Article
Engineering, Chemical
Lu Liu, Dongxia Liu, Chen Zhang
Summary: This study demonstrates that polyimide-derived asymmetric carbon molecular sieve (CMS) hollow fiber membranes exhibit outstanding H-2/C3H8 separation performance at high temperatures, making them potentially attractive for catalytic propane dehydrogenation membrane reactors. By controlling the mixture of hydrogen and propane, stable performance of CMS membranes under high-temperature conditions can be achieved.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Yuhe Cao, Kuang Zhang, Chen Zhang, William J. Koros
Summary: This study presents an economically viable method to fabricate composite nanoparticle-containing carbon molecular sieve hollow fiber membranes with excellent gas separation performance through a coating process.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Can Zeng Liang, Wai Fen Yong, Ji Wu, Martin Weber, Christian Maletzko, Juin-Yih Lai, Tai-Shung Chung
Summary: In this study, a newly designed polymer, PTPES, was reported to significantly increase propylene permeance and propylene/propane selectivity through the plasticization effect. This was attributed to the plasticization-enlarged molecular sieving effect caused by the trimethylbenzene moieties in the polymer chains. This research provides new insights into the gas transport mechanisms of membrane materials and may inspire the development of new-generation polymeric materials and membranes for propylene/propane and other gas separations.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Jong Geun Seong, Jeremy C. Lewis, John A. Matteson, Erica Craddock, Ulises Martinez, Harshul Thakkar, Angelica D. Benavidez, Kathryn A. Berchtold, Rajinder P. Singh
Summary: Polymer membrane carbonization is a promising strategy for obtaining carbon molecular sieve (CMS) membrane materials with tailorable cavity size distributions. In this study, highly O-2 permselective CMS hollow fiber membranes (HFMs) derived from rigid PBI materials were fabricated and evaluated for O-2/N-2 separation performance.
Article
Engineering, Chemical
Mingming Wang, Zhigang Wang, Xiaoyao Tan, Shaomin Liu
Summary: Highly-asymmetric metallic Ni hollow fiber membranes were fabricated using a modified phase inversion and sintering technique. By adjusting spinning conditions and sintering parameters, a hollow fiber with optimized microstructure and significantly increased hydrogen flux was achieved, demonstrating great potential for application in gas separation processes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Peng Du, Jieyu Song, Xuerui Wang, Yuting Zhang, Jixian Xie, Gang Liu, Yongli Liu, Zhenwei Wang, Zhou Hong, Xuehong Gu
Summary: Efficient hydrogen separation is crucial from the cracked tail gas of ethylene plant. DD3R zeolite membranes were developed for this purpose, showing high selectivity and stability under harsh conditions. The efficient scale-up synthesis method led to the production of high-quality membranes suitable for industrial applications.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Jian Song, Zhigang Wang, Xiaoyao Tan, Yifan Cui, Sibudjing Kawi, Shaomin Liu
Summary: A BCFS perovskite hollow fiber membrane was prepared by phase inversion and sintering technique with the addition of Co2O3 to enhance mechanical strength and reduce sintering temperature. The membrane exhibits simultaneous permeation of hydrogen and oxygen, showing potential as a catalytic membrane reactor for various reactions. Simultaneous permeation enhances hydrogen and oxygen fluxes by reducing gas concentrations and promoting gas/ion exchange reactions.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Wulin Qiu, Liren Xu, Zhongyun Liu, Yang Liu, Pezhman Arab, Mark Brayden, Marcos Martinez, Junqiang Liu, Abhishek Roy, William J. Koros
Summary: The study demonstrates successful recovery of aged carbon molecular sieve (CMS) fibers through super-hyperaging technique, achieving satisfactory propylene permeance with optimal selectivity. A super-hyperaging temperature of around 280 degrees Celsius is shown to provide the best balance between permeance and selectivity. The regenerated CMS membrane surpasses the polymer permeance-selectivity tradeoff upper bound, with a hypothetical mechanism for the super-hyperaging recovery of aged CMS fibers discussed.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Sen Xiong, Xiaojuan Jia, Kai Mi, Yong Wang
