96010-610 Brazil Center of Engineering Federal University of Pelotas 989 Benjamin Constant St. RS Pelotas 96010-020 Brazil Environmental Science Graduate Program Federal University of Pelotas (UFPel) 989 Benjamin Constant St. RS Pelotas 96010-020 Brazil Chemical Engineering Department Federal University of Santa Maria (UFSM) 1000 Roraima Av. RS Santa Maria 97105-900 Brazil Institute of Chemistry Federal University of Rio Grande do Sul (UFRGS) 9500 Bento Gonçalves Av. Postal Box 15003 RS Porto Alegre 91501-970 Brazil

This study prepared magnetic-activated biochar (MAB) through microwave pyrolysis and chemical activation of olive agro-industrial biomass. The adsorbent was characterized by SEM-EDS, FTIR, XRD, N₂ adsorption/desorption, VSM, IEP, and pH point of zero charge techniques, indicating different structural properties. The adsorption capacity for ciprofloxacin (CIP) removal was evaluated through batch tests, assessing kinetics and equilibrium. The adsorption kinetics followed the general order model. The process was fast, with MAB achieving a half-adsorption time of up to 3 min. In contrast, the Liu model showed a maximum capacity of 215 mg g⁻¹ at 328 K. Statistical models indicated multilayer adsorption, with layer numbers varying from 3.4 to 2.1. The temperature significantly affects steric parameters, increasing the number of CIP molecules adsorbed per site while reducing the number of layers formed. Thermodynamic analysis suggested physical interactions, including hydrogen bonding and π-π interactions, as the primary removal mechanisms. A simulated effluent test demonstrated a 98.98 % removal efficiency, confirming MAB's effectiveness in removing emerging pollutants like CIP and its potential for wastewater treatment applications. MAB can be easily recovered from aqueous media using magnetic fields. Additionally, its adsorption capacity can be regenerated using green solvent elution. These characteristics highlight its potential for wastewater treatment of contaminants of emerging concern. © 2025 Elsevier Ltd

关键词： Adsorption Biomass Contaminants of emerging concern Physical interactions Statistical physics

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Rheological and stability analysis of cement pastes incorporating silica-based wastes

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Particuology 2024年第6期89卷 144-152页

作者： Julia da Rosa Martins Janaíde Cavalcante Rocha Dachamir Hotza Luciano Senff Graduate Program in Materials Science and Engineering(PPGMAT) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Graduate Program in Civil Engineering(PPGEC) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Graduate Program in Chemical Engineering(POSENQ) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Department of Mobility Engineering Federal University of Santa Catarina(UFSC)Joinville89219-600SCBrazil

This study investigates the influence of waste characteristics,especially zeta potential,on the properties of cement pastes and *** focus is to evaluate the impact of the zeta potential of cement particles and waste materials on the sedimentation speed,rheology,and hardening time of stabilized cement *** Cement II F 40,retarder additive,silica,and fly ash were used in the *** pastes were prepared,and during the stabilization period,their rheological properties and pH were *** zeta potential and sedimentation speed of the cement and waste particles were measured at the pH that the pastes presented during the entire stabilization *** the stabilization period,the pastes were subjected to the hardening time *** zeta potential analyses revealed diverse values for the different powder types,with the cement particles exhibiting a zeta potential of−3.0 mV,the silica particles exhibiting−10.5 mV,and the fly ash particles exhibiting−20.3 *** influence of the high zeta potential modulus was observed on the sedimentation speed,with the solution containing fly ash exhibiting a speed of 40.01μm/s,whereas the solution containing only cement exhibited a speed of 99.38μm/*** the pastes,the results indicate that the presence of fly ash particles with a significantly negative zeta potential led to a 16%reduction in hardening time compared to particles with a lower modulus of zeta *** tests showed that the inclusion of fly ash particles prevented the formation of *** the zeta potential influenced agglomerate formation and hardening time,it was found to have no effect on yield stress or viscosity.

关键词： Wastes Zeta potential Setting time Rheometry

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PVA-based bioinks for 3D bioprinting: A comprehensive review of their applications in tissue engineering

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Bioprinting 2025年 49卷

作者： Narges Johari Zary Adabavazeh Francesco Baino Materials Engineering Group Golpayegan College of Engineering Isfahan University of Technology Golpayegan Iran Ph.D. Program Graduate Institute of Precision Manufacturing National Chin-Yi University of Technology Taichung Taiwan ROC Institute of Materials Physics and Engineering Department of Applied Science and Technology Politecnico di Torino Torino Italy