Summary: The use of ALD to coat ultra-thin layers of alumina on PTFE HFMs in water treatment significantly enhances permselectivity and fouling resistance. The CFD-optimized ALD process is expected to be a universal strategy for efficiently enhancing the performance of polymeric membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Linfeng Lei, Arne Lindbrathen, Magne Hillestad, Xuezhong He
Summary: Asymmetric carbon molecular sieve (CMS) membranes prepared from cellulose hollow fiber precursors show excellent separation performance and high stability for H2/CO2 separation. A two-stage carbon membrane system is found to be technologically and economically feasible for producing high-purity H2. It is suggested that higher operating temperatures are needed to achieve higher purity hydrogen.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Stephan Emonds, Johannes Kamp, Robin Viermann, Anna Kalde, Hannah Roth, Matthias Wessling
Summary: Polyelectrolyte composite hollow fiber membranes have great potential in industrial nanofiltration applications. This study streamlines the fabrication process and achieves tailored selectivities and high permeances. By incorporating a polyanionic additive, the spun fibers have a positively charged lumen surface which allows for subsequent modification. The results show that this technique can create composite hollow fiber nanofiltration membranes without the need for multi-step post-treatment.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Mingming Wang, Xiaoyao Tan, Julius Motuzas, Jiaquan Li, Shaomin Liu
Summary: The study produced metallic nickel hollow fiber membranes with a dense skin layer and porous nickel substrate for hydrogen production from methane steam reforming. The membranes showed high efficiency and stability, making them a promising option for cost-effective hydrogen production at high temperatures.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Hanhan Chen, Claudia Li, Lu Liu, Bo Meng, Naitao Yang, Jaka Sunarso, Lihong Liu, Shaomin Liu, Xiaobin Wang
Summary: In this study, Co-based zeolitic imidazolate framework-67 (ZIF) membranes were successfully developed on porous ZnO hollow fibers using an in situ solvothermal growth method. The resulting membranes exhibited desirable permeation performance, ideal selectivities for single gas, and separation factors for gas mixtures. The membranes also displayed good stability in terms of gas permeances and showed excellent thermal stability. The development of these membranes provides important insights for the advancement of efficient gas separation technologies.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Shaowei Yang, Byunghyun Min, Qiang Fu, Christopher W. Jones, Sankar Nair
Summary: Viscosity-confined dry gel conversion (VCDGC) method is demonstrated for the fabrication of high-performance zeolite hollow fiber membranes. The synthesis and performance testing of small-pore CHA and medium-pore MFI membranes showcase the versatility and reliability of this method.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Environmental
A. Lopez-Urionabarrenechea, N. Gastelu, E. Acha, B. M. Caballero, I de Marco
Summary: This study presents a novel method to valorize the residual polymeric matrix of carbon fiber reinforced polymers (CFRP) through pyrolysis in the recycling process of carbon fibers. By optimizing operational parameters in the pyrolysis and oxidation steps, clean carbon fibers and a gaseous fraction with 75% volume of H2 were successfully obtained.
Review
Biochemistry & Molecular Biology
Zoi S. Metaxa, Athanasia K. Tolkou, Stefania Efstathiou, Abbas Rahdar, Evangelos P. Favvas, Athanasios C. Mitropoulos, George Z. Kyzas
Summary: By adding nanomaterials, the performance of cementitious composites can be effectively improved in terms of mechanical strength, acceleration of hydration, reduction of porosity, and enhancement of fire resistance. Nanomaterials can reinforce on the nanoscale, which enhances the overall performance of the cementitious matrix.
Editorial Material
Chemistry, Physical
Evangelos P. Favvas, Angelo Basile
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
George Theodorakopoulos, Dionysios S. Karousos, Konstantinos G. Mansouris, Andreas A. Sapalidis, Evangelos P. Kouvelos, Evangelos P. Favvas
Summary: Mixed matrix membranes play a crucial role in the preparation of stable, stretchy, durable and efficient membranes for gas separation applications. This article presents the development steps, structural characteristics, and gas selectivity properties of graphene nanoplatelets-based mixed matrix hollow fiber membranes.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Biochemistry & Molecular Biology
Ruben Hammerstein, Tim Schubert, Gerd Braun, Tobias Wolf, Stephan Barbe, Antje Quade, Ruediger Foest, Dionysios S. Karousos, Evangelos P. Favvas
Summary: This study prepared and studied supported cellulose acetate mixed matrix membranes for gas separation. The dispersion of carbon nanotube fillers and different mixing methods were investigated. The coating of the thin separation layer and the evaluation of agglomeration behavior were also studied. Gas permeation tests showed that the CA membrane had a high CO2/N-2 selectivity.
Article
Chemistry, Multidisciplinary
Zoi S. Metaxa, Spyridoula Boutsioukou, Maria Amenta, Evangelos P. Favvas, Stavros K. Kourkoulis, Nikolaos D. Alexopoulos
Summary: Multi-wall carbon nanotubes (MWCNTs) with exceptional mechanical and electrical properties were used to improve the performance of cement-based materials. Different concentrations of MWCNTs, surfactants, and superplasticizers were investigated to enhance a white cement mortar used in the restoration of cultural heritage monuments. Optimal combination of 0.8 wt% superplasticizer and 0.2 wt% MWCNTs resulted in significant improvements in electrical and mechanical properties.
Editorial Material
Chemistry, Multidisciplinary
Evangelos P. Favvas
Article
Chemistry, Multidisciplinary
Anastasia Patrinou, Eirini Tziviloglou, Athanasios Varoutoglou, Evangelos P. Favvas, Athanasios C. Mitropoulos, George Z. Kyzas, Zoi S. Metaxa
Summary: This study experimentally examined the individual effect of nano- and micro-carbon-based fillers on the mechanical and electrical properties of cement paste. The results showed that the addition of graphene nanoplatelets (GNPs) and recycled milled carbon fibers (rCFs) significantly improved the compressive and flexural strength of the cement composites, as well as reduced the electrical resistivity.
Article
Engineering, Environmental
Adele Brunetti, Linfeng Lei, Elisa Avruscio, Dionysis S. Karousos, Arne Lindbrathen, Evangelos P. Kouvelos, Xuezhong He, Evangelos P. Favvas, Giuseppe Barbieri
Summary: This study systematically investigated the separation performance of cellulose-based carbon hollow fiber membranes under real biogas upgrading conditions. The membranes exhibited good CO2/CH4 selectivity and durability against H2S and water vapor.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Danlin Chen, Feng Yang, Dionysis S. Karousos, Linfeng Lei, Evangelos P. Favvas, Xuezhong He
Summary: The construction of H2 infrastructure is crucial for the future H2 economy. Injecting H2 into existing natural gas pipelines and recovering it using carbon membranes is a feasible alternative for H2 transportation. The developed cellulose-derived carbon membrane showed excellent separation performance and stability, with H2 permeance of up to 21.3 GPU and H2/CH4 separation factor of up to 96. Techno-economic analysis demonstrated the cost-effectiveness of H2 recovery from natural gas pipelines using a two-stage carbon membrane system.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Michael Arkas, Konstantinos Giannakopoulos, Evangelos P. Favvas, Sergios Papageorgiou, George V. Theodorakopoulos, Artemis Giannoulatou, Michail Vardavoulias, Dimitrios A. Giannakoudakis, Konstantinos S. Triantafyllidis, Efthalia Georgiou, Ioannis Pashalidis
Summary: Two different silica conformations, xerogels and nanoparticles, were tested for uranyl cation sorption at low pHs using dendritic poly (ethylene imine) as a mediator. The study investigated the effect of factors such as temperature, electrostatic forces, adsorbent composition, pollutant accessibility, and organic matrix properties to determine the optimal formulation for water purification. Through various techniques including spectroscopy, light scattering, porosimetry, TGA, and SEM, the results showed that both adsorbents exhibited extraordinary sorption capacities. Xerogels were cost-effective and could be used to create composite purification devices.