3D bioprinting is an innovative approach that overcomes the limitations of traditional methods for creating cell-laden biomaterials and constructs. It allows for the fabrication of complex and biologically active tissue structures. This review aims to provide a comprehensive evaluation of polyvinyl alcohol (PVA)-based bioinks within a 3D bioprinting framework. PVA-based bioinks exhibit remarkable properties, such as biocompatibility, biodegradability, and the ability to enhance cell growth and differentiation. These properties make them appropriate for many tissue engineering applications. The study evaluates the physicochemical and biological properties of PVA bioinks, including how they combine with other materials such as gelatin, chitin, chitosan, alginate, agarose, cellulose, κ-carrageenan, methacrylate, nanoparticles, mineral additives, carbon nanotubes, graphene oxide, and extracellular matrix components. Furthermore, this review evaluates the benefits of market availability and enhanced printing resolution, in addition to the challenges posed by complexity, dependency on support baths, and the risk of contamination. The objective of this review is to draw attention to the capabilities of PVA-based bioinks and provide guidelines for future research to improve the effectiveness of these materials in tissue engineering and regenerative medicine.

关键词： Bioprinting Bioink Polyvinyl alcohol PVA-based bioinks

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Mxenes as a versatile nanoplatform: Synthesis and emerging biomedical applications

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Journal of Industrial and engineering Chemistry 2025年

作者： Amani, Ali Mohammad Vafa, Ehsan Mirzae, Maryam Abbasi, Milad Vaez, Ahmad Najdian, Atena Jahanbin, Alireza Kasaei, Seyed Reza Mosleh-Shirazi, Sareh Kamyab, Hesam Chelliapan, Shreeshivadasan Rajendran, Saravanan Guamán, Linda P. Department of Medical Nanotechnology School of Advanced Medical Sciences and Technologies Shiraz University of Medical Sciences Shiraz Iran Critical Care Nursing Nursing and Midwifery School Islamic Azad University Kazerun Branch Kazerun Iran Department of Tissue Engineering and Applied Cell Sciences School of Advanced Medical Sciences and Technologies Shiraz University of Medical Sciences Shiraz Iran The Persian Gulf Nuclear Medicine Research Center Bushehr Medical University Hospital School of Medicine Bushehr University of Medical Sciences Bushehr Iran Department of Materials Science and Engineering School of Engineering Shiraz University Zand Blvd. Shiraz*** Iran Shiraz Endocrinology and Metabolism Research Center Shiraz University of Medical Sciences Shiraz Iran Department of Materials Science and Engineering Shiraz University of Technology Shiraz Iran Department of Biomaterials Saveetha Dental College and Hospital Saveetha Institute of Medical and Technical Sciences Chennai600 077 India The KU-KIST Graduate School of Energy and Environment Korea University 145 Anam-ro Seongbuk-Gu Seoul02841 Korea Republic of Universidad UTE Quito170527 Ecuador Department of Smart Engineering and Advanced Technology Faculty of Artificial Intelligence Universiti Teknologi Malaysia Jalan Sultan Yahya Petra Kuala Lumpur54100 Malaysia Instituto de Alta Investigacion Universidad de Tarapacá Arica1000000 Chile Quito170527 Ecuador

Recently, MXenes have garnered significant attention in academic research due to their remarkable structural, electrical, magnetic, optical, mechanical, and chemical properties. New advancements and emerging findings indicate that MXene, classified as a two-dimensional (2D) layered material, exhibits significantly more potential in the field of biomedicine and biotechnology compared to existing nanosystems. These applications include acting as antibacterial agents, biosensor systems, the delivery and loading of drugs, bioimaging, and therapeutic interventions. The unique characteristics of MXenes, such as their significant electrical conductivity, large surface area, low toxicity, magnetism, luminescence, and high biocompatibility, make them highly promising candidates for diagnostic, therapeutic, and theranostic applications. Surface modifications of MXenes exhibit biocompatibility and have multifunctional functions, including the ability to direct ligands towards specific spots for preferential aggregation, hence enabling their utilization in specialized applications. This paper provides an overview of the characteristics, modifications, and synthesis methods of MXene nanomaterials. The present article also delivers a comprehensive assessment of the practical uses of MXene-based nanomaterials in biomedicine, with a particular focus on biosensing, bioimaging, antibacterial effects, implants, and multifunctional therapeutic platforms. This paper also presents a discussion of the future prospects and challenges associated with the applications of MXenes in the biomedicine field. © 2025 The Korean Society of Industrial and engineering Chemistry

关键词： Biocompatibility

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Recent advances in electronic devices for monitoring and modulation of brain

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Nano Research 2021年第9期14卷 3070-3095页

作者： Yong Won Kwon Yoon Sun Jun Young-Geun Park Jiuk Jang Jang-Ung Park Nano Science Technology Institute Department of Materials Science and EngineeringYonsei UniversitySeoul 03722Republic of Korea Center for Nanomedicine Institute for Basic Science(IBS)Seoul 03722Republic of Korea Graduate Program of Nano Biomedical Engineering(NanoBME) Advanced Science InstituteYonsei UniversitySeoul 03722Republic of Korea