Article
Biochemistry & Molecular Biology
Athanasios N. Vasileiou, George V. Theodorakopoulos, Dionysios S. Karousos, Mirtat Bouroushian, Andreas A. Sapalidis, Evangelos P. Favvas
Summary: In this study, Pebax-1657, a commercial multiblock copolymer, was used as a base polymer to prepare mixed matrix membranes (MMMs) with improved gas-separation performance and structural properties. Carbon nanofillers, including multi-walled carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs), were incorporated into the polymeric matrix. The developed membranes showed enhanced gas permeabilities and selectivity compared to the pure polymeric membrane. CO2 permeability reached 384 Barrer with a maximum CO2/CH4 separation factor of 21.9.
Article
Chemistry, Multidisciplinary
Eirini Tziviloglou, Zoi S. Metaxa, George Maistros, Stavros K. Kourkoulis, Dionysios S. Karousos, Evangelos P. Favvas, Nikolaos D. Alexopoulos
Summary: This investigation examines the potential of electrochemical impedance spectroscopy (EIS) in assessing the physical and structural properties of graphene-based cementitious nanocomposites. The study demonstrates that electrical resistivity decreases and total porosity increases with the inclusion of graphene nanoplatelets (xGnP). Moreover, there exists a linear correlation between fracture toughness and electrical resistivity, highlighting the usefulness of EIS in evaluating the physical and mechanical properties of conductive nano-reinforced cementitious nanocomposites.
Article
Polymer Science
Michael Arkas, Theofanis Bompotis, Konstantinos Giannakopoulos, Evangelos P. Favvas, Marina Arvanitopoulou, Konstantinos Arvanitopoulos, Labros Arvanitopoulos, Georgia Kythreoti, Michail Vardavoulias, Dimitrios A. Giannakoudakis, Laura Castellsagues, Sara Maria Soto Gonzalez
Summary: Leathers from different animals were treated with dispersions containing hydrophilic composite silica-hyperbranched poly(ethylene imine) xerogels, and the antimicrobial activity was introduced. The gel precursor solutions were infused before gelation to titanium oxide powders for self-cleaning properties. The dispersion of these biomimetically premade xerogels integrated environmentally friendly materials with short coating times, and the performance of the treated leathers was evaluated.
Review
Energy & Fuels
Dionysios S. Karousos, Danial Qadir, Andreas A. Sapalidis, Faizan Ahmad, Evangelos P. Favvas
Summary: Hydrogen serves as an efficient energy carrier with the capability to store and deliver a substantial amount of energy. Regardless of the production method, raw hydrogen needs to be separated/purified from other co-produced compounds. Membrane separation processes have gained significant attention due to their numerous advantages. This review article provides a summary of the main characteristics of three major membrane categories, namely polymeric, metallic, and carbon membranes. The strengths and limitations of each membrane material category are discussed, along with the review of selected articles and their highlighted evidence.
GAS SCIENCE AND ENGINEERING
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Evangelia G. Deze, Maria D. Bareka, Dionysis S. Karousos, Andreas A. Sapalidis, Evangelos P. Favvas
Summary: This work focuses on the preparation and investigation of hybrid catalytic porous materials, specifically studying their structural and functional properties. By utilizing a modified polyol route and two mesoporous siliceous templates, MCM-41 and MCF, copper nanoparticles (Cu NPs) were successfully synthesized and their size and dispersion on porous hosts were controlled through microwave irradiation. The characterization results confirmed the preparation of Cu NPs with an average diameter of approximately 16 nm in both composites. The catalytic activity of the materials showed enhanced efficiency in NO conversion to CO under stoichiometric conditions at moderate temperatures (around 400 degrees C).
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)