The brain is actuated by billions of neurons with trillions of interconnections that regulate human *** the mechanisms of these systems that induce sensory reactions and respond to disease remains one of the greatest challenges in science,engineering,and *** advances in nanomaterials and nanotechnologies have led to the extensive research of electronic devices for brain interfaces to better understand the neural activities of the brains complex nervous *** development of sensor devices for monitoring the physiological signals of the brain related to traumatic injury status has accompanied by the progress of electronic neural probes in *** addition,these neurological and stereotactic surgical revolutions hold immense potential for clinical analysis of pharmacological systems within cerebral ***,we review the progress of electronic devices interfacing with brain in terms of the materials,fabrication technologies,and device *** activity can be measured and modulated by brain probes based on newly developed nanofabrication ***,in vivo pathological monitoring of the brain and pharmacological assessment has been developed in miniaturized and wireless *** also consider the key challenges and prospects for further development,and explore the future directions emerging in the latest research.

关键词： neural interfaces neural recording neuromodulation intracranial pressure monitoring microfluidic drug delivery

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Control of cell behavior on the polymer functionalized biointerface

Control of cell behavior on the polymer functionalized bioin...

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54th SPSJ Symposium on Macromolecules

作者： Otsuka, Hidenori Satomi, Tomomi Ueno, Koji Taniguchi, Akiyoshi Kobayashi, Hisatoshi Tanaka, Junzo Nagasaki, Yukio Kataoka, Kazunori Fujita, Yohei Biomaterials Center National Institute for Materials Science Graduate School of Pure and Applied Science University of Tsukuba Graduate School of Engineering University of Tokyo Department of Applied Chemistry Tokyo University of Science

Micropatterned PEGylated substrates with two-dimensional arrays of plasma-etched circular domains were prepared by coating of poly(ethylene glycol) (PEG) based polymer on the substrate, followed by plasma-etching through a metal mask pattern with circular holes. The PEGylated region on the patterned substrate works to repel proteins, consequently, inhibits cell adhesion. Then the micro-patterning of bovine articular chondrocytes or rat primary hepatocytes hetero-spheroids underlaid with endothelial cells was achieved on the plasma-etched circular domains, exposing the base substrate surface. PEG-g-pyridine copolymer was then synthesized for long-term cell culture, which is expected to have long stability, to overcome deterioration of polymer modified surface at room temperature and atmospheric conditions when single-point adsorption was employed.

关键词： Cells

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Carbon Nanotube Coating on Titanium Substrate Modified with TiO_2 Nanotubes

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Journal of Wuhan University of Technology(materials science) 2011年第5期26卷 867-871页

作者：白玉 PARK Ilsong BAE Taesung KIM Kyounga WATARI Fumio UO Motohiro LEE Minho Department of Dental Biomaterials School of Dentistry and Institute of Oral BioscienceBrain Korea 21 ProjectChonbuk National University School of Materials Science and Engineering Inner Mongolia University of Technology Department of Conservative Dentistry Institute of Oral Bioscience and BK 21 ProjectSchool of DentistryChonbuk National University Biomedical Dental Materials and EngineeringDepartment of Oral Health ScienceGraduate School of Dental MedicineHokkaido University Advanced Biomaterials Section Graduate School of Medical and Dental SciencesTokyo Medical and Dental University

A combination of carbon nanotubes （CNTs） and titanium （Ti） modified with TiO2 nanotubes （TiO2 NTs） was fulfilled with the aim of improving bioactivity of Ti ***,well-ordered TiO2 NTs were prepared by the electrochemical anodization of Ti in an ethylene glycol electrolyte containing 1 wt% NH4F and 10 wt% H2O at 20 V for 50 min,followed by ***,the carboxylated CNTs were coated onto the TiO2 NTs using electrophoretic deposition （EPD） *** growth of hydroxyapatite （HA） on the samples was investigated by soaking them in simulated body fluid （SBF）.The result showed the CNTs-coated Ti with the modification of TiO2 NTs （CNTs-TiO2 NTs） was more efficient to induce HA formation than the CNTs-coated smooth Ti （CNTs-Ti）.The vitro cell response was evaluated using osteoblast cells （MC3T3-E1）.The good cell proliferation and strong cell adhesion could be obtained on the CNTs-TiO2 *** results indicated that CNT coating on the Ti modified with TiO2 NTs could be potentially useful for the periodontal ligament combination on dental implants.

关键词： carbon nanotubes TiO2 nanotubes apatite-forming ability cell adhesion

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Accessing the viscera: Technologies for interoception research

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Current Opinion in Neurobiology 2025年 93卷 103050-103050页

作者： Pang, Karen K.L. Mondal, Rajib Sahasrabudhe, Atharva Anikeeva, Polina Department of Brain and Cognitive Sciences Massachusetts Institute of Technology United States K. Lisa Yang Brain-Body Center Massachusetts Institute of Technology United States McGovern Institute for Brain Research Massachusetts Institute of Technology United States Research Laboratory of Electronics Massachusetts Institute of Technology United States MIT-Harvard Graduate Program in Health Sciences and Technology United States Department of Materials Science and Engineering Massachusetts Institute of Technology United States

Interoception, or the perception and regulation of body signals by the central nervous system, is critical for maintaining homeostasis and coordination of behaviors. Deciphering the mechanisms of interoception requires identifying pathways and decoding of diverse signals across the brain-body axis. These studies are enabled by tools to modulate and record physiological processes in the brain and visceral organs. While numerous advanced neurotechnologies are well-established in the brain, these techniques often offer limited utility for other organs, such as the gastrointestinal tract, heart, liver, or bladder. In this review, we highlight recent advances in technologies for recording and modulation of visceral organ physiology in small animals in vivo, with a focus on implantable bioelectronic organ interfaces that can be deployed in behaving animals. We discuss how such interfaces are made possible through innovations in materials and electronics and outline unmet technological challenges in interoception research. © 2025 Elsevier Ltd

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Static and dynamic mechanical properties of extracellular matrix synthesized by cultured chondrocytes

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materials science and engineering C 2004年第3期24卷 425-429页

作者： Miyata, Shogo Furukawa, Katsuko S. Ushida, Takashi Nitta, Yasuo Tateishi, Tetsuya Biomedical Engineering Laboratory Dept. of Mechanical Enginieering Graduate School of Engineering Hongo 7-3-1 Bunkyo Tokyo 113-8656 Japan Biomaterials Center Natl. Inst. for Materials Science Japan

Recently, an approach to restore cartilage defects, culturing autologous chondrocytes in vitro to create a three-dimensional tissue and then implanting the cultured tissue, has been developed. In this kind of approach, it is important to study whether the extracellular matrixes synthesized by cultured chondrocytes have appropriate mechanical property. In this study, we attempted to evaluate in detail mechanical properties of the extracellular matrix synthesized by chondrocytes in vitro. Therefore, we cultured bovine chondrocytes in agarose gel and assessed the changes in not only static but also dynamic mechanical properties during long-term culture. In addition, to assess the mechanical property of the extracellular matrix synthesized by chondrocytes only, we calculated the volume ratio of the extracellular matrix in agarose gel from the cross section and estimated the static Young's modulus of the extracellular matrix synthesized by cultured chondrocytes based on the Rule of Mixture. As a result, both the equilibrium aggregate modulus and dynamic Young's modulus of chondrocyte/agarose disks increased with time. The value of calculated modulus was larger than that of the pericellular matrix of cartilage explant. In conclusion, the biomechanical property of chondrocyte/agarose constructs and the matrix synthesized by chondrocytes were assessed in detail. © 2004 Elsevier B.V. All rights reserved.

关键词： Cartilage

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Alumina sol bonded castables for blast furnace main troughs. Part 1 - dispersants, gelling agents and secondary binders.

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Ceramics International 2025年

作者： L.B. Nascimento V.G. Domiciano V.C. Pandolfelli RHI Magnesita GmbH Technology Center Leoben Austria Federal University of São Carlos Graduate Program in Materials Science and Engineering São Carlos Brazil RHI Magnesita Research and Development Center Contagem Brazil

Calcium aluminate cement (CAC) is broadly used in refractory compositions due to its advantages, although CaO can affect the castable’s hot properties when silica is present. The need for higher-temperature applications and tougher conditions has led to innovations in high-performance materials, focusing on reducing CAC content and using binders without CaO or SiO 2 . Although progress has been made in their application, these binders still have limitations. Colloidal alumina is particularly promising for generating a silica-free system with higher refractoriness and lower liquid phase formation, depending on the refractory composition. Based on these aspects, this work evaluated the influence of using colloidal alumina as a binder in refractory castables (Al 2 O 3 -SiC-C) for blast furnace main troughs, comparing its properties to a commercially available silica sol castable. The influence of different dispersants, gelling agents and secondary binders on the properties of both sol-bonded castables was investigated. The results indicated that citric acid was the most effective dispersant in providing suitable rheological behavior based on its interaction with alumina particles (electrostatic mechanism), magnesia sinter and calcium aluminate cement. Furthermore, using optimized amounts of citric acid, MgO and CAC, a colloidal alumina-bonded refractory composition with higher green mechanical strength and suitable working time was obtained compared to the colloidal silica castable used as reference.

